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<h1 id="account-data-callbacks"><a class="header" href="#account-data-callbacks">Account data callbacks</a></h1>
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<p>Account data callbacks allow module developers to react to changes of the account data
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of local users. Account data callbacks can be registered using the module API's
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<code>register_account_data_callbacks</code> method.</p>
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<h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2>
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<p>The available account data callbacks are:</p>
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<h3 id="on_account_data_updated"><a class="header" href="#on_account_data_updated"><code>on_account_data_updated</code></a></h3>
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<p><em>First introduced in Synapse v1.57.0</em></p>
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<pre><code class="language-python">async def on_account_data_updated(
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user_id: str,
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room_id: Optional[str],
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account_data_type: str,
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content: "synapse.module_api.JsonDict",
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) -> None:
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</code></pre>
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<p>Called after user's account data has been updated. The module is given the
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Matrix ID of the user whose account data is changing, the room ID the data is associated
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with, the type associated with the change, as well as the new content. If the account
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data is not associated with a specific room, then the room ID is <code>None</code>.</p>
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<p>This callback is triggered when new account data is added or when the data associated with
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a given type (and optionally room) changes. This includes deletion, since in Matrix,
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deleting account data consists of replacing the data associated with a given type
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(and optionally room) with an empty dictionary (<code>{}</code>).</p>
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<p>Note that this doesn't trigger when changing the tags associated with a room, as these are
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processed separately by Synapse.</p>
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<p>If multiple modules implement this callback, Synapse runs them all in order.</p>
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<h2 id="example"><a class="header" href="#example">Example</a></h2>
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<p>The example below is a module that implements the <code>on_account_data_updated</code> callback, and
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sends an event to an audit room when a user changes their account data.</p>
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<pre><code class="language-python">import json
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import attr
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from typing import Any, Dict, Optional
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from synapse.module_api import JsonDict, ModuleApi
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from synapse.module_api.errors import ConfigError
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@attr.s(auto_attribs=True)
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class CustomAccountDataConfig:
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audit_room: str
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sender: str
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class CustomAccountDataModule:
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def __init__(self, config: CustomAccountDataConfig, api: ModuleApi):
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self.api = api
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self.config = config
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self.api.register_account_data_callbacks(
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on_account_data_updated=self.log_new_account_data,
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)
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@staticmethod
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def parse_config(config: Dict[str, Any]) -> CustomAccountDataConfig:
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def check_in_config(param: str):
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if param not in config:
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raise ConfigError(f"'{param}' is required")
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check_in_config("audit_room")
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check_in_config("sender")
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return CustomAccountDataConfig(
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audit_room=config["audit_room"],
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sender=config["sender"],
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)
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async def log_new_account_data(
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self,
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user_id: str,
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room_id: Optional[str],
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account_data_type: str,
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content: JsonDict,
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) -> None:
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content_raw = json.dumps(content)
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msg_content = f"{user_id} has changed their account data for type {account_data_type} to: {content_raw}"
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if room_id is not None:
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msg_content += f" (in room {room_id})"
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await self.api.create_and_send_event_into_room(
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{
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"room_id": self.config.audit_room,
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"sender": self.config.sender,
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"type": "m.room.message",
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"content": {
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"msgtype": "m.text",
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"body": msg_content
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}
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}
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)
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</code></pre>
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