v4: weekly digests and monthly recaps go out by email, every email is written once as Markdown in the app's one catalog, and a review of the last two commits removes what they stated twice — users get a weekly digest (what happened to them, what the people and playlists they follow posted, the week's top dumps, the community) and a monthly recap (the month's top dumps and the community), both on by default, in their own style and scheme. digest-service sends what is due every quarter of an hour from digest_schedule (migration 0020), which holds each user's rolling 7- or 30-day period; existing users' first periods are spread over the coming week or month, a digest more than a period late covers the last full one, an empty one isn't sent, and an address like admin@localhost is skipped. Each digest carries a one-click unsubscribe (List-Unsubscribe and List-Unsubscribe-Post, POST /api/users/unsubscribe) and a link to the new /unsubscribe page, which asks before turning that cadence off, since mail scanners open every link; the token (lib/jwt) names the user and the cadence and never expires. The welcome email now says the digests are on. The emails' words moved out of a hand-written api/mail/strings.ts into the Lingui catalogs the interface uses: lingui extracts api/mail/ too, the catalogs moved to a top-level locales/ that both halves read, compile emits ES modules the server imports (api/mail/i18n.ts), messages take ICU plurals, and the labels the settings tab, the unsubscribe page and the emails share are one message each (their French had already drifted apart). Each template writes its email once as Markdown, which is the plain-text part, and EmailKit.render draws its blocks in the style (a lone link is a button, a list item starting with an image a thumbnail row, a numbered list a ranking, --- the footer), so no string is declared for an HTML and a text version; user text is escaped for Markdown, which the welcome body didn't do for usernames, whose _ read as emphasis. paint() set colors before a border-top shorthand that reset them, so every divider was black. The review also gave one home to what was written twice: the locale list (shared/locale.ts, read by lingui.config, the client, the server and its catalog loader), the base style and default scheme (shared/theme.ts), an email's look (lookOf, which digest-service, welcome and reset share), whether email is on (EMAIL_ENABLED, read by email-service and index.html), a setting's column and its default in the digests' SQL (SETTINGS_COLUMNS, DEFAULT_SETTINGS), the unsubscribe token (made once, not parsed back from a URL), AuthProvider's compare-and-store, ThemeProvider's twin style and scheme code (useThemeChoice), the test JWT encoder, and duplicate digest messages. The email palettes stay a flattened copy of the themes' tokens, now under a test that caught Times' secondary and link colors drifting. The Dockerfile copies api/mail and locales so the build extracts the emails' messages and the server finds its catalogs, and deno.json maps @lingui/core for the runtime image. 236 backend tests (new: digest building, sending, catch-up, scheduling and unsubscribing; the Markdown renderer; French from the catalog; palettes against themes; the stagger migration; unsubscribe tokens) and 661 frontend tests (new: the unsubscribe page) pass, and tsc, eslint, doc:lint, deno check, deno lint and deno fmt are clean.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
khannurien
622
api/mail/digest.ts
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622
api/mail/digest.ts
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@@ -0,0 +1,622 @@
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/**
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* Renders the weekly digest and the monthly recap, as the drafts approved
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* them: the weekly one has four sections (what happened to the reader, what
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* the people and playlists they follow posted, the period's top dumps, and
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* the community), the monthly one only the last two. `digest-service.ts`
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* gathers a {@link DigestContent} and sends what this returns, drawn in the
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* reader's own style and scheme.
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*
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* @module
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*/
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import { EMAIL_LOCALE, OG_SITE_NAME } from "../config.ts";
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import type { DigestCadence } from "../../shared/settings.ts";
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import { i18n } from "./i18n.ts";
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import {
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EmailKit,
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type EmailLook,
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escMd,
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mdLink,
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type RenderedEmail,
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} from "./layout.ts";
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/** The kinds of activity a weekly digest counts. */
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export type ActivityKind =
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| "upvotes"
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| "followers"
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| "comments"
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| "mentions"
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| "likes"
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| "playlistFollows";
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/** What a highlight of the weekly digest says happened. */
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export type HighlightKind =
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| "mentionComment"
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| "mentionDump"
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| "mentionPlaylist"
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| "mentionChat"
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| "comment"
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| "playlistFollow"
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| "userFollow"
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| "commentLike";
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/** A dump in a digest's lists, with its links made absolute. */
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export interface DigestDump {
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title: string;
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url: string;
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poster: string;
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/** The link's host, or null for an upload. */
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domain: string | null;
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/** An absolute image URL, or null to show no image. */
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thumbnail: string | null;
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votes: number;
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comments: number;
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/** Posted by the reader, which the lists mark. */
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mine: boolean;
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/** The followed playlist it was added to, when that's why it's listed. */
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addedTo?: string;
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}
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/** One line of the weekly digest's "For you", made from a notification. */
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export interface DigestHighlight {
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kind: HighlightKind;
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/** Who did it. */
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who: string;
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/** What they did it on, absent for a follow of the reader or the chat. */
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target?: { title: string; url: string };
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/** The comment or message, flattened and shortened. */
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quote?: string;
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at: Date;
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}
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/**
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* Passed to {@link renderDigestEmail} by `digest-service.ts`. Each section is
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* null when it has nothing to show, and is left out; the service sends
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* nothing when all of them are.
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*/
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export interface DigestContent {
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cadence: DigestCadence;
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/** The period covered, from `from` to `to`. */
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from: Date;
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to: Date;
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reader: string;
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/** Weekly only. */
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activity: {
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counts: Partial<Record<ActivityKind, number>>;
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highlights: DigestHighlight[];
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/** Every notification of the period, which the link to them counts. */
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total: number;
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} | null;
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/** Weekly only. */
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network: { dumps: DigestDump[]; more: number } | null;
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top: DigestDump[];
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community: {
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members: { username: string; invitedBy: string | null }[];
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membersMore: number;
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playlists: { title: string; url: string; owner: string; dumps: number }[];
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playlistsMore: number;
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chatMessages: number;
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totals: { dumps: number; upvotes: number; comments: number };
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} | null;
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links: {
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notifications: string;
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followed: string;
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chat: string;
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settings: string;
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/** The one-click page that turns this cadence off. */
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unsubscribe: string;
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};
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}
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const ACTIVITY_ORDER: ActivityKind[] = [
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"upvotes",
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"followers",
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"comments",
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"mentions",
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"likes",
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"playlistFollows",
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];
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/** Returns the label of `n` of a kind of activity, as in "12 upvotes". */
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function countLabel(kind: ActivityKind, n: number): string {
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switch (kind) {
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case "upvotes":
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return i18n._({
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id: "email.digest.count.upvotes",
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message: "{n, plural, one {upvote} other {upvotes}}",
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values: { n },
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});
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case "followers":
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return i18n._({
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id: "email.digest.count.followers",
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message: "{n, plural, one {new follower} other {new followers}}",
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values: { n },
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});
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case "comments":
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return i18n._({
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id: "email.digest.count.comments",
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message: "{n, plural, one {comment} other {comments}}",
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values: { n },
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});
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case "mentions":
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return i18n._({
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id: "email.digest.count.mentions",
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message: "{n, plural, one {mention} other {mentions}}",
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values: { n },
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});
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case "likes":
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return i18n._({
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id: "email.digest.count.likes",
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message: "{n, plural, one {comment like} other {comment likes}}",
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values: { n },
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});
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case "playlistFollows":
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return i18n._({
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id: "email.digest.count.playlistFollows",
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message: "{n, plural, one {playlist follow} other {playlist follows}}",
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values: { n },
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});
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}
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}
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/**
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* Returns the sentence of a highlight, `who` and `target` already formatted
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* for the part it goes in (HTML or Markdown).
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*/
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function highlightSentence(
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kind: HighlightKind,
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who: string,
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target: string,
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): string {
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const values = { who, target };
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switch (kind) {
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case "mentionComment":
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return i18n._({
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id: "email.digest.hl.mentionComment",
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message: "{who} mentioned you in a comment on {target}",
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values,
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});
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case "mentionDump":
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case "mentionChat":
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return i18n._({
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id: "email.digest.hl.mentionIn",
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message: "{who} mentioned you in {target}",
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values,
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});
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case "mentionPlaylist":
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return i18n._({
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id: "email.digest.hl.mentionPlaylist",
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message: "{who} mentioned you in the playlist {target}",
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values,
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});
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case "comment":
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return i18n._({
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id: "email.digest.hl.comment",
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message: "{who} commented on your dump {target}",
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values,
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});
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case "playlistFollow":
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return i18n._({
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id: "email.digest.hl.playlistFollow",
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message: "{who} followed your playlist {target}",
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values,
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});
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case "userFollow":
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return i18n._({
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id: "email.digest.hl.userFollow",
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message: "{who} started following you",
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values,
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});
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case "commentLike":
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return i18n._({
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id: "email.digest.hl.commentLike",
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message: "{who} liked your comment on {target}",
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values,
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});
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}
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}
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const byLine = (username: string) =>
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i18n._({
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id: "email.digest.by",
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message: "by @{username}",
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values: { username },
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});
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const addedToLine = (playlist: string) =>
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i18n._({
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id: "email.digest.addedTo",
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message: "added to {playlist}",
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values: { playlist },
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});
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const uploadLabel = () =>
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i18n._({ id: "email.digest.upload", message: "upload" });
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const invitedLine = (inviter: string, reader: string) =>
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inviter === reader
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? i18n._({ id: "email.digest.invitedByYou", message: "invited by you" })
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: i18n._({
|
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id: "email.digest.invitedBy",
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message: "invited by @{username}",
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values: { username: inviter },
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});
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const andMoreLine = (n: number) =>
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i18n._({
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id: "email.digest.andMore",
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message: "and {n} more",
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values: { n },
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});
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const playlistMeta = (owner: string, n: number) =>
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i18n._({
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id: "email.digest.playlistMeta",
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message: "by @{username} · {n, plural, one {# dump} other {# dumps}}",
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values: { username: owner, n },
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});
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/**
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* Returns the digest `content` describes, written as Markdown and drawn in
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* `look`, with its subject and hidden preheader.
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*/
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export function renderDigestEmail(
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content: DigestContent,
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look: EmailLook,
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): RenderedEmail {
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const monthly = content.cadence === "monthly";
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const nf = new Intl.NumberFormat(EMAIL_LOCALE);
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const range = (year: boolean) =>
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new Intl.DateTimeFormat(
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EMAIL_LOCALE,
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year
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? { month: "short", day: "numeric", year: "numeric" }
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: { month: "short", day: "numeric" },
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).formatRange(content.from, content.to);
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const day = (d: Date) =>
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new Intl.DateTimeFormat(EMAIL_LOCALE, { weekday: "short" }).format(d);
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const figure = (n: number, label: string) =>
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`**${nf.format(n)}** ${escMd(label)}`;
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const yours = i18n._({ id: "email.digest.yours", message: "yours" });
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/** A dump as a list item: its thumbnail, title, pill and detail. */
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const dumpItem = (d: DigestDump, bullet: string, image = true) =>
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`${bullet} ${image && d.thumbnail ? ` ` : ""}${
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mdLink(d.title, d.url)
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}${d.mine ? ` *${escMd(yours)}*` : ""} · ${
|
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escMd(
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`${d.addedTo ? addedToLine(d.addedTo) : byLine(d.poster)}${
|
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d.addedTo ? "" : ` · ${d.domain ?? uploadLabel()}`
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} · ${nf.format(d.votes)} ${countLabel("upvotes", d.votes)} · ${
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nf.format(d.comments)
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} ${countLabel("comments", d.comments)}`,
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)
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}`;
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||||
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const md: string[] = [
|
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`*${
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escMd(
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`${
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monthly
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? i18n._({
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id: "digest.monthly",
|
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message: "Monthly recap",
|
||||
})
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: i18n._({
|
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id: "digest.weekly",
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message: "Weekly digest",
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||||
})
|
||||
} · ${range(true)}`,
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||||
)
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}*`,
|
||||
`# ${
|
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escMd(
|
||||
monthly
|
||||
? i18n._({
|
||||
id: "email.digest.monthly.title",
|
||||
message: "The month on {site}",
|
||||
values: { site: OG_SITE_NAME },
|
||||
})
|
||||
: i18n._({
|
||||
id: "email.digest.weekly.title",
|
||||
message: "Your week, {username}",
|
||||
values: { username: content.reader },
|
||||
}),
|
||||
)
|
||||
}`,
|
||||
];
|
||||
|
||||
const { activity, network, community } = content;
|
||||
if (activity) {
|
||||
md.push(
|
||||
`## ${escMd(i18n._({ id: "email.digest.forYou", message: "For you" }))}`,
|
||||
ACTIVITY_ORDER.filter((k) => (activity.counts[k] ?? 0) > 0)
|
||||
.map((k) =>
|
||||
figure(activity.counts[k]!, countLabel(k, activity.counts[k]!))
|
||||
)
|
||||
.join(" · "),
|
||||
activity.highlights.map((h) => {
|
||||
const target = h.kind === "mentionChat"
|
||||
? mdLink(
|
||||
i18n._({ id: "email.digest.theChat", message: "the chat" }),
|
||||
content.links.chat,
|
||||
)
|
||||
: h.target
|
||||
? mdLink(h.target.title, h.target.url)
|
||||
: "";
|
||||
const line = `- ${
|
||||
highlightSentence(h.kind, `**@${escMd(h.who)}**`, target)
|
||||
} *${escMd(day(h.at))}*`;
|
||||
return h.quote ? `${line}\n > ${escMd(h.quote)}` : line;
|
||||
}).join("\n"),
|
||||
`${
|
||||
mdLink(
|
||||
i18n._({
|
||||
id: "email.digest.seeAll",
|
||||
message:
|
||||
"{n, plural, one {See the notification} other {See all # notifications}}",
|
||||
values: { n: activity.total },
|
||||
}),
|
||||
content.links.notifications,
|
||||
)
|
||||
} →`,
|
||||
);
|
||||
}
|
||||
|
||||
if (network) {
|
||||
md.push(
|
||||
`## ${
|
||||
escMd(i18n._({
|
||||
id: "email.digest.network",
|
||||
message: "From people you follow",
|
||||
}))
|
||||
}`,
|
||||
network.dumps.map((d) => dumpItem(d, "-")).join("\n"),
|
||||
);
|
||||
if (network.more > 0) {
|
||||
md.push(`${
|
||||
mdLink(
|
||||
i18n._({
|
||||
id: "email.digest.more",
|
||||
message: "{n} more on your Followed feed",
|
||||
values: { n: network.more },
|
||||
}),
|
||||
content.links.followed,
|
||||
)
|
||||
} →`);
|
||||
}
|
||||
}
|
||||
|
||||
if (content.top.length > 0) {
|
||||
const [first] = content.top;
|
||||
md.push(
|
||||
`## ${
|
||||
escMd(
|
||||
monthly
|
||||
? i18n._({ id: "email.digest.topMonth", message: "Top this month" })
|
||||
: i18n._({ id: "email.digest.topWeek", message: "Top this week" }),
|
||||
)
|
||||
}`,
|
||||
);
|
||||
// The recap gives its first dump a wide image and the next two a thumbnail.
|
||||
if (monthly && first.thumbnail) md.push(``);
|
||||
md.push(
|
||||
content.top.map((d, i) =>
|
||||
dumpItem(d, `${i + 1}.`, monthly ? i === 1 || i === 2 : true)
|
||||
).join("\n"),
|
||||
);
|
||||
}
|
||||
|
||||
if (community) {
|
||||
const { dumps, upvotes, comments } = community.totals;
|
||||
md.push(
|
||||
`## ${
|
||||
escMd(i18n._({ id: "email.digest.community", message: "Community" }))
|
||||
}`,
|
||||
);
|
||||
if (monthly) {
|
||||
md.push(
|
||||
[
|
||||
figure(
|
||||
dumps,
|
||||
i18n._({
|
||||
id: "email.digest.stat.dumps",
|
||||
message: "{n, plural, one {dump} other {dumps}}",
|
||||
values: { n: dumps },
|
||||
}),
|
||||
),
|
||||
figure(upvotes, countLabel("upvotes", upvotes)),
|
||||
figure(comments, countLabel("comments", comments)),
|
||||
figure(
|
||||
community.chatMessages,
|
||||
i18n._({
|
||||
id: "email.digest.stat.chat",
|
||||
message: "{n, plural, one {chat message} other {chat messages}}",
|
||||
values: { n: community.chatMessages },
|
||||
}),
|
||||
),
|
||||
].join(" · "),
|
||||
);
|
||||
}
|
||||
if (community.members.length > 0) {
|
||||
md.push(
|
||||
`### ${
|
||||
escMd(
|
||||
i18n._({ id: "email.digest.newMembers", message: "New members" }),
|
||||
)
|
||||
}`,
|
||||
[
|
||||
...community.members.map((m) =>
|
||||
`- **@${escMd(m.username)}**${
|
||||
m.invitedBy
|
||||
? ` ${escMd(invitedLine(m.invitedBy, content.reader))}`
|
||||
: ""
|
||||
}`
|
||||
),
|
||||
...(community.membersMore > 0
|
||||
? [`- ${escMd(andMoreLine(community.membersMore))}`]
|
||||
: []),
|
||||
].join("\n"),
|
||||
);
|
||||
}
|
||||
if (community.playlists.length > 0) {
|
||||
md.push(
|
||||
`### ${
|
||||
escMd(i18n._({
|
||||
id: "email.digest.newPlaylists",
|
||||
message: "New public playlists",
|
||||
}))
|
||||
}`,
|
||||
[
|
||||
...community.playlists.map((p) =>
|
||||
`- ${mdLink(p.title, p.url)} · ${
|
||||
escMd(playlistMeta(p.owner, p.dumps))
|
||||
}`
|
||||
),
|
||||
...(community.playlistsMore > 0
|
||||
? [`- ${escMd(andMoreLine(community.playlistsMore))}`]
|
||||
: []),
|
||||
].join("\n"),
|
||||
);
|
||||
}
|
||||
if (!monthly && community.chatMessages > 0) {
|
||||
md.push(
|
||||
`### ${
|
||||
escMd(i18n._({ id: "email.digest.inChat", message: "In the chat" }))
|
||||
}`,
|
||||
`${
|
||||
escMd(i18n._({
|
||||
id: "email.digest.chatWeek",
|
||||
message:
|
||||
"{n, plural, one {# message this week} other {# messages this week}}",
|
||||
values: { n: community.chatMessages },
|
||||
}))
|
||||
} · ${
|
||||
mdLink(
|
||||
i18n._({ id: "email.digest.openChat", message: "Open the chat" }),
|
||||
content.links.chat,
|
||||
)
|
||||
}`,
|
||||
);
|
||||
}
|
||||
if (!monthly && dumps + upvotes + comments > 0) {
|
||||
md.push(`*${
|
||||
escMd(i18n._({
|
||||
id: "email.digest.totals",
|
||||
message:
|
||||
"{dumps, plural, one {# dump} other {# dumps}}, {upvotes, plural, one {# upvote} other {# upvotes}} and {comments, plural, one {# comment} other {# comments}}.",
|
||||
values: { dumps, upvotes, comments },
|
||||
}))
|
||||
}*`);
|
||||
}
|
||||
}
|
||||
|
||||
md.push(
|
||||
"---",
|
||||
escMd(
|
||||
monthly
|
||||
? i18n._({
|
||||
id: "email.digest.monthly.reason",
|
||||
message:
|
||||
"You're getting the monthly recap because it's on in your settings.",
|
||||
})
|
||||
: i18n._({
|
||||
id: "email.digest.weekly.reason",
|
||||
message:
|
||||
"You're getting the weekly digest because it's on in your settings.",
|
||||
}),
|
||||
),
|
||||
`${
|
||||
mdLink(
|
||||
monthly
|
||||
? i18n._({
|
||||
id: "digest.monthly.off",
|
||||
message: "Turn off monthly recaps",
|
||||
})
|
||||
: i18n._({
|
||||
id: "digest.weekly.off",
|
||||
message: "Turn off weekly digests",
|
||||
}),
|
||||
content.links.unsubscribe,
|
||||
)
|
||||
} · ${
|
||||
mdLink(
|
||||
i18n._({ id: "email.settings", message: "Settings" }),
|
||||
content.links.settings,
|
||||
)
|
||||
}`,
|
||||
);
|
||||
|
||||
return new EmailKit(look).render({
|
||||
subject: monthly
|
||||
? i18n._({
|
||||
id: "email.digest.monthly.subject",
|
||||
message: "The month on {site}, {range}",
|
||||
values: { site: OG_SITE_NAME, range: range(false) },
|
||||
})
|
||||
: i18n._({
|
||||
id: "email.digest.weekly.subject",
|
||||
message: "Your week on {site}, {range}",
|
||||
values: { site: OG_SITE_NAME, range: range(false) },
|
||||
}),
|
||||
preheader: preheader(content),
|
||||
markdown: md.join("\n\n"),
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the line an inbox shows beside the subject: the counts that make
|
||||
* the digest worth opening, at most three of them.
|
||||
*/
|
||||
function preheader(content: DigestContent): string {
|
||||
const parts: string[] = [];
|
||||
if (content.cadence === "weekly") {
|
||||
for (const k of ["upvotes", "followers", "comments"] as const) {
|
||||
const n = content.activity?.counts[k] ?? 0;
|
||||
if (n > 0) parts.push(`${n} ${countLabel(k, n)}`);
|
||||
}
|
||||
const n = (content.network?.dumps.length ?? 0) +
|
||||
(content.network?.more ?? 0);
|
||||
if (n > 0) {
|
||||
parts.push(i18n._({
|
||||
id: "email.digest.pre.network",
|
||||
message:
|
||||
"{n, plural, one {# new dump from people you follow} other {# new dumps from people you follow}}",
|
||||
values: { n },
|
||||
}));
|
||||
}
|
||||
} else {
|
||||
const members = (content.community?.members.length ?? 0) +
|
||||
(content.community?.membersMore ?? 0);
|
||||
const playlists = (content.community?.playlists.length ?? 0) +
|
||||
(content.community?.playlistsMore ?? 0);
|
||||
if (content.top.length > 0) {
|
||||
parts.push(i18n._({
|
||||
id: "email.digest.pre.topMonth",
|
||||
message:
|
||||
"{n, plural, one {the most upvoted dump of the month} other {the # most upvoted dumps of the month}}",
|
||||
values: { n: content.top.length },
|
||||
}));
|
||||
}
|
||||
if (members > 0) {
|
||||
parts.push(i18n._({
|
||||
id: "email.digest.pre.members",
|
||||
message: "{n, plural, one {# new member} other {# new members}}",
|
||||
values: { n: members },
|
||||
}));
|
||||
}
|
||||
if (playlists > 0) {
|
||||
parts.push(i18n._({
|
||||
id: "email.digest.pre.playlists",
|
||||
message: "{n, plural, one {# new playlist} other {# new playlists}}",
|
||||
values: { n: playlists },
|
||||
}));
|
||||
}
|
||||
}
|
||||
if (parts.length === 0 && content.top.length > 0) {
|
||||
parts.push(i18n._({
|
||||
id: "email.digest.pre.topWeek",
|
||||
message:
|
||||
"{n, plural, one {the most upvoted dump of the week} other {the # most upvoted dumps of the week}}",
|
||||
values: { n: content.top.length },
|
||||
}));
|
||||
}
|
||||
if (parts.length === 0) return "";
|
||||
const line = new Intl.ListFormat(EMAIL_LOCALE, { type: "conjunction" })
|
||||
.format(parts.slice(0, 3));
|
||||
return `${line.charAt(0).toUpperCase()}${line.slice(1)}.`;
|
||||
}
|
||||
Reference in New Issue
Block a user