87 lines
2.5 KiB
TypeScript
87 lines
2.5 KiB
TypeScript
/*
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* Copyright 2021 The Matrix.org Foundation C.I.C.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// TODO: These types should be elsewhere.
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export interface IEncryptedFile {
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url: string;
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key: {
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alg: string;
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key_ops: string[];
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kty: string;
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k: string;
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ext: boolean;
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};
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iv: string;
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hashes: {[alg: string]: string};
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v: string;
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}
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export interface IMediaEventContent {
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url?: string; // required on unencrypted media
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file?: IEncryptedFile; // required for *encrypted* media
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info?: {
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thumbnail_url?: string;
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thumbnail_file?: IEncryptedFile;
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};
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}
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export interface IPreparedMedia extends IMediaObject {
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thumbnail?: IMediaObject;
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}
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export interface IMediaObject {
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mxc: string;
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file?: IEncryptedFile;
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}
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/**
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* Parses an event content body into a prepared media object. This prepared media object
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* can be used with other functions to manipulate the media.
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* @param {IMediaEventContent} content Unredacted media event content. See interface.
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* @returns {IPreparedMedia} A prepared media object.
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* @throws Throws if the given content cannot be packaged into a prepared media object.
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*/
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export function prepEventContentAsMedia(content: IMediaEventContent): IPreparedMedia {
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let thumbnail: IMediaObject = null;
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if (content?.info?.thumbnail_url) {
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thumbnail = {
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mxc: content.info.thumbnail_url,
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file: content.info.thumbnail_file,
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};
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} else if (content?.info?.thumbnail_file?.url) {
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thumbnail = {
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mxc: content.info.thumbnail_file.url,
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file: content.info.thumbnail_file,
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};
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}
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if (content?.url) {
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return {
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thumbnail,
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mxc: content.url,
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file: content.file,
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};
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} else if (content?.file?.url) {
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return {
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thumbnail,
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mxc: content.file.url,
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file: content.file,
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};
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}
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throw new Error("Invalid file provided: cannot determine MXC URI. Has it been redacted?");
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}
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