76 lines
2.4 KiB
TypeScript
76 lines
2.4 KiB
TypeScript
/**
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* Turns the rows the comment service reads from `comments` into the {@link
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* Comment} the comment routes send.
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*
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* @module
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*/
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import type { SQLOutputValue } from "node:sqlite";
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import type { Comment } from "../../shared/comment.ts";
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/**
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* Returned by the comment service's `SELECT`s on `comments`, joined with
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* `users` for the `author_` columns.
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*/
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export interface CommentRow {
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id: string;
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dump_id: string;
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user_id: string;
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/** It is null on a top-level comment. */
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parent_id: string | null;
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body: string;
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created_at: string;
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updated_at: string | null;
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/**
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* 1 once deleted. The body is emptied but the row stays, so its replies keep
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* their place in the thread.
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*/
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deleted: number;
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like_count: number;
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author_username: string;
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author_avatar_mime: string | null;
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[key: string]: SQLOutputValue;
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}
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/** Checks whether a row `node:sqlite` returned is a {@link CommentRow}. */
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export function isCommentRow(
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obj: unknown,
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): obj is CommentRow {
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return !!obj && typeof obj === "object" &&
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"id" in obj && typeof obj.id === "string" &&
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"dump_id" in obj && typeof obj.dump_id === "string" &&
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"user_id" in obj && typeof obj.user_id === "string" &&
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"parent_id" in obj &&
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(typeof obj.parent_id === "string" || obj.parent_id === null) &&
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"body" in obj && typeof obj.body === "string" &&
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"created_at" in obj && typeof obj.created_at === "string" &&
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"updated_at" in obj &&
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(typeof obj.updated_at === "string" || obj.updated_at === null) &&
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"deleted" in obj && typeof obj.deleted === "number" &&
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"like_count" in obj && typeof obj.like_count === "number" &&
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"author_username" in obj && typeof obj.author_username === "string" &&
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"author_avatar_mime" in obj &&
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(typeof obj.author_avatar_mime === "string" ||
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obj.author_avatar_mime === null);
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}
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/**
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* Converts `row` to the {@link Comment} the comment routes send and the
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* WebSocket broadcasts.
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*/
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export function commentRowToApi(row: CommentRow): Comment {
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return {
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id: row.id,
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dumpId: row.dump_id,
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userId: row.user_id,
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parentId: row.parent_id ?? undefined,
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body: row.body,
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createdAt: new Date(row.created_at),
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updatedAt: row.updated_at ? new Date(row.updated_at) : undefined,
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deleted: Boolean(row.deleted),
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likeCount: row.like_count,
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authorUsername: row.author_username,
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authorAvatarMime: row.author_avatar_mime ?? undefined,
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};
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}
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