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import { uint8ArrayToString } from "../binary.js";
import { debounce } from "../debounce.js";
const MIME_TYPE = "application/vnd.jsbeeb.disc-image";
const CLIENT_ID = "356883185894-bhim19837nroivv18p0j25gecora60r5.apps.googleusercontent.com";
const SCOPES = "https://www.googleapis.com/auth/drive.file";
const DISCOVERY_DOC = "https://www.googleapis.com/discovery/v1/apis/drive/v3/rest";
const FILE_FIELDS = "id,name,capabilities";
const PARENT_FOLDER_NAME = "jsbeeb disc images";
const boundary = "-------314159265358979323846";
const delimiter = `\r\n--${boundary}\r\n`;
const close_delim = `\r\n--${boundary}--`;
const FOLDER_MIME_TYPE = "application/vnd.google-apps.folder";
export class GoogleDriveLoader {
constructor() {
this.authorized = false;
this.parentFolderId = undefined;
this.driveClient = undefined;
}
initialise() {
if (!this._initialising) {
this._initialising = this._initialise().catch((error) => {
this._initialising = undefined;
throw error;
});
}
return this._initialising;
}
async _initialise() {
await this._loadScript("https://apis.google.com/js/api.js");
this.gapi = window.gapi;
await this._loadScript("https://accounts.google.com/gsi/client");
this.tokenClient = window.google.accounts.oauth2.initTokenClient({
client_id: CLIENT_ID,
scope: SCOPES,
error_callback: "", // defined later
callback: "", // defined later
});
await this.gapi.load("client", async () => {
await this.gapi.client.init({ discoveryDocs: [DISCOVERY_DOC] });
this.driveClient = this.gapi.client.drive;
});
return true;
}
_loadScript(src) {
// https://github.com/google/google-api-javascript-client/issues/319
return new Promise((resolve, reject) => {
const script = document.createElement("script");
script.src = src;
script.onload = resolve;
script.onerror = () => reject(new Error(`Failed to fetch ${src}; a browser extension may be blocking it`));
document.body.appendChild(script);
});
}
authorize(imm) {
Iif (this.authorized) return true;
Iif (imm) return false;
return new Promise((resolve, reject) => {
this.tokenClient.callback = (resp) => {
Eif (resp.error !== undefined) return reject(new Error(resp.error_description ?? resp.error));
this.authorized = true;
resolve(true);
};
this.tokenClient.error_callback = (resp) => {
reject(new Error(`Token client failure: ${resp.type}; failed to authorize`));
};
this.tokenClient.requestAccessToken({ select_account: false });
});
}
async listFiles() {
const query = {
q: `mimeType = '${MIME_TYPE}' and trashed = false`,
fields: `nextPageToken, files(${FILE_FIELDS})`,
};
let response = await this.driveClient.files.list(query);
let result = response.result.files;
while (response.result.nextPageToken) {
response = await this.driveClient.files.list({ ...query, pageToken: response.result.nextPageToken });
result = result.concat(response.result.files);
}
return result;
}
async _findOrCreateParentFolder() {
const list = await this.driveClient.files.list({
q: `name = '${PARENT_FOLDER_NAME}' and mimeType = '${FOLDER_MIME_TYPE}' and trashed = false`,
corpora: "user",
});
if (list.result.files.length === 1) {
return list.result.files[0].id;
}
const file = await this.driveClient.files.create({
resource: { name: PARENT_FOLDER_NAME, mimeType: FOLDER_MIME_TYPE },
fields: "id",
});
return file.result.id;
}
async saveFile(name, data, idOrNone) {
Iif (this.parentFolderId === undefined) {
this.parentFolderId = await this._findOrCreateParentFolder();
}
const metadata = { name, mimeType: MIME_TYPE };
if (!idOrNone) metadata.parents = [this.parentFolderId];
const base64Data = btoa(uint8ArrayToString(data));
const multipartRequestBody =
`${delimiter}Content-Type: application/json\r\n\r\n` +
`${JSON.stringify(metadata)}${delimiter}` +
`Content-Type: ${MIME_TYPE}\r\nContent-Transfer-Encoding: base64\r\n\r\n` +
`${base64Data}${close_delim}`;
return this.gapi.client.request({
path: `/upload/drive/v3/files${idOrNone ? `/${idOrNone}` : ""}`,
method: idOrNone ? "PATCH" : "POST",
params: { uploadType: "multipart", newRevision: false, fields: FILE_FIELDS },
headers: { "Content-Type": `multipart/mixed; boundary="${boundary}"` },
body: multipartRequestBody,
});
}
/**
* @param {function(Error): void} onSaveError - called the first time a change cannot be saved
*/
async create(name, data, layout, onSaveError) {
const response = await this.saveFile(name, data);
const meta = response.result;
return { fileId: meta.id, disc: this.makeDisc(data, meta, layout, onSaveError) };
}
makeDisc(data, meta, layout, onSaveError) {
let flusher = null;
const name = meta.name;
const id = meta.id;
Eif (meta.capabilities.canEdit) {
let reportedSaveError = false;
flusher = debounce(async (changedData) => {
try {
await this.saveFile(name, changedData, id);
} catch (error) {
if (reportedSaveError) return;
reportedSaveError = true;
// The Drive client rejects with its response, not an Error.
onSaveError(
error instanceof Error
? error
: new Error(error?.result?.error?.message ?? "the request to Google Drive failed"),
);
}
}, 200);
}
return discFor(name, data, flusher, layout);
}
/**
* @param {function(Error): void} onSaveError - called the first time a change cannot be saved
*/
async load(fileId, layout, onSaveError) {
const meta = (await this.driveClient.files.get({ fileId, fields: FILE_FIELDS })).result;
const data = (await this.driveClient.files.get({ fileId, alt: "media" })).body;
return this.makeDisc(data, meta, layout, onSaveError);
}
}
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