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Simplify computation of analytics ID

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Since we now bundle a trusted Element Call widget with our messenger applications and this widget reports analytics to an endpoint determined by the messenger app, there is no longer any reason to compute a different analytics ID from the one used by the messenger app.
This commit is contained in:
Robin
2025-12-03 10:42:04 -05:00
parent e0bf51b63b
commit bbd92f666b
1 changed files with 4 additions and 28 deletions
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32
src/analytics/PosthogAnalytics.ts
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@@ -247,9 +247,8 @@ export class PosthogAnalytics {
// wins, and the first writer will send tracking with an ID that doesn't match the one on the server
// until the next time account data is refreshed and this function is called (most likely on next
// page load). This will happen pretty infrequently, so we can tolerate the possibility.
const accountDataAnalyticsId = analyticsIdGenerator();
await this.setAccountAnalyticsId(accountDataAnalyticsId);
analyticsID = await this.hashedEcAnalyticsId(accountDataAnalyticsId);
analyticsID = analyticsIdGenerator();
await this.setAccountAnalyticsId(analyticsID);
}
} catch (e) {
// The above could fail due to network requests, but not essential to starting the application,
@@ -270,37 +269,14 @@ export class PosthogAnalytics {
private async getAnalyticsId(): Promise<string | null> {
const client: MatrixClient = window.matrixclient;
let accountAnalyticsId: string | null;
if (widget) {
accountAnalyticsId = getUrlParams().posthogUserId;
return getUrlParams().posthogUserId;
} else {
const accountData = await client.getAccountDataFromServer(
PosthogAnalytics.ANALYTICS_EVENT_TYPE,
);
accountAnalyticsId = accountData?.id ?? null;
return accountData?.id ?? null;
}
if (accountAnalyticsId) {
// we dont just use the element web analytics ID because that would allow to associate
// users between the two posthog instances. By using a hash from the username and the element web analytics id
// it is not possible to conclude the element web posthog user id from the element call user id and vice versa.
return await this.hashedEcAnalyticsId(accountAnalyticsId);
}
return null;
}
private async hashedEcAnalyticsId(
accountAnalyticsId: string,
): Promise<string> {
const client: MatrixClient = window.matrixclient;
const posthogIdMaterial = "ec" + accountAnalyticsId + client.getUserId();
const bufferForPosthogId = await crypto.subtle.digest(
"sha-256",
new TextEncoder().encode(posthogIdMaterial),
);
const view = new Int32Array(bufferForPosthogId);
return Array.from(view)
.map((b) => Math.abs(b).toString(16).padStart(2, "0"))
.join("");
}
private async setAccountAnalyticsId(analyticsID: string): Promise<void> {