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Store BanList rules only in the room state cache.

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We do this so that there is only one source of truth for which rules
are active and it simplifies de-duplicating rules of conflicting event
types (e.g. m.room.rule.user vs m.policy.rule.user).
This commit is contained in:
gnuxie 2021-11-24 12:29:14 +00:00
parent 0bbfe93a4b
commit 33011ddb04
1 changed files with 22 additions and 6 deletions
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28
src/models/BanList.ts
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@ -75,7 +75,6 @@ export interface ListRuleChange {
* This cannot be used to update events in the modeled room, it is a readonly model of the policy room.
*/
export default class BanList {
private rules: ListRule[] = [];
private shortcode: string|null = null;
// A map of state events indexed first by state type and then state keys.
private state: Map<string, Map<string, any>> = new Map();
@ -122,6 +121,25 @@ export default class BanList {
}
}
/**
* Return all the active rules of a given kind.
* @param kind e.g. RULE_SERVER (m.policy.rule.server)
* @returns The active ListRules for the ban list of that kind.
*/
private rulesOfKind(kind: string): ListRule[] {
const rules: ListRule[] = []
const stateKeyMap = this.state.get(kind);
if (stateKeyMap) {
for (const event of stateKeyMap.values()) {
const rule = event?.unsigned?.rule;
if (rule && rule.kind === kind) {
rules.push(rule);
}
}
}
return rules;
}
public set listShortcode(newShortcode: string) {
const currentShortcode = this.shortcode;
this.shortcode = newShortcode;
@ -132,15 +150,15 @@ export default class BanList {
}
public get serverRules(): ListRule[] {
return this.rules.filter(r => r.kind === RULE_SERVER);
return this.rulesOfKind(RULE_SERVER);
}
public get userRules(): ListRule[] {
return this.rules.filter(r => r.kind === RULE_USER);
return this.rulesOfKind(RULE_USER);
}
public get roomRules(): ListRule[] {
return this.rules.filter(r => r.kind === RULE_ROOM);
return this.rulesOfKind(RULE_ROOM);
}
public get allRules(): ListRule[] {
@ -153,7 +171,6 @@ export default class BanList {
* @returns A description of any rules that were added, modified or removed from the list as a result of this update.
*/
public async updateList(): Promise<ListRuleChange[]> {
this.rules = [];
let changes: ListRuleChange[] = [];
const state = await this.client.getRoomState(this.roomId);
@ -250,7 +267,6 @@ export default class BanList {
if (changeType) {
changes.push({rule, changeType, event, sender: event.sender, ... previousState ? {previousState} : {} });
}
this.rules.push(rule);
}
return changes;
}