81 lines
3.3 KiB
TypeScript
81 lines
3.3 KiB
TypeScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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import {encodeQueryParams} from "./common";
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import {decryptAttachment} from "../e2ee/attachment.js";
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import {Platform} from "../../platform/web/Platform.js";
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import {BlobHandle} from "../../platform/web/dom/BlobHandle.js";
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import type {Attachment, EncryptedFile} from "./types/response";
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export class MediaRepository {
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private readonly _homeserver: string;
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private readonly _platform: Platform;
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constructor({homeserver, platform}: {homeserver:string, platform: Platform}) {
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this._homeserver = homeserver;
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this._platform = platform;
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}
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mxcUrlThumbnail(url: string, width: number, height: number, method: "crop" | "scale"): string | undefined {
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const parts = this._parseMxcUrl(url);
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if (parts) {
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const [serverName, mediaId] = parts;
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const httpUrl = `${this._homeserver}/_matrix/media/r0/thumbnail/${encodeURIComponent(serverName)}/${encodeURIComponent(mediaId)}`;
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return httpUrl + "?" + encodeQueryParams({width: Math.round(width), height: Math.round(height), method});
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}
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return undefined;
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}
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mxcUrl(url: string): string | undefined {
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const parts = this._parseMxcUrl(url);
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if (parts) {
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const [serverName, mediaId] = parts;
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return `${this._homeserver}/_matrix/media/r0/download/${encodeURIComponent(serverName)}/${encodeURIComponent(mediaId)}`;
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}
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return undefined;
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}
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private _parseMxcUrl(url: string): string[] | undefined {
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const prefix = "mxc://";
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if (url.startsWith(prefix)) {
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return url.substr(prefix.length).split("/", 2);
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} else {
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return undefined;
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}
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}
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async downloadEncryptedFile(fileEntry: EncryptedFile, cache: boolean = false): Promise<BlobHandle> {
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const url = this.mxcUrl(fileEntry.url);
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const {body: encryptedBuffer} = await this._platform.request(url, {method: "GET", format: "buffer", cache}).response();
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const decryptedBuffer = await decryptAttachment(this._platform, encryptedBuffer, fileEntry);
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return this._platform.createBlob(decryptedBuffer, fileEntry.mimetype);
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}
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async downloadPlaintextFile(mxcUrl: string, mimetype: string, cache: boolean = false): Promise<BlobHandle> {
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const url = this.mxcUrl(mxcUrl);
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const {body: buffer} = await this._platform.request(url, {method: "GET", format: "buffer", cache}).response();
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return this._platform.createBlob(buffer, mimetype);
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}
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async downloadAttachment(content: Attachment, cache: boolean = false): Promise<BlobHandle> {
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if (content.file) {
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return this.downloadEncryptedFile(content.file, cache);
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} else {
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return this.downloadPlaintextFile(content.url!, content.info?.mimetype, cache);
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}
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}
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}
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