Build system, messages support and more

2019-07-02 13:59:52 -04:00 · 2019-07-02 13:59:52 -04:00 · 06c823aa67
commit 06c823aa67
parent 933341b7e6
53 changed files with 2264 additions and 446 deletions
--- a/.gitignore
+++ b/.gitignore
@ -1,12 +1,14 @@
 __pycache__
 .mypy_cache
-build
-dist
 *.egg-info
 *.pyc
+
 *.qmlc
 *.jsc

-.pylintrc
-
 tmp-*
+
+build
+dist
+.qmake.stash
+Makefile
--- a/.gitmodules
+++ b/.gitmodules
@ -0,0 +1,3 @@
+[submodule "submodules/SortFilterProxyModel"]
+	path = submodules/SortFilterProxyModel
+	url = https://github.com/oKcerG/SortFilterProxyModel
--- a/.pylintrc
+++ b/.pylintrc
@ -0,0 +1,362 @@
+[MASTER]
+
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code
+extension-pkg-whitelist=lxml.etree
+
+# Add files or directories to the blacklist. They should be base names, not
+# paths.
+ignore=.git
+
+# Add files or directories matching the regex patterns to the blacklist. The
+# regex matches against base names, not paths.
+ignore-patterns=
+
+# Python code to execute, usually for sys.path manipulation such as
+# pygtk.require().
+#init-hook=
+
+# Use multiple processes to speed up Pylint.
+jobs=6
+
+# List of plugins (as comma separated values of python modules names) to load,
+# usually to register additional checkers.
+load-plugins=
+
+# Pickle collected data for later comparisons.
+persistent=yes
+
+# Specify a configuration file.
+#rcfile=
+
+# When enabled, pylint would attempt to guess common misconfiguration and emit
+# user-friendly hints instead of false-positive error messages
+suggestion-mode=yes
+
+# Allow loading of arbitrary C extensions. Extensions are imported into the
+# active Python interpreter and may run arbitrary code.
+unsafe-load-any-extension=no
+
+
+[MESSAGES CONTROL]
+
+# Only show warnings with the listed confidence levels. Leave empty to show
+# all. Valid levels: HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED
+confidence=
+
+# Disable the message, report, category or checker with the given id(s). You
+# can either give multiple identifiers separated by comma (,) or put this
+# option multiple times (only on the command line, not in the configuration
+# file where it should appear only once).You can also use "--disable=all" to
+# disable everything first and then reenable specific checks. For example, if
+# you want to run only the similarities checker, you can use "--disable=all
+# --enable=similarities". If you want to run only the classes checker, but have
+# no Warning level messages displayed, use"--disable=all --enable=classes
+# --disable=W"
+#
+# C0111: Allow lack of literal """docstring""" (e.g. if assigning __doc__)
+# C0326: Allow aligning things like variable assignements
+# C0412: Remove annoying "imports are not grouped" because of :Isort with from
+# W0123: Allow eval()
+disable=C0111,C0326,C0412,W0123
+
+# (useful for modules/projects where namespaces are manipulated during runtime
+# and thus existing member attributes cannot be deduced by static analysis. It
+# supports qualified module names, as well as Unix pattern matching.
+ignored-modules=pyotherside
+
+# Show a hint with possible names when a member name was not found. The aspect
+# of finding the hint is based on edit distance.
+missing-member-hint=yes
+
+# The minimum edit distance a name should have in order to be considered a
+# similar match for a missing member name.
+missing-member-hint-distance=1
+
+# The total number of similar names that should be taken in consideration when
+# showing a hint for a missing member.
+missing-member-max-choices=1
+
+
+[SPELLING]
+
+# Limits count of emitted suggestions for spelling mistakes
+max-spelling-suggestions=4
+
+# Spelling dictionary name. Available dictionaries: none. To make it working
+# install pyenchant package.
+spelling-dict=
+
+# List of comma separated words that should not be checked.
+spelling-ignore-words=
+
+# A path to a file that contains private dictionary; one word per line.
+spelling-private-dict-file=
+
+# Tells whether to store unknown words to indicated private dictionary in
+# --spelling-private-dict-file option instead of raising a message.
+spelling-store-unknown-words=no
+
+
+[SIMILARITIES]
+
+# Ignore comments when computing similarities.
+ignore-comments=yes
+
+# Ignore docstrings when computing similarities.
+ignore-docstrings=yes
+
+# Ignore imports when computing similarities.
+ignore-imports=no
+
+# Minimum lines number of a similarity.
+min-similarity-lines=4
+
+
+[MISCELLANEOUS]
+
+# List of note tags to take in consideration, separated by a comma.
+notes=
+
+
+[LOGGING]
+
+# Logging modules to check that the string format arguments are in logging
+# function parameter format
+logging-modules=logging
+
+
+[FORMAT]
+
+# Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
+expected-line-ending-format=
+
+# Regexp for a line that is allowed to be longer than the limit.
+ignore-long-lines=^\s*(# )?<?https?://\S+>?$
+
+# Number of spaces of indent required inside a hanging  or continued line.
+indent-after-paren=4
+
+# String used as indentation unit. This is usually "    " (4 spaces) or "\t" (1
+# tab).
+indent-string='    '
+
+# Maximum number of characters on a single line.
+max-line-length=79
+
+# Maximum number of lines in a module
+max-module-lines=1000
+
+# List of optional constructs for which whitespace checking is disabled. `dict-
+# separator` is used to allow tabulation in dicts, etc.: {1  : 1,\n222: 2}.
+# `trailing-comma` allows a space between comma and closing bracket: (a, ).
+# `empty-line` allows space-only lines.
+no-space-check=trailing-comma,
+               dict-separator
+
+# Allow the body of a class to be on the same line as the declaration if body
+# contains single statement.
+single-line-class-stmt=no
+
+# Allow the body of an if to be on the same line as the test if there is no
+# else.
+single-line-if-stmt=no
+
+
+[BASIC]
+
+# Naming style matching correct argument names
+argument-naming-style=snake_case
+
+# Regular expression matching correct argument names. Overrides argument-
+# naming-style
+argument-rgx=[a-z0-9_]{2,65}$
+
+# Naming style matching correct attribute names
+attr-naming-style=snake_case
+
+# Regular expression matching correct attribute names. Overrides attr-naming-
+# style
+attr-rgx=[a-z0-9_]{2,65}$
+
+# Bad variable names which should always be refused, separated by a comma
+bad-names=
+
+# Naming style matching correct class attribute names
+class-attribute-naming-style=snake_case
+
+# Regular expression matching correct class attribute names. Overrides class-
+# attribute-naming-style
+class-attribute-rgx=[a-z0-9_]{2,65}$
+
+# Naming style matching correct class names
+class-naming-style=PascalCase
+
+# Regular expression matching correct class names. Overrides class-naming-style
+#class-rgx=
+
+# Naming style matching correct constant names
+const-naming-style=UPPER_CASE
+
+# Regular expression matching correct constant names. Overrides const-naming-
+# style
+const-rgx=(__[a-zA-Z0-9_]{2,65}__|[A-Z0-9_]{2,65})$
+
+# Minimum line length for functions/classes that require docstrings, shorter
+# ones are exempt.
+docstring-min-length=-1
+
+# Naming style matching correct function names
+function-naming-style=snake_case
+
+# Regular expression matching correct function names. Overrides function-
+# naming-style
+function-rgx=[a-z0-9_]{2,65}$
+
+# Good variable names which should always be accepted, separated by a comma
+good-names= _, a, b, i, j, k, v, w, h, x, y, z
+
+# Include a hint for the correct naming format with invalid-name
+include-naming-hint=no
+
+# Naming style matching correct inline iteration names
+inlinevar-naming-style=any
+
+# Regular expression matching correct inline iteration names. Overrides
+# inlinevar-naming-style
+#inlinevar-rgx=
+
+# Naming style matching correct method names
+method-naming-style=snake_case
+
+# Regular expression matching correct method names. Overrides method-naming-
+# style
+method-rgx=([a-z0-9_]{2,65}|on[A-Z][a-zA-Z0-9]{1,65})$
+
+# Naming style matching correct module names
+module-naming-style=snake_case
+
+# Regular expression matching correct module names. Overrides module-naming-
+# style
+module-rgx=[a-z0-9_]{2,65}$
+
+# Colon-delimited sets of names that determine each other's naming style when
+# the name regexes allow several styles.
+name-group=
+
+# Regular expression which should only match function or class names that do
+# not require a docstring.
+no-docstring-rgx=^
+
+# List of decorators that produce properties, such as abc.abstractproperty. Add
+# to this list to register other decorators that produce valid properties.
+property-classes=abc.abstractproperty
+
+# Naming style matching correct variable names
+variable-naming-style=snake_case
+
+# Regular expression matching correct variable names. Overrides variable-
+# naming-style
+variable-rgx=[a-z0-9_]{2,65}$
+
+
+[IMPORTS]
+
+# Allow wildcard imports from modules that define __all__.
+allow-wildcard-with-all=no
+
+# Analyse import fallback blocks. This can be used to support both Python 2 and
+# 3 compatible code, which means that the block might have code that exists
+# only in one or another interpreter, leading to false positives when analysed.
+analyse-fallback-blocks=no
+
+# Deprecated modules which should not be used, separated by a comma
+deprecated-modules=optparse,tkinter.tix
+
+# Create a graph of external dependencies in the given file (report RP0402 must
+# not be disabled)
+ext-import-graph=
+
+# Create a graph of every (i.e. internal and external) dependencies in the
+# given file (report RP0402 must not be disabled)
+import-graph=
+
+# Create a graph of internal dependencies in the given file (report RP0402 must
+# not be disabled)
+int-import-graph=
+
+# Force import order to recognize a module as part of the standard
+# compatibility libraries.
+known-standard-library=
+
+# Force import order to recognize a module as part of a third party library.
+known-third-party=enchant
+
+
+[DESIGN]
+
+# Maximum number of arguments for function / method
+max-args=99
+
+# Maximum number of attributes for a class (see R0902).
+max-attributes=99
+
+# Maximum number of boolean expressions in a if statement
+max-bool-expr=99
+
+# Maximum number of branch for function / method body
+max-branches=99
+
+# Maximum number of locals for function / method body
+max-locals=99
+
+# Maximum number of parents for a class (see R0901).
+max-parents=99
+
+# Maximum number of public methods for a class (see R0904).
+max-public-methods=99
+
+# Maximum number of return / yield for function / method body
+max-returns=99
+
+# Maximum number of statements in function / method body
+max-statements=999
+
+# Minimum number of public methods for a class (see R0903).
+min-public-methods=0
+
+
+[CLASSES]
+
+# List of method names used to declare (i.e. assign) instance attributes.
+defining-attr-methods=__init__,
+                      __new__,
+                      setUp
+
+# List of member names, which should be excluded from the protected access
+# warning.
+exclude-protected=_asdict,
+                  _fields,
+                  _replace,
+                  _source,
+                  _make
+
+# List of valid names for the first argument in a class method.
+valid-classmethod-first-arg=cls
+
+# List of valid names for the first argument in a metaclass class method.
+valid-metaclass-classmethod-first-arg=mcs
+
+
+[EXCEPTIONS]
+
+# Exceptions that will emit a warning when being caught. Defaults to
+# "Exception"
+# Catching this is safe enough in Python 3.
+#overgeneral-exceptions=Exception
+overgeneral-exceptions=
+
+
+[TYPECHECK]
+generated-members=sh
--- a/1098
+++ b/1098
--- a/README.md
+++ b/README.md
@ -0,0 +1,16 @@
+# harmonyqml
+
+## Dependencies setup
+
+### [pyotherside](https://github.com/thp/pyotherside)
+
+	git clone https://github.com/thp/pyotherside
+	cd pyotherside
+	qmake
+	make
+	sudo make install
+
+After this, verify the permissions of the installed plugin files.
+
+	sudo chmod 644 /usr/lib/qt5/qml/io/thp/pyotherside/*
+	sudo chmod 755 /usr/lib/qt5/qml/io/thp/pyotherside/*.so
--- a/BIN
+++ b/BIN
--- a/harmonyqml.pro
+++ b/harmonyqml.pro
@ -0,0 +1,68 @@
+TEMPLATE = app
+QT = quick
+DEFINES += QT_DEPRECATED_WARNINGS
+CONFIG += release warn_off c++11
+
+BUILD_DIR = build
+MOC_DIR = $$BUILD_DIR/moc
+OBJECTS_DIR = $$BUILD_DIR/obj
+RCC_DIR = $$BUILD_DIR/rcc
+
+QRC_FILE = $$BUILD_DIR/resources.qrc
+!no_embedded {
+    RESOURCES += $$QRC_FILE
+}
+
+SOURCES += src/main.cpp
+TARGET = harmonyqml
+
+
+# Libraries includes
+
+include(submodules/SortFilterProxyModel/SortFilterProxyModel.pri)
+
+
+# Custom functions
+
+defineReplace(glob_filenames) {
+    for(pattern, ARGS) {
+        results *= $$files(src/$${pattern}, true)
+    }
+    return($$results)
+}
+
+
+# Generate resource file
+
+RESOURCE_FILES *= $$glob_filenames(qmldir, *.qml, *.js, *.py)
+RESOURCE_FILES *= $$glob_filenames( *.jpg, *.jpeg, *.png, *.svg)
+
+file_content += '<!-- vim: set ft=xml : -->'
+file_content += '<!DOCTYPE RCC>'
+file_content += '<RCC version="1.0">'
+file_content += '<qresource prefix="/">'
+
+for(file, RESOURCE_FILES) {
+    alias = $$replace(file, src/, '')
+    file_content += '    <file alias="$$alias">../$$file</file>'
+}
+
+file_content += '</qresource>'
+file_content += '</RCC>'
+
+write_file($$QRC_FILE, file_content)
+
+
+# Add stuff to `make clean`
+
+# Allow cleaning folders instead of just files
+win32:QMAKE_DEL_FILE = rmdir /q /s
+unix:QMAKE_DEL_FILE = rm -rf
+
+for(file, $$list($$glob_filenames(*.py))) {
+    PYCACHE_DIRS *= $$dirname(file)/__pycache__
+}
+
+QMAKE_CLEAN *= $$MOC_DIR $$OBJECTS_DIR $$RCC_DIR $$PYCACHE_DIRS $$QRC_FILE
+QMAKE_CLEAN *= $$BUILD_DIR Makefile .qmake.stash
+QMAKE_CLEAN *= $$glob_filenames(*.pyc, *.qmlc, *.jsc, *.egg-info)
--- a/live_reload.sh
+++ b/live_reload.sh
@ -0,0 +1,10 @@
+#!/usr/bin/env sh
+
+# pdb won't be usable with entr,
+# use https://pypi.org/project/remote-pdb/ instead
+
+# no_embedded (resources) is used to speed up the compilation
+
+find src harmonyqml.pro -type f |
+entr -cdnr sh -c \
+    'qmake CONFIG+=no_embedded && make && ./harmonyqml --debug'
--- a/run.sh
+++ b/run.sh
@ -1,3 +0,0 @@
-#!/usr/bin/env sh
-
-qml src/qml/Window.qml
--- a/run_live_reload.sh
+++ b/run_live_reload.sh
@ -1,8 +0,0 @@
-#!/usr/bin/env sh
-
-while true; do
-    clear
-    qml src/qml/Window.qml -- --debug
-    exit_code="$?"
-    if [ "$exit_code" != 231 ]; then break; fi
-done
--- a/src/events/rooms_timeline.py
+++ b/src/events/rooms_timeline.py
@ -1,8 +0,0 @@
-from datetime import datetime
-from typing import Dict, Optional
-
-from dataclasses import dataclass, field
-
-from .event import Event
-
-
--- a/src/main.cpp
+++ b/src/main.cpp
@ -0,0 +1,23 @@
+#include <QGuiApplication>
+#include <QQmlEngine>
+#include <QQmlContext>
+#include <QQmlComponent>
+#include <QFileInfo>
+#include <QUrl>
+
+
+int main(int argc, char *argv[]) {
+    QGuiApplication app(argc, argv);
+
+    QQmlEngine engine;
+    QQmlContext *objectContext = new QQmlContext(engine.rootContext());
+
+    QQmlComponent component(
+        &engine,
+        QFileInfo::exists("qrc:/qml/Window.qml") ?
+        "qrc:/qml/Window.qml" : "src/qml/Window.qml"
+    );
+    component.create(objectContext);
+
+    return app.exec();
+}
--- a/src/matrix_client.py
+++ b/src/matrix_client.py
@ -1,124 +0,0 @@
-import asyncio
-import inspect
-import platform
-from contextlib import suppress
-from typing import Optional
-
-import nio
-
-from . import __about__
-from .events import rooms, users
-
-
-class MatrixClient(nio.AsyncClient):
-    def __init__(self,
-                 user:       str,
-                 homeserver: str           = "https://matrix.org",
-                 device_id:  Optional[str] = None) -> None:
-
-        # TODO: ensure homeserver starts with a scheme://
-        self.sync_task: Optional[asyncio.Task] = None
-        super().__init__(homeserver=homeserver, user=user, device_id=device_id)
-
-        self.connect_callbacks()
-
-
-    def __repr__(self) -> str:
-        return "%s(user_id=%r, homeserver=%r, device_id=%r)" % (
-            type(self).__name__, self.user_id, self.homeserver, self.device_id
-        )
-
-
-    def connect_callbacks(self) -> None:
-        for name in dir(nio.responses):
-            if name.startswith("_"):
-                continue
-
-            obj = getattr(nio.responses, name)
-            if inspect.isclass(obj) and issubclass(obj, nio.Response):
-                with suppress(AttributeError):
-                    self.add_response_callback(getattr(self, f"on{name}"), obj)
-
-
-    async def start_syncing(self) -> None:
-        self.sync_task = asyncio.ensure_future(  # type: ignore
-            self.sync_forever(timeout=10_000)
-        )
-
-
-    @property
-    def default_device_name(self) -> str:
-        os_ = f" on {platform.system()}".rstrip()
-        os_ = f"{os_} {platform.release()}".rstrip() if os_ != " on" else ""
-        return f"{__about__.__pretty_name__}{os_}"
-
-
-    async def login(self, password: str) -> None:
-        response = await super().login(password, self.default_device_name)
-
-        if isinstance(response, nio.LoginError):
-            print(response)
-        else:
-            await self.start_syncing()
-
-
-    async def resume(self, user_id: str, token: str, device_id: str) -> None:
-        self.receive_response(nio.LoginResponse(user_id, device_id, token))
-        await self.start_syncing()
-
-
-    async def logout(self) -> None:
-        if self.sync_task:
-            self.sync_task.cancel()
-            with suppress(asyncio.CancelledError):
-                await self.sync_task
-
-        await self.close()
-
-
-    async def request_user_update_event(self, user_id: str) -> None:
-        response = await self.get_profile(user_id)
-
-        users.UserUpdated(
-            user_id        = user_id,
-            display_name   = response.displayname,
-            avatar_url     = response.avatar_url,
-            status_message = None,  # TODO
-        )
-
-
-    # Callbacks for nio responses
-
-    async def onSyncResponse(self, response: nio.SyncResponse) -> None:
-        for room_id in response.rooms.invite:
-            room: nio.rooms.MatrixRoom = self.invited_rooms[room_id]
-
-            rooms.RoomUpdated(
-                user_id      = self.user_id,
-                category     = "Invites",
-                room_id      = room_id,
-                display_name = room.display_name,
-                avatar_url   = room.gen_avatar_url,
-                topic        = room.topic,
-                inviter      = room.inviter,
-            )
-
-        for room_id in response.rooms.join:
-            room = self.rooms[room_id]
-
-            rooms.RoomUpdated(
-                user_id      = self.user_id,
-                category     = "Rooms",
-                room_id      = room_id,
-                display_name = room.display_name,
-                avatar_url   = room.gen_avatar_url,
-                topic        = room.topic,
-            )
-
-        for room_id in response.rooms.left:
-            rooms.RoomUpdated(
-                user_id  = self.user_id,
-                category = "Left",
-                room_id  = room_id,
-                # left_event TODO
-            )
--- a/src/python/about.py
+++ b/src/python/about.py
--- a/src/python/init.py
+++ b/src/python/init.py
--- a/src/python/app.py
+++ b/src/python/app.py
@ -1,4 +1,5 @@
 import asyncio
+import signal
 from concurrent.futures import Future
 from pathlib import Path
 from threading import Thread
@ -15,31 +16,16 @@ class App:
    def __init__(self) -> None:
        self.appdirs = AppDirs(appname=__about__.__pkg_name__, roaming=True)

-        self.backend = None
+        from .backend import Backend
+        self.backend = Backend(app=self)

        self.loop        = asyncio.get_event_loop()
        self.loop_thread = Thread(target=self._loop_starter)
        self.loop_thread.start()


-    def start(self, cli_flags: Sequence[str] = ()) -> bool:
-        debug = False
-
-        if "-d" in cli_flags or "--debug" in cli_flags:
-            self.run_in_loop(self._exit_on_app_file_change())
-            debug = True
-
-        from .backend import Backend
-        self.backend = Backend(app=self)  # type: ignore
-
-        return debug
-
-
-    async def _exit_on_app_file_change(self) -> None:
-        from watchgod import awatch
-
-        async for _ in awatch(Path(__file__).resolve().parent):
-            ExitRequested(231)
+    def is_debug_on(self, cli_flags: Sequence[str] = ()) -> bool:
+        return "-d" in cli_flags or "--debug" in cli_flags


    def _loop_starter(self) -> None:
@ -74,7 +60,7 @@ class App:
                         name:       str,
                         args:       Optional[List[str]]      = None,
                         kwargs:     Optional[Dict[str, Any]] = None) -> str:
-        client = self.backend.clients[account_id]  # type: ignore
+        client = self.backend.clients[account_id]
        return self._call_coro(
            getattr(client, name)(*args or [], **kwargs or {})
        )
@ -85,14 +71,19 @@ class App:
        ad = additional_data
        rl = self.run_in_loop
        ba = self.backend
-        cl = self.backend.clients  # type: ignore
+        cl = self.backend.clients
        tcl = lambda user: cl[f"@test_{user}:matrix.org"]

        import json
        jd = lambda obj: print(json.dumps(obj, indent=4, ensure_ascii=False))

-        import pdb
-        pdb.set_trace()
+        print("\n=> Run `socat readline tcp:127.0.0.1:4444` in a terminal "
+              "to connect to pdb.")
+        import remote_pdb
+        remote_pdb.RemotePdb("127.0.0.1", 4444).set_trace()


+# Make CTRL-C work again
+signal.signal(signal.SIGINT, signal.SIG_DFL)
+
 APP = App()
--- a/src/python/backend.py
+++ b/src/python/backend.py
@ -1,7 +1,7 @@
 import asyncio
 import json
 from pathlib import Path
-from typing import Any, Dict, Optional, Tuple
+from typing import Dict, Optional, Tuple

 from atomicfile import AtomicFile

@ -29,13 +29,14 @@ class Backend:
                           user:       str,
                           password:   str,
                           device_id:  Optional[str] = None,
-                           homeserver: str = "https://matrix.org") -> None:
+                           homeserver: str = "https://matrix.org") -> str:
        client = MatrixClient(
            user=user, homeserver=homeserver, device_id=device_id
        )
        await client.login(password)
        self.clients[client.user_id] = client
        users.AccountUpdated(client.user_id)
+        return client.user_id


    async def resume_client(self,
@ -98,13 +99,15 @@ class Backend:
        ))


-    async def save_account(self, client: MatrixClient) -> None:
+    async def save_account(self, user_id: str) -> None:
+        client = self.clients[user_id]
+
        await self._write_config({
            **self.saved_accounts,
-            client.userId: {
-                "hostname":  client.nio.host,
-                "token":     client.nio.access_token,
-                "device_id": client.nio.device_id,
+            client.user_id: {
+                "homeserver": client.homeserver,
+                "token":      client.access_token,
+                "device_id":  client.device_id,
            }
        })

@ -119,7 +122,7 @@ class Backend:
    async def _write_config(self, accounts: SavedAccounts) -> None:
        js = json.dumps(accounts, indent=4, ensure_ascii=False, sort_keys=True)

-        with CONFIG_LOCK:
+        async with CONFIG_LOCK:
            self.saved_accounts_path.parent.mkdir(parents=True, exist_ok=True)

            with AtomicFile(self.saved_accounts_path, "w") as new:
--- a/src/python/events/init.py
+++ b/src/python/events/init.py
--- a/src/python/events/app.py
+++ b/src/python/events/app.py
--- a/src/python/events/event.py
+++ b/src/python/events/event.py
--- a/src/python/events/rooms.py
+++ b/src/python/events/rooms.py
--- a/src/python/events/rooms_timeline.py
+++ b/src/python/events/rooms_timeline.py
@ -0,0 +1,32 @@
+from datetime import datetime
+from enum import auto
+
+from dataclasses import dataclass, field
+
+from .event import AutoStrEnum, Event
+
+
+class EventType(AutoStrEnum):
+    text     = auto()
+    html     = auto()
+    file     = auto()
+    image    = auto()
+    audio    = auto()
+    video    = auto()
+    location = auto()
+    notice   = auto()
+
+
+@dataclass
+class TimelineEvent(Event):
+    type:          EventType = field()
+    room_id:       str       = field()
+    event_id:      str       = field()
+    sender_id:     str       = field()
+    date:          datetime  = field()
+    is_local_echo: bool      = field()
+
+
+@dataclass
+class HtmlMessageReceived(TimelineEvent):
+    content: str = field()
--- a/src/python/events/users.py
+++ b/src/python/events/users.py
--- a/src/python/html_filter.py
+++ b/src/python/html_filter.py
@ -0,0 +1,153 @@
+# Copyright 2019 miruka
+# This file is part of harmonyqml, licensed under GPLv3.
+
+import re
+
+import mistune
+from lxml.html import HtmlElement, etree  # nosec
+
+import html_sanitizer.sanitizer as sanitizer
+
+
+class HtmlFilter:
+    link_regexes = [re.compile(r, re.IGNORECASE) for r in [
+        (r"(?P<body>.+://(?P<host>[a-z0-9._-]+)(?:/[/\-_.,a-z0-9%&?;=~]*)?"
+         r"(?:\([/\-_.,a-z0-9%&?;=~]*\))?)"),
+        r"mailto:(?P<body>[a-z0-9._-]+@(?P<host>[a-z0-9_.-]+[a-z]))",
+        r"tel:(?P<body>[0-9+-]+)(?P<host>)",
+        r"(?P<body>magnet:\?xt=urn:[a-z0-9]+:.+)(?P<host>)",
+    ]]
+
+
+    def __init__(self) -> None:
+        self._sanitizer = sanitizer.Sanitizer(self.sanitizer_settings)
+
+        # The whitespace remover doesn't take <pre> into account
+        sanitizer.normalize_overall_whitespace         = lambda html: html
+        sanitizer.normalize_whitespace_in_text_or_tail = lambda el: el
+
+        # hard_wrap: convert all \n to <br> without required two spaces
+        self._markdown_to_html = mistune.Markdown(hard_wrap=True)
+
+
+    def from_markdown(self, text: str) -> str:
+        return self.filter(self._markdown_to_html(text))
+
+
+    def filter(self, html: str) -> str:
+        html = self._sanitizer.sanitize(html)
+        tree = etree.fromstring(html, parser=etree.HTMLParser())
+
+        if tree is None:
+            return ""
+
+        for el in tree.iter("img"):
+            el = self._wrap_img_in_a(el)
+
+        for el in tree.iter("a"):
+            el = self._append_img_to_a(el)
+
+        result = b"".join((etree.tostring(el, encoding="utf-8")
+                           for el in tree[0].iterchildren()))
+
+        return str(result, "utf-8")
+
+
+    @property
+    def sanitizer_settings(self) -> dict:
+        # https://matrix.org/docs/spec/client_server/latest.html#m-room-message-msgtypes
+        return {
+            "tags": {
+                # TODO: mx-reply, audio, video
+                "font", "h1", "h2", "h3", "h4", "h5", "h6",
+                "blockquote", "p", "a", "ul", "ol", "sup", "sub", "li",
+                "b", "i", "s", "u", "code", "hr", "br",
+                "table", "thead", "tbody", "tr", "th", "td",
+                "pre", "img",
+            },
+            "attributes": {
+                # TODO: translate font attrs to qt html subset
+                "font": {"data-mx-bg-color", "data-mx-color"},
+                "a":    {"href"},
+                "img":  {"width", "height", "alt", "title", "src"},
+                "ol":   {"start"},
+                "code": {"class"},
+            },
+            "empty": {"hr", "br", "img"},
+            "separate": {
+                "a", "p", "li", "table", "tr", "th", "td", "br", "hr"
+            },
+            "whitespace": {},
+            "add_nofollow": False,
+            "autolink": {  # FIXME: arg dict not working
+                "link_regexes": self.link_regexes,
+                "avoid_hosts": [],
+            },
+            "sanitize_href": lambda href: href,
+            "element_preprocessors": [
+                sanitizer.bold_span_to_strong,
+                sanitizer.italic_span_to_em,
+                sanitizer.tag_replacer("strong", "b"),
+                sanitizer.tag_replacer("em", "i"),
+                sanitizer.tag_replacer("strike", "s"),
+                sanitizer.tag_replacer("del", "s"),
+                sanitizer.tag_replacer("span", "font"),
+                self._remove_empty_font,
+                sanitizer.tag_replacer("form", "p"),
+                sanitizer.tag_replacer("div", "p"),
+                sanitizer.tag_replacer("caption", "p"),
+                sanitizer.target_blank_noopener,
+            ],
+            "element_postprocessors": [],
+            "is_mergeable": lambda e1, e2: e1.attrib == e2.attrib,
+        }
+
+
+    def _remove_empty_font(self, el: HtmlElement) -> HtmlElement:
+        if el.tag != "font":
+            return el
+
+        if not self.sanitizer_settings["attributes"]["font"] & set(el.keys()):
+            el.clear()
+
+        return el
+
+
+    def _wrap_img_in_a(self, el: HtmlElement) -> HtmlElement:
+        link   = el.attrib.get("src", "")
+        width  = el.attrib.get("width", "256")
+        height = el.attrib.get("height", "256")
+
+        if el.getparent().tag == "a" or el.tag != "img" or \
+           not self._is_image_path(link):
+            return el
+
+        el.tag    = "a"
+        el.attrib.clear()
+        el.attrib["href"] = link
+        el.append(etree.Element("img", src=link, width=width, height=height))
+        return el
+
+
+    def _append_img_to_a(self, el: HtmlElement) -> HtmlElement:
+        link = el.attrib.get("href", "")
+
+        if not (el.tag == "a" and self._is_image_path(link)):
+            return el
+
+        for _ in el.iter("img"):  # if the <a> already has an <img> child
+            return el
+
+        el.append(etree.Element("br"))
+        el.append(etree.Element("img", src=link, width="256", height="256"))
+        return el
+
+
+    @staticmethod
+    def _is_image_path(link: str) -> bool:
+        return bool(re.match(
+            r".+\.(jpg|jpeg|png|gif|bmp|webp|tiff|svg)$", link, re.IGNORECASE
+        ))
+
+
+HTML_FILTER = HtmlFilter()
--- a/src/python/matrix_client.py
+++ b/src/python/matrix_client.py
@ -0,0 +1,182 @@
+import asyncio
+import inspect
+import logging as log
+import platform
+from contextlib import suppress
+from datetime import datetime
+from types import ModuleType
+from typing import Dict, Optional, Type
+
+import nio
+
+from . import __about__
+from .events import rooms, users
+from .events.rooms_timeline import EventType, HtmlMessageReceived
+from .html_filter import HTML_FILTER
+
+
+class MatrixClient(nio.AsyncClient):
+    def __init__(self,
+                 user:       str,
+                 homeserver: str           = "https://matrix.org",
+                 device_id:  Optional[str] = None) -> None:
+
+        # TODO: ensure homeserver starts with a scheme://
+        self.sync_task: Optional[asyncio.Future] = None
+        super().__init__(homeserver=homeserver, user=user, device_id=device_id)
+
+        self.connect_callbacks()
+
+
+    def __repr__(self) -> str:
+        return "%s(user_id=%r, homeserver=%r, device_id=%r)" % (
+            type(self).__name__, self.user_id, self.homeserver, self.device_id
+        )
+
+
+    @staticmethod
+    def _classes_defined_in(module: ModuleType) -> Dict[str, Type]:
+        return {
+            m[0]: m[1] for m in inspect.getmembers(module, inspect.isclass)
+            if not m[0].startswith("_") and
+            m[1].__module__.startswith(module.__name__)
+        }
+
+
+    def connect_callbacks(self) -> None:
+        for name, class_ in self._classes_defined_in(nio.responses).items():
+            with suppress(AttributeError):
+                self.add_response_callback(getattr(self, f"on{name}"), class_)
+
+        # TODO: get this implemented in AsyncClient
+        # for name, class_ in self._classes_defined_in(nio.events).items():
+            # with suppress(AttributeError):
+                # self.add_event_callback(getattr(self, f"on{name}"), class_)
+
+
+    async def start_syncing(self) -> None:
+        self.sync_task = asyncio.ensure_future(
+            self.sync_forever(timeout=10_000)
+        )
+
+        def callback(task):
+            raise task.exception()
+
+        self.sync_task.add_done_callback(callback)
+
+
+    @property
+    def default_device_name(self) -> str:
+        os_ = f" on {platform.system()}".rstrip()
+        os_ = f"{os_} {platform.release()}".rstrip() if os_ != " on" else ""
+        return f"{__about__.__pretty_name__}{os_}"
+
+
+    async def login(self, password: str) -> None:
+        response = await super().login(password, self.default_device_name)
+
+        if isinstance(response, nio.LoginError):
+            print(response)
+        else:
+            await self.start_syncing()
+
+
+    async def resume(self, user_id: str, token: str, device_id: str) -> None:
+        response = nio.LoginResponse(user_id, device_id, token)
+        await self.receive_response(response)
+        await self.start_syncing()
+
+
+    async def logout(self) -> None:
+        if self.sync_task:
+            self.sync_task.cancel()
+            with suppress(asyncio.CancelledError):
+                await self.sync_task
+
+        await self.close()
+
+
+    async def request_user_update_event(self, user_id: str) -> None:
+        response = await self.get_profile(user_id)
+
+        if isinstance(response, nio.ProfileGetError):
+            log.warning("Error getting profile for %r: %s", user_id, response)
+
+        users.UserUpdated(
+            user_id        = user_id,
+            display_name   = getattr(response, "displayname", None),
+            avatar_url     = getattr(response, "avatar_url", None),
+            status_message = None,  # TODO
+        )
+
+
+    # Callbacks for nio responses
+
+    @staticmethod
+    def _get_room_name(room: nio.rooms.MatrixRoom) -> Optional[str]:
+        # FIXME: reimplanted because of nio's non-standard room.display_name
+        name = room.name or room.canonical_alias
+        if name:
+            return name
+
+        name = room.group_name()
+        return None if name == "Empty room?" else name
+
+
+    async def onSyncResponse(self, resp: nio.SyncResponse) -> None:
+        for room_id, info in resp.rooms.invite.items():
+            room: nio.rooms.MatrixRoom = self.invited_rooms[room_id]
+
+            rooms.RoomUpdated(
+                user_id      = self.user_id,
+                category     = "Invites",
+                room_id      = room_id,
+                display_name = self._get_room_name(room),
+                avatar_url   = room.gen_avatar_url,
+                topic        = room.topic,
+                inviter      = room.inviter,
+            )
+
+        for room_id, info in resp.rooms.join.items():
+            room = self.rooms[room_id]
+
+            rooms.RoomUpdated(
+                user_id      = self.user_id,
+                category     = "Rooms",
+                room_id      = room_id,
+                display_name = self._get_room_name(room),
+                avatar_url   = room.gen_avatar_url,
+                topic        = room.topic,
+            )
+
+            asyncio.gather(*(
+                getattr(self, f"on{type(ev).__name__}")(room_id, ev)
+                for ev in info.timeline.events
+                if hasattr(self, f"on{type(ev).__name__}")
+            ))
+
+        for room_id, info in resp.rooms.leave.items():
+            rooms.RoomUpdated(
+                user_id  = self.user_id,
+                category = "Left",
+                room_id  = room_id,
+                # left_event TODO
+            )
+
+
+    # Callbacks for nio events
+
+    async def onRoomMessageText(self, room_id: str, ev: nio.RoomMessageText
+                               ) -> None:
+        is_html = ev.format == "org.matrix.custom.html"
+        filter_ = HTML_FILTER.filter
+
+        HtmlMessageReceived(
+            type          = EventType.html if is_html else EventType.text,
+            room_id       = room_id,
+            event_id      = ev.event_id,
+            sender_id     = ev.sender,
+            date          = datetime.fromtimestamp(ev.server_timestamp / 1000),
+            is_local_echo = False,
+            content       = filter_(ev.formatted_body) if is_html else ev.body,
+        )
--- a/src/qml/Base/HAvatar.qml
+++ b/src/qml/Base/HAvatar.qml
@ -7,7 +7,14 @@ Rectangle {
    property int dimension: HStyle.avatar.size
    property bool hidden: false

-    function hue_from_name(name) {
+    function stripUserId(user_id) {
+        return user_id.substring(1)  // Remove leading @
+    }
+    function stripRoomName(name) {
+        return name[0] == "#" ? name.substring(1) : name
+    }
+
+    function hueFromName(name) {
        var hue = 0
        for (var i = 0; i < name.length; i++) {
            hue += name.charCodeAt(i) * 99
@ -24,7 +31,7 @@ Rectangle {

    color: name ?
           Qt.hsla(
-               hue_from_name(name),
+               hueFromName(name),
               HStyle.avatar.background.saturation,
               HStyle.avatar.background.lightness,
               HStyle.avatar.background.alpha
--- a/src/qml/Base/HButton.qml
+++ b/src/qml/Base/HButton.qml
@ -32,11 +32,6 @@ Button {
    signal pressed
    signal released

-    function loadingUntilFutureDone(future) {
-        loading = true
-        future.onGotResult.connect(function() { loading = false })
-    }
-
    id: button

    background: Rectangle {
--- a/src/qml/Base/HListModel.qml
+++ b/src/qml/Base/HListModel.qml
@ -1,85 +1,112 @@
 import QtQuick 2.7
+import SortFilterProxyModel 0.2

-ListModel {
+SortFilterProxyModel {
    // To initialize a HListModel with items,
    // use `Component.onCompleted: extend([{"foo": 1, "bar": 2}, ...])`

-    id: listModel
+    id: sortFilteredModel
+
+    property var model: ListModel {}
+    sourceModel: model  // Can't assign a "ListModel {}" directly here
+
+    function append(dict)         { return model.append(dict) }
+    function clear()              { return model.clear() }
+    function insert(index, dict)  { return model.inset(index, dict) }
+    function move(from, to, n)    { return model.move(from, to, n) }
+    function remove(index, count) { return model.remove(index, count) }
+    function set(index, dict)     { return model.set(index, dict) }
+    function sync()               { return model.sync() }
+    function setProperty(index, prop, value) {
+        return model.setProperty(index, prop, value)
+    }

    function extend(new_items) {
        for (var i = 0; i < new_items.length; i++) {
-            listModel.append(new_items[i])
+            model.append(new_items[i])
        }
    }

-    function getIndices(where_role, is, max) {  // max: undefined or int
+    function getIndices(where_roles_are, max_results, max_tries) {
+        // max arguments: unefined or int
        var results = []

-        for (var i = 0; i < listModel.count; i++) {
-            if (listModel.get(i)[where_role] == is) {
-                results.push(i)
+        for (var i = 0; i < model.count; i++) {
+            var item    = model.get(i)
+            var include = true

-                if (max && results.length >= max) {
+            for (var role in where_roles_are) {
+                if (item[role] != where_roles_are[role]) {
+                    include = false
                    break
                }
            }
+
+            if (include) {
+                results.push(i)
+                if (max_results && results.length >= max_results) {
+                    break
+                }
+            }
+
+            if (max_tries && i >= max_tries) {
+                break
+            }
        }
        return results
    }

-    function getWhere(where_role, is, max) {
-        var indices = getIndices(where_role, is, max)
-        var results = []
+    function getWhere(roles_are, max_results, max_tries) {
+        var indices = getIndices(roles_are, max_results, max_tries)
+        var items = []

        for (var i = 0; i < indices.length; i++) {
-            results.push(listModel.get(indices[i]))
+            items.push(model.get(indices[i]))
        }
-        return results
+        return items
    }

-    function forEachWhere(where_role, is, max, func) {
-        var items = getWhere(where_role, is, max)
+    function forEachWhere(roles_are, func, max_results, max_tries) {
+        var items = getWhere(roles_are, max_results, max_tries)
        for (var i = 0; i < items.length; i++) {
-            func(item)
+            func(items[i])
        }
    }

-    function upsert(where_role, is, new_item, update_if_exist) {
-        // new_item can contain only the keys we're interested in updating
-
-        var indices = getIndices(where_role, is, 1)
+    function upsert(where_roles_are, new_item, update_if_exist, max_tries) {
+        var indices = getIndices(where_roles_are, 1, max_tries)

        if (indices.length == 0) {
-            listModel.append(new_item)
-            return listModel.get(listModel.count)
+            model.append(new_item)
+            return model.get(model.count)
        }

        if (update_if_exist != false) {
-            listModel.set(indices[0], new_item)
+            model.set(indices[0], new_item)
        }
-        return listModel.get(indices[0])
+        return model.get(indices[0])
    }

    function pop(index) {
-        var item = listModel.get(index)
-        listModel.remove(index)
+        var item = model.get(index)
+        model.remove(index)
        return item
    }

-    function popWhere(where_role, is, max) {
-        var indices = getIndices(where_role, is, max)
-        var results = []
+    function popWhere(roles_are, max_results, max_tries) {
+        var indices = getIndices(roles_are, max_results, max_tries)
+        var items = []

        for (var i = 0; i < indices.length; i++) {
-            results.push(listModel.get(indices[i]))
-            listModel.remove(indices[i])
+            items.push(model.get(indices[i]))
+            model.remove(indices[i])
        }
-        return results
+        return items
    }


    function toObject(item_list) {
-        item_list = item_list || listModel
+        item_list = item_list || sortFilteredModel
        var obj_list = []

        for (var i = 0; i < item_list.count; i++) {
--- a/src/qml/Chat/Banners/InviteBanner.qml
+++ b/src/qml/Chat/Banners/InviteBanner.qml
@ -6,6 +6,7 @@ Banner {

    color: HStyle.chat.inviteBanner.background

+    // TODO: get disp name from models.users, inviter = userid  now
    avatar.name: inviter ? inviter.displayname : ""
    //avatar.imageUrl: inviter ? inviter.avatar_url : ""

--- a/src/qml/Chat/Chat.qml
+++ b/src/qml/Chat/Chat.qml
@ -10,27 +10,27 @@ HColumnLayout {
    property string category: ""
    property string roomId: ""

-    readonly property var roomInfo:
-        Backend.accounts.get(userId)
-               .roomCategories.get(category)
-               .rooms.get(roomId)
+    readonly property var roomInfo: models.rooms.getWhere(
+        {"userId": userId, "roomId": roomId, "category": category}, 1
+    )[0]

-    readonly property var sender: Backend.users.get(userId)
+    readonly property var sender:
+        models.users.getWhere({"userId": userId}, 1)[0]

-    readonly property bool hasUnknownDevices:
-         category == "Rooms" ?
-         Backend.clients.get(userId).roomHasUnknownDevices(roomId) : false
+    readonly property bool hasUnknownDevices: false
+         //category == "Rooms" ?
+         //Backend.clients.get(userId).roomHasUnknownDevices(roomId) : false

    id: chatPage
    onFocusChanged: sendBox.setFocus()

-   Component.onCompleted: Backend.signals.roomCategoryChanged.connect(
-        function(forUserId, forRoomId, previous, now) {
-            if (chatPage && forUserId == userId && forRoomId == roomId) {
-                chatPage.category = now
-            }
-        }
-    )
+   //Component.onCompleted: Backend.signals.roomCategoryChanged.connect(
+        //function(forUserId, forRoomId, previous, now) {
+            //if (chatPage && forUserId == userId && forRoomId == roomId) {
+                //chatPage.category = now
+            //}
+        //}
+    //)

    RoomHeader {
        id: roomHeader
@ -77,72 +77,72 @@ HColumnLayout {
            }
        }

-        RoomSidePane {
-            id: roomSidePane
+//        RoomSidePane {
+            //id: roomSidePane

-            activeView: roomHeader.activeButton
-            property int oldWidth: width
-            onActiveViewChanged:
-                activeView ? restoreAnimation.start() : hideAnimation.start()
+            //activeView: roomHeader.activeButton
+            //property int oldWidth: width
+            //onActiveViewChanged:
+                //activeView ? restoreAnimation.start() : hideAnimation.start()

-            NumberAnimation {
-                id: hideAnimation
-                target: roomSidePane
-                properties: "width"
-                duration: HStyle.animationDuration
-                from: target.width
-                to: 0
+            //NumberAnimation {
+                //id: hideAnimation
+                //target: roomSidePane
+                //properties: "width"
+                //duration: HStyle.animationDuration
+                //from: target.width
+                //to: 0

-                onStarted: {
-                    target.oldWidth = target.width
-                    target.Layout.minimumWidth = 0
-                }
-            }
+                //onStarted: {
+                    //target.oldWidth = target.width
+                    //target.Layout.minimumWidth = 0
+                //}
+            //}

-            NumberAnimation {
-                id: restoreAnimation
-                target: roomSidePane
-                properties: "width"
-                duration: HStyle.animationDuration
-                from: 0
-                to: target.oldWidth
+            //NumberAnimation {
+                //id: restoreAnimation
+                //target: roomSidePane
+                //properties: "width"
+                //duration: HStyle.animationDuration
+                //from: 0
+                //to: target.oldWidth

-                onStopped: target.Layout.minimumWidth = Qt.binding(
-                    function() { return HStyle.avatar.size }
-                )
-           }
+                //onStopped: target.Layout.minimumWidth = Qt.binding(
+                    //function() { return HStyle.avatar.size }
+                //)
+           //}

-            collapsed: width < HStyle.avatar.size + 8
+            //collapsed: width < HStyle.avatar.size + 8

-            property bool wasSnapped: false
-            property int referenceWidth: roomHeader.buttonsWidth
-            onReferenceWidthChanged: {
-                if (chatSplitView.canAutoSize || wasSnapped) {
-                    if (wasSnapped) { chatSplitView.canAutoSize = true }
-                    width = referenceWidth
-                }
-            }
+            //property bool wasSnapped: false
+            //property int referenceWidth: roomHeader.buttonsWidth
+            //onReferenceWidthChanged: {
+                //if (chatSplitView.canAutoSize || wasSnapped) {
+                    //if (wasSnapped) { chatSplitView.canAutoSize = true }
+                    //width = referenceWidth
+                //}
+            //}

-            property int currentWidth: width
-            onCurrentWidthChanged: {
-                if (referenceWidth != width &&
-                    referenceWidth - 15 < width &&
-                    width < referenceWidth + 15)
-                {
-                    currentWidth = referenceWidth
-                    width = referenceWidth
-                    wasSnapped = true
-                    currentWidth = Qt.binding(
-                        function() { return roomSidePane.width }
-                    )
-                } else {
-                    wasSnapped = false
-                }
-            }
+            //property int currentWidth: width
+            //onCurrentWidthChanged: {
+                //if (referenceWidth != width &&
+                    //referenceWidth - 15 < width &&
+                    //width < referenceWidth + 15)
+                //{
+                    //currentWidth = referenceWidth
+                    //width = referenceWidth
+                    //wasSnapped = true
+                    //currentWidth = Qt.binding(
+                        //function() { return roomSidePane.width }
+                    //)
+                //} else {
+                    //wasSnapped = false
+                //}
+            //}

-            width: referenceWidth // Initial width
-            Layout.minimumWidth: HStyle.avatar.size
-            Layout.maximumWidth: parent.width
-        }
+            //width: referenceWidth // Initial width
+            //Layout.minimumWidth: HStyle.avatar.size
+            //Layout.maximumWidth: parent.width
+        //}
    }
 }
--- a/src/qml/Chat/RoomEventList/Daybreak.qml
+++ b/src/qml/Chat/RoomEventList/Daybreak.qml
@ -2,7 +2,7 @@ import QtQuick 2.7
 import "../../Base"

 HNoticePage {
-    text: dateTime.toLocaleDateString()
+    text: model.date.toLocaleDateString()
    color: HStyle.chat.daybreak.foreground
    backgroundColor: HStyle.chat.daybreak.background
    radius: HStyle.chat.daybreak.radius
--- a/src/qml/Chat/RoomEventList/EventContent.qml
+++ b/src/qml/Chat/RoomEventList/EventContent.qml
@ -16,7 +16,7 @@ Row {

    HAvatar {
        id: avatar
-        name: sender.displayName.value
+        name: sender.displayName || stripUserId(sender.userId)
        hidden: combine
        dimension: 28
    }
--- a/src/qml/Chat/RoomEventList/MessageContent.qml
+++ b/src/qml/Chat/RoomEventList/MessageContent.qml
@ -10,7 +10,7 @@ Row {
    HAvatar {
        id: avatar
        hidden: combine
-        name: sender.displayName.value
+        name: senderInfo.displayName || stripUserId(model.senderId)
        dimension: 48
    }

@ -38,8 +38,8 @@ Row {
                visible: height > 0

                id: nameLabel
-                text: sender.displayName.value
-                color: Qt.hsla(Backend.hueFromString(text),
+                text: senderInfo.displayName || model.senderId
+                color: Qt.hsla(avatar.hueFromName(avatar.name),
                               HStyle.displayName.saturation,
                               HStyle.displayName.lightness,
                               1)
@ -56,17 +56,16 @@ Row {
                width: parent.width

                id: contentLabel
-                text: (dict.formatted_body ?
-                       Backend.htmlFilter.filter(dict.formatted_body) :
-                       dict.body) +
+                text: model.content +
                      "&nbsp;&nbsp;<font size=" + HStyle.fontSize.small +
                      "px color=" + HStyle.chat.message.date + ">" +
-                      Qt.formatDateTime(dateTime, "hh:mm:ss") +
+                      Qt.formatDateTime(model.date, "hh:mm:ss") +
                      "</font>" +
-                      (isLocalEcho ?
+                      (model.isLocalEcho ?
                       "&nbsp;<font size=" + HStyle.fontSize.small +
                       "px>⏳</font>" : "")
-                textFormat: Text.RichText
+                textFormat: model.type == "text" ?
+                            Text.PlainText : Text.RichText
                color: HStyle.chat.message.body
                wrapMode: Text.Wrap

--- a/src/qml/Chat/RoomEventList/RoomEventDelegate.qml
+++ b/src/qml/Chat/RoomEventList/RoomEventDelegate.qml
@ -1,7 +1,6 @@
 import QtQuick 2.7
 import QtQuick.Layouts 1.3
 import "../../Base"
-import "../utils.js" as ChatJS

 Column {
    id: roomEventDelegate
@ -10,46 +9,47 @@ Column {
        return Math.round((((date2 - date1) % 86400000) % 3600000) / 60000)
    }

-    function getIsMessage(type_) { return type_.startsWith("RoomMessage") }
-
    function getPreviousItem() {
        return index < roomEventListView.model.count - 1 ?
                roomEventListView.model.get(index + 1) : null
    }

+    function getIsMessage(type) {
+        return true
+    }
+
    property var previousItem: getPreviousItem()
    signal reloadPreviousItem()
    onReloadPreviousItem: previousItem = getPreviousItem()

-    readonly property bool isMessage: getIsMessage(type)
+    property var senderInfo: null
+    Component.onCompleted:
+        senderInfo = models.users.getUser(chatPage.userId, senderId)

-    readonly property bool isUndecryptableEvent:
-        type === "OlmEvent" || type === "MegolmEvent"
+    //readonly property bool isMessage: ! model.type.match(/^event.*/)
+    readonly property bool isMessage: getIsMessage(model.type)

-    readonly property var sender: Backend.users.get(dict.sender)
+    readonly property bool isOwn: chatPage.userId === senderId

-    readonly property bool isOwn:
-        chatPage.userId === dict.sender
-
-    readonly property bool isFirstEvent: type == "RoomCreateEvent"
+    readonly property bool isFirstEvent: model.type == "eventCreate"

    readonly property bool combine:
        previousItem &&
        ! talkBreak &&
        ! dayBreak &&
        getIsMessage(previousItem.type) === isMessage &&
-        previousItem.dict.sender === dict.sender &&
-        minsBetween(previousItem.dateTime, dateTime) <= 5
+        previousItem.senderId === senderId &&
+        minsBetween(previousItem.date, model.date) <= 5

    readonly property bool dayBreak:
        isFirstEvent ||
        previousItem &&
-        dateTime.getDate() != previousItem.dateTime.getDate()
+        model.date.getDate() != previousItem.date.getDate()

    readonly property bool talkBreak:
        previousItem &&
        ! dayBreak &&
-        minsBetween(previousItem.dateTime, dateTime) >= 20
+        minsBetween(previousItem.date, model.date) >= 20


    property int standardSpacing: 16
--- a/src/qml/Chat/RoomEventList/RoomEventList.qml
+++ b/src/qml/Chat/RoomEventList/RoomEventList.qml
@ -1,4 +1,5 @@
 import QtQuick 2.7
+import SortFilterProxyModel 0.2
 import "../../Base"

 HRectangle {
@ -8,10 +9,19 @@ HRectangle {

    HListView {
        id: roomEventListView
-        delegate: RoomEventDelegate {}
-        model: Backend.roomEvents.get(chatPage.roomId)
        clip: true

+        model: HListModel {
+            sourceModel: models.timelines
+
+            filters: ValueFilter {
+                roleName: "roomId"
+                value: chatPage.roomId
+            }
+        }
+
+        delegate: RoomEventDelegate {}
+
        anchors.fill: parent
        anchors.leftMargin: space
        anchors.rightMargin: space
@ -29,7 +39,7 @@ HRectangle {

        onYPosChanged: {
            if (chatPage.category != "Invites" && yPos <= 0.1) {
-                Backend.loadPastEvents(chatPage.roomId)
+                //Backend.loadPastEvents(chatPage.roomId)
            }
        }
    }
--- a/src/qml/Chat/RoomHeader.qml
+++ b/src/qml/Chat/RoomHeader.qml
@ -3,7 +3,7 @@ import QtQuick.Layouts 1.3
 import "../Base"

 HRectangle {
-    property string displayName: ""
+    property var displayName: ""
    property string topic: ""

    property alias buttonsImplicitWidth: viewButtons.implicitWidth
@ -22,7 +22,7 @@ HRectangle {

        HAvatar {
            id: avatar
-            name: displayName
+            name: stripRoomName(displayName) || qsTr("Empty room")
            dimension: roomHeader.height
            Layout.alignment: Qt.AlignTop
        }
--- a/src/qml/Chat/RoomSidePane/MemberDelegate.qml
+++ b/src/qml/Chat/RoomSidePane/MemberDelegate.qml
@ -15,7 +15,7 @@ MouseArea {

        HAvatar {
            id: memberAvatar
-            name: member.displayName.value
+            name: member.displayName || stripUserId(member.userId)
        }

        HColumnLayout {
--- a/src/qml/Chat/SendBox.qml
+++ b/src/qml/Chat/SendBox.qml
@ -18,7 +18,7 @@ HRectangle {

        HAvatar {
            id: avatar
-            name: chatPage.sender.displayName.value
+            name: chatPage.sender.displayName || stripUserId(chatPage.userId)
            dimension: root.Layout.minimumHeight
        }

--- a/src/qml/EventHandlers/rooms.js
+++ b/src/qml/EventHandlers/rooms.js
@ -1,26 +1,28 @@
-function clientId(user_id, category, room_id) {
-    return user_id + " " + room_id + " " + category
-}
-
-
 function onRoomUpdated(user_id, category, room_id, display_name, avatar_url,
                       topic, last_event_date, inviter, left_event) {

-    var client_id = clientId(user_id, category, room_id)
-    var rooms     = models.rooms
+    models.roomCategories.upsert({"userId": user_id, "name": category}, {
+        "userId": user_id,
+        "name":   category
+    })
+
+    var rooms = models.rooms
+
+    function roles(for_category) {
+        return {"userId": user_id, "roomId": room_id, "category": for_category}
+    }

    if (category == "Invites") {
-        rooms.popWhere("clientId", clientId(user_id, "Rooms", room_id))
-        rooms.popWhere("clientId", clientId(user_id, "Left", room_id))
+        rooms.popWhere(roles("Rooms"), 1)
+        rooms.popWhere(roles("Left"), 1)
    }
    else if (category == "Rooms") {
-        rooms.popWhere("clientId", clientId(user_id, "Invites", room_id))
-        rooms.popWhere("clientId", clientId(user_id, "Left", room_id))
+        rooms.popWhere(roles("Invites"), 1)
+        rooms.popWhere(roles("Left"), 1)
    }
    else if (category == "Left") {
-        var old_room  =
-            rooms.popWhere("clientId", clientId(user_id, "Rooms", room_id)) ||
-            rooms.popWhere("clientId", clientId(user_id, "Invites", room_id))
+        var old_room  = rooms.popWhere(roles("Invites"), 1)[0] ||
+                        rooms.popWhere(roles("Rooms"), 1)[0]

        if (old_room) {
            display_name = old_room.displayName
@ -30,8 +32,7 @@ function onRoomUpdated(user_id, category, room_id, display_name, avatar_url,
        }
    }

-    rooms.upsert("clientId", client_id , {
-        "clientId":      client_id,
+    rooms.upsert(roles(category), {
        "userId":        user_id,
        "category":      category,
        "roomId":        room_id,
@ -47,8 +48,8 @@ function onRoomUpdated(user_id, category, room_id, display_name, avatar_url,


 function onRoomDeleted(user_id, category, room_id) {
-    var client_id = clientId(user_id, category, room_id)
-    return models.rooms.popWhere("clientId", client_id, 1)
+    var roles = {"userId": user_id, "roomId": room_id, "category": category}
+    models.rooms.popWhere(roles, 1)
 }


--- a/src/qml/EventHandlers/rooms_timeline.js
+++ b/src/qml/EventHandlers/rooms_timeline.js
@ -0,0 +1,12 @@
+function onHtmlMessageReceived(type, room_id, event_id, sender_id, date,
+                               is_local_echo, content) {
+    models.timelines.upsert({"eventId": event_id}, {
+        "type":        type,
+        "roomId":      room_id,
+        "eventId":     event_id,
+        "senderId":    sender_id,
+        "date":        date,
+        "isLocalEcho": is_local_echo,
+        "content":     content,
+    }, true, 1000)
+}
--- a/src/qml/EventHandlers/users.js
+++ b/src/qml/EventHandlers/users.js
@ -2,18 +2,17 @@ function onAccountUpdated(user_id) {
    models.accounts.append({"userId": user_id})
 }

-function AccountDeleted(user_id) {
-    models.accounts.popWhere("userId", user_id, 1)
+function onAccountDeleted(user_id) {
+    models.accounts.popWhere({"userId": user_id}, 1)
 }

 function onUserUpdated(user_id, display_name, avatar_url, status_message) {
-    models.users.upsert("userId", user_id, {
+    models.users.upsert({"userId": user_id}, {
        "userId":        user_id,
        "displayName":   display_name,
        "avatarUrl":     avatar_url,
        "statusMessage": status_message
    })
-
 }

 function onDeviceUpdated(user_id, device_id, ed25519_key, trust, display_name,
--- a/src/qml/Models.qml
+++ b/src/qml/Models.qml
@ -1,4 +1,5 @@
 import QtQuick 2.7
+import SortFilterProxyModel 0.2
 import "Base"

 QtObject {
@ -8,7 +9,7 @@ QtObject {
        function getUser(as_account_id, wanted_user_id) {
            wanted_user_id = wanted_user_id || as_account_id

-            var found = users.getWhere("userId", wanted_user_id, 1)
+            var found = users.getWhere({"userId": wanted_user_id}, 1)
            if (found.length > 0) { return found[0] }

            users.append({
@ -22,13 +23,20 @@ QtObject {
                as_account_id, "request_user_update_event", [wanted_user_id]
            )

-            return users.getWhere("userId", wanted_user_id, 1)[0]
+            return users.getWhere({"userId": wanted_user_id}, 1)[0]
        }
    }

    property HListModel devices: HListModel {}

+    property HListModel roomCategories: HListModel {}
+
    property HListModel rooms: HListModel {}

-    property HListModel timelines: HListModel {}
+    property HListModel timelines: HListModel {
+        sorters: RoleSorter {
+            roleName: "date"
+            sortOrder: Qt.DescendingOrder
+        }
+    }
 }
--- a/src/qml/Pages/RememberAccount.qml
+++ b/src/qml/Pages/RememberAccount.qml
@ -4,7 +4,7 @@ import "../Base"

 Item {
    property string loginWith: "username"
-    property var client: null
+    property string userId: ""

    HInterfaceBox {
        id: rememberBox
@ -20,10 +20,13 @@ Item {

        buttonCallbacks: {
            "yes": function(button) {
-                Backend.clients.remember(client)
+                py.callCoro("save_account", [userId])
+                pageStack.showPage("Default")
+            },
+            "no": function(button) {
+                py.callCoro("forget_account", [userId])
                pageStack.showPage("Default")
            },
-            "no": function(button) { pageStack.showPage("Default") },
        }

        HLabel {
--- a/src/qml/Pages/SignIn.qml
+++ b/src/qml/Pages/SignIn.qml
@ -4,7 +4,7 @@ import "../Base"

 Item {
    property string loginWith: "username"
-    onFocusChanged: identifierField.forceActiveFocus()
+    onFocusChanged: idField.forceActiveFocus()

    HInterfaceBox {
        id: signInBox
@ -23,15 +23,15 @@ Item {
            "register": function(button) {},

            "login": function(button) {
-                var future = Backend.clients.new(
-                    "matrix.org", identifierField.text, passwordField.text
-                )
-                button.loadingUntilFutureDone(future)
-                future.onGotResult.connect(function(client) {
+                button.loading = true
+                var args = [idField.text, passwordField.text]
+
+                py.callCoro("login_client", args, {}, function(user_id) {
                    pageStack.showPage(
                        "RememberAccount",
-                        {"loginWith": loginWith, "client": client}
+                        {"loginWith": loginWith, "userId": user_id}
                    )
+                    button.loading = false
                })
            },

@ -58,7 +58,7 @@ Item {
        }

        HTextField {
-            id: identifierField
+            id: idField
            placeholderText: qsTr(
                loginWith === "email" ? "Email" :
                loginWith === "phone" ? "Phone" :
--- a/src/qml/Python.qml
+++ b/src/qml/Python.qml
@ -9,6 +9,7 @@ Python {
    property bool ready: false
    property var pendingCoroutines: ({})

+    signal willLoadAccounts(bool will)
    property bool loadingAccounts: false

    function callCoro(name, args, kwargs, callback) {
@ -32,18 +33,20 @@ Python {
            }
        }

-        addImportPath("../..")
-        importNames("src", ["APP"], function() {
-            call("APP.start", [Qt.application.arguments], function(debug_on) {
-                window.debug = debug_on
+        addImportPath("src")
+        addImportPath("qrc:/")
+        importNames("python", ["APP"], function() {
+            call("APP.is_debug_on", [Qt.application.arguments], function(on) {
+                window.debug = on

                callCoro("has_saved_accounts", [], {}, function(has) {
-                    loadingAccounts = has
                    py.ready = true
+                    willLoadAccounts(has)

                    if (has) {
+                        py.loadingAccounts = true
                        py.callCoro("load_saved_accounts", [], {}, function() {
-                            loadingAccounts = false
+                            py.loadingAccounts = false
                        })
                    }
                })
--- a/src/qml/SidePane/AccountDelegate.qml
+++ b/src/qml/SidePane/AccountDelegate.qml
@ -20,7 +20,7 @@ Column {

        HAvatar {
            id: avatar
-            name: user.displayName
+            name: user.displayName || stripUserId(user.userId)
        }

        HColumnLayout {
--- a/src/qml/SidePane/PaneToolBar.qml
+++ b/src/qml/SidePane/PaneToolBar.qml
@ -4,6 +4,8 @@ import "../Base"
 HRowLayout {
    id: toolBar

+    property alias roomFilter: filterField.text
+
    Layout.fillWidth: true
    Layout.preferredHeight: HStyle.bottomElementsHeight

@ -17,8 +19,6 @@ HRowLayout {
        placeholderText: qsTr("Filter rooms")
        backgroundColor: HStyle.sidePane.filterRooms.background

-        onTextChanged: Backend.setRoomFilter(text)
-
        Layout.fillWidth: true
        Layout.preferredHeight: parent.height
    }
--- a/src/qml/SidePane/RoomCategoriesList.qml
+++ b/src/qml/SidePane/RoomCategoriesList.qml
@ -1,11 +1,20 @@
 import QtQuick 2.7
 import QtQuick.Layouts 1.3
+import SortFilterProxyModel 0.2
 import "../Base"

 HListView {
    property string userId: ""

    id: roomCategoriesList
-    model: Backend.accounts.get(userId).roomCategories
+
+    model: SortFilterProxyModel {
+        sourceModel: models.roomCategories
+        filters: ValueFilter {
+            roleName: "userId"
+            value: userId
+        }
+    }
+
    delegate: RoomCategoryDelegate {}
 }
--- a/src/qml/SidePane/RoomDelegate.qml
+++ b/src/qml/SidePane/RoomDelegate.qml
@ -12,11 +12,11 @@ MouseArea {

    HRowLayout {
        width: parent.width
-        spacing: roomList.spacing
+        spacing: sidePane.normalSpacing

        HAvatar {
            id: roomAvatar
-            name: displayName
+            name: stripRoomName(displayName) || qsTr("Empty room")
        }

        HColumnLayout {
@ -35,27 +35,27 @@ MouseArea {
                Layout.maximumWidth: parent.width
            }

-            HLabel {
-                function getText() {
-                    return SidePaneJS.getLastRoomEventText(
-                        roomId, roomList.userId
-                    )
-                }
+            //HLabel {
+                //function getText() {
+                    //return SidePaneJS.getLastRoomEventText(
+                        //roomId, roomList.userId
+                    //)
+                //}

-                property var lastEvTime: lastEventDateTime
-                onLastEvTimeChanged: subtitleLabel.text = getText()
+                //property var lastEvTime: lastEventDateTime
+                //onLastEvTimeChanged: subtitleLabel.text = getText()

-                id: subtitleLabel
-                visible: text !== ""
-                text: getText()
-                textFormat: Text.StyledText
+                //id: subtitleLabel
+                //visible: text !== ""
+                //text: getText()
+                //textFormat: Text.StyledText

-                font.pixelSize: HStyle.fontSize.small
-                elide: Text.ElideRight
-                maximumLineCount: 1
+                //font.pixelSize: HStyle.fontSize.small
+                //elide: Text.ElideRight
+                //maximumLineCount: 1

-                Layout.maximumWidth: parent.width
-            }
+                //Layout.maximumWidth: parent.width
+            //}
        }
    }
 }
--- a/src/qml/SidePane/RoomList.qml
+++ b/src/qml/SidePane/RoomList.qml
@ -1,5 +1,6 @@
 import QtQuick 2.7
 import QtQuick.Layouts 1.3
+import SortFilterProxyModel 0.2
 import "../Base"

 HListView {
@ -7,8 +8,37 @@ HListView {
    property string category: ""

    id: roomList
-    spacing: accountList.spacing
-    model:
-        Backend.accounts.get(userId).roomCategories.get(category).sortedRooms
+    spacing: sidePane.normalSpacing
+
+    model: SortFilterProxyModel {
+        sourceModel: models.rooms
+        filters: AllOf {
+            ValueFilter {
+                roleName: "category"
+                value: category
+            }
+
+            ValueFilter {
+                roleName: "userId"
+                value: userId
+            }
+
+            ExpressionFilter {
+                expression: {
+                    var filter = paneToolBar.roomFilter.toLowerCase()
+                    var words = filter.split(" ")
+                    var room_name = displayName.toLowerCase()
+
+                    for (var i = 0; i < words.length; i++) {
+                        if (words[i] && room_name.indexOf(words[i]) == -1) {
+                            return false
+                        }
+                    }
+                    return true
+                }
+            }
+        }
+    }
+
    delegate: RoomDelegate {}
 }
--- a/src/qml/SidePane/SidePane.qml
+++ b/src/qml/SidePane/SidePane.qml
@ -15,16 +15,18 @@ HRectangle {
            Layout.fillWidth: true
            Layout.fillHeight: true

-            spacing: collapsed ? 0 : normalSpacing
-            topMargin: spacing
-            bottomMargin: spacing
-            Layout.leftMargin: spacing
+            spacing: collapsed ? 0 : normalSpacing * 3
+            topMargin: normalSpacing
+            bottomMargin: normalSpacing
+            Layout.leftMargin: normalSpacing

            Behavior on spacing {
                NumberAnimation { duration: HStyle.animationDuration }
            }
        }

-        PaneToolBar {}
+        PaneToolBar {
+            id: paneToolBar
+        }
    }
 }
--- a/src/qml/UI.qml
+++ b/src/qml/UI.qml
@ -8,10 +8,15 @@ import "SidePane"
 Item {
    id: mainUI

+    Connections {
+        target: py
+        onWillLoadAccounts: function(will) {
+            pageStack.showPage(will ? "Default" : "SignIn")
+        }
+    }
+
    property bool accountsPresent:
        models.accounts.count > 0 || py.loadingAccounts
-    onAccountsPresentChanged:
-        pageStack.showPage(accountsPresent ? "Default" : "SignIn")

    HImage {
        id: mainUIBackground
--- a/submodules/SortFilterProxyModel
+++ b/submodules/SortFilterProxyModel
@ -0,0 +1 @@
+Subproject commit 770789ee484abf69c230cbf1b64f39823e79a181
				`@ -0,0 +1 @@`
				`Subproject commit 770789ee484abf69c230cbf1b64f39823e79a181`