85 lines
2.7 KiB
TypeScript
85 lines
2.7 KiB
TypeScript
/**
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* Checks the playlist request bodies, for the playlist routes to answer a 400.
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*
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* @module
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*/
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import type {
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CreatePlaylistRequest,
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ReorderPlaylistRequest,
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UpdatePlaylistRequest,
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} from "../../shared/playlist.ts";
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import { VALIDATION } from "../../shared/validation.ts";
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/** Checks that `title` isn't blank and, trimmed, fits the limit. */
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function isValidTitle(title: string): boolean {
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const trimmed = title.trim();
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return trimmed.length > 0 && trimmed.length <= VALIDATION.PLAYLIST_TITLE_MAX;
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}
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/**
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* Checks whether `obj` is a {@link CreatePlaylistRequest} with a title that
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* isn't blank, and a title and description within the `VALIDATION` limits. A
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* null description passes.
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*/
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export function isCreatePlaylistRequest(
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obj: unknown,
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): obj is CreatePlaylistRequest {
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if (
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!obj || typeof obj !== "object" ||
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!("title" in obj) || typeof obj.title !== "string" ||
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!("isPublic" in obj) || typeof obj.isPublic !== "boolean"
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) return false;
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const o = obj as Record<string, unknown>;
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if (!isValidTitle(o.title as string)) return false;
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if (
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"description" in o && typeof o.description !== "string" &&
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o.description !== null
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) return false;
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if (
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typeof o.description === "string" &&
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(o.description as string).length > VALIDATION.PLAYLIST_DESCRIPTION_MAX
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) return false;
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return true;
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}
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/**
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* Checks whether `obj` is an {@link UpdatePlaylistRequest} whose title, if
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* given, isn't blank, with a title and description within the `VALIDATION`
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* limits.
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*/
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export function isUpdatePlaylistRequest(
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obj: unknown,
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): obj is UpdatePlaylistRequest {
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if (!obj || typeof obj !== "object") return false;
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const o = obj as Record<string, unknown>;
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// Its format is changeSlug's check, which says what is wrong.
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if ("slug" in o && typeof o.slug !== "string") return false;
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if ("title" in o) {
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if (typeof o.title !== "string") return false;
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if (!isValidTitle(o.title as string)) return false;
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}
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if (
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"description" in o && typeof o.description !== "string" &&
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o.description !== null
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) return false;
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if (
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typeof o.description === "string" &&
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(o.description as string).length > VALIDATION.PLAYLIST_DESCRIPTION_MAX
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) return false;
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if ("isPublic" in o && typeof o.isPublic !== "boolean") return false;
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return true;
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}
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/**
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* Checks whether `obj` is a {@link ReorderPlaylistRequest}. Whether its ids
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* match the playlist is `reorderPlaylist`'s to check.
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*/
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export function isReorderPlaylistRequest(
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obj: unknown,
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): obj is ReorderPlaylistRequest {
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return !!obj && typeof obj === "object" &&
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"dumpIds" in obj && Array.isArray(obj.dumpIds) &&
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(obj.dumpIds as unknown[]).every((id) => typeof id === "string");
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}
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