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Utils.ts
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Utils.ts
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import { ApiClient } from './ApiClient';
import { ERROR_CODE } from './Errors';
import { logger } from './Logger';
import { Session } from './Types';
import { AxiosResponse } from 'axios';
import { execSync } from 'child_process';
import fs from 'fs';
async function extractGuids(url: string, client: ApiClient): Promise<Array<string> | null> {
const videoRegex = new RegExp(/https:\/\/.*\/video\/(\w{8}-(?:\w{4}-){3}\w{12})/);
const groupRegex = new RegExp(/https:\/\/.*\/group\/(\w{8}-(?:\w{4}-){3}\w{12})/);
const videoMatch: RegExpExecArray | null = videoRegex.exec(url);
const groupMatch: RegExpExecArray | null = groupRegex.exec(url);
if (videoMatch) {
return [videoMatch[1]];
}
else if (groupMatch) {
const videoNumber: number = await client.callApi(`groups/${groupMatch[1]}`, 'get')
.then((response: AxiosResponse<any> | undefined) => response?.data.metrics.videos);
const result: Array<string> = [];
// Anything above $top=100 results in 400 Bad Request
// Use $skip to skip the first 100 and get another 100 and so on
for (let index = 0; index <= Math.floor(videoNumber / 100); index++) {
const partial: Array<string> = await client.callApi(
`groups/${groupMatch[1]}/videos?$skip=${100 * index}&` +
'$top=100&$orderby=publishedDate asc', 'get')
.then(
(response: AxiosResponse<any> | undefined) =>
response?.data.value.map((item: any) => item.id)
);
result.push(...partial);
}
return result;
}
return null;
}
/**
* Parse the list of url given by the user via console input.
* They can either be video urls or group urls, in which case the guids
* will be added from oldest to newest.
*
* @param {Array<string>} urlList list of link to parse
* @param {string} defaultOutDir the directry used to save the videos
* @param {Session} session used to call the API to get the GUIDs from group links
*
* @returns Array of 2 elements, 1st one being the GUIDs array, 2nd one the output directories array
*/
export async function parseCLIinput(urlList: Array<string>, defaultOutDir: string,
session: Session): Promise<Array<Array<string>>> {
const apiClient: ApiClient = ApiClient.getInstance(session);
const guidList: Array<string> = [];
for (const url of urlList) {
const guids: Array<string> | null = await extractGuids(url, apiClient);
if (guids) {
guidList.push(...guids);
}
else {
logger.warn(`Invalid url '${url}', skipping..`);
}
}
const outDirList: Array<string> = Array(guidList.length).fill(defaultOutDir);
return [guidList, outDirList];
}
/**
* Parse the input text file.
* The urls in the file can either be video urls or group urls, in which case the guids
* will be added from oldest to newest.
*
* @param {string} inputFile path to the text file
* @param {string} defaultOutDir the default/fallback directory used to save the videos
* @param {Session} session used to call the API to get the GUIDs from group links
*
* @returns Array of 2 elements, 1st one being the GUIDs array, 2nd one the output directories array
*/
export async function parseInputFile(inputFile: string, defaultOutDir: string,
session: Session): Promise<Array<Array<string>>> {
// rawContent is a list of each line of the file
const rawContent: Array<string> = fs.readFileSync(inputFile).toString()
.split(/\r?\n/);
const apiClient: ApiClient = ApiClient.getInstance(session);
const guidList: Array<string> = [];
const outDirList: Array<string> = [];
// if the last line was an url set this
let foundUrl = false;
for (let i = 0; i < rawContent.length; i++) {
const line: string = rawContent[i];
// filter out lines with no content
if (!line.match(/\S/)) {
logger.warn(`Line ${i + 1} is empty, skipping..`);
continue;
}
// parse if line is option
else if (line.includes('-dir')) {
if (foundUrl) {
const outDir: string | null = parseOption('-dir', line);
if (outDir && checkOutDir(outDir)) {
outDirList.push(...Array(guidList.length - outDirList.length)
.fill(outDir));
}
else {
outDirList.push(...Array(guidList.length - outDirList.length)
.fill(defaultOutDir));
}
foundUrl = false;
continue;
}
else {
logger.warn(`Found options without preceding url at line ${i + 1}, skipping..`);
continue;
}
}
/* now line is not empty nor an option line.
If foundUrl is still true last line didn't have a directory option
so we stil need to add the default outDir to outDirList to */
if (foundUrl) {
outDirList.push(...Array(guidList.length - outDirList.length)
.fill(defaultOutDir));
foundUrl = false;
}
const guids: Array<string> | null = await extractGuids(line, apiClient);
if (guids) {
guidList.push(...guids);
foundUrl = true;
}
else {
logger.warn(`Invalid url at line ${i + 1}, skipping..`);
}
}
// if foundUrl is still true after the loop we have some url without an outDir
if (foundUrl) {
outDirList.push(...Array(guidList.length - outDirList.length)
.fill(defaultOutDir));
}
return [guidList, outDirList];
}
// This leaves us the option to add more options (badum tss) _Luca
function parseOption(optionSyntax: string, item: string): string | null {
const match: RegExpMatchArray | null = item.match(
RegExp(`^\\s*${optionSyntax}\\s?=\\s?['"](.*)['"]`)
);
return match ? match[1] : null;
}
export function checkOutDir(directory: string): boolean {
if (!fs.existsSync(directory)) {
try {
fs.mkdirSync(directory);
logger.info('\nCreated directory: '.yellow + directory);
}
catch (e) {
logger.warn('Cannot create directory: ' + directory +
'\nFalling back to default directory..');
return false;
}
}
return true;
}
export function checkRequirements(): void {
try {
const copyrightYearRe = new RegExp(/\d{4}-(\d{4})/);
const ffmpegVer: string = execSync('ffmpeg -version').toString().split('\n')[0];
if (parseInt(copyrightYearRe.exec(ffmpegVer)?.[1] ?? '0') <= 2019) {
process.exit(ERROR_CODE.OUTDATED_FFMPEG);
}
logger.verbose(`Using ${ffmpegVer}\n`);
}
catch (e) {
process.exit(ERROR_CODE.MISSING_FFMPEG);
}
}
export function ffmpegTimemarkToChunk(timemark: string): number {
const timeVals: Array<string> = timemark.split(':');
const hrs: number = parseInt(timeVals[0]);
const mins: number = parseInt(timeVals[1]);
const secs: number = parseInt(timeVals[2]);
return (hrs * 60) + mins + (secs / 60);
}