index-compiled.js.map

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* Created by solvek on 08.02.16.\n */\n\n\"use strict\";\n\nvar fs = require('fs');\n\nvar http = require(\"http\");\nvar urlParse = require(\"url\").parse;\n\nvar m3u = require('m3ujs');\n\nclass Pled{\n    /**\n     * @param {Object|string[]} options Pled options object or array of sources\n     * @param {string[]} options.sources Sources of m3u files. Each source is either a path\n     * to local file of a url to an http file (starting from \"http://\" or \"https://\")\n     * @param {FilterFunction[]} [options.filters] Sequence of filters\n     * @param {string} [options.cachePath] Path to cache file\n     * @param {int} [options.cacheTime=5*24*60*60*1000] Time for cache in milliseconds. By default 5 days\n     * to not use the cache but regenerate content (however resulting content still can be saved to the cache)\n     */\n    constructor(options){\n        if (Array.isArray(options)){\n            options = {sources: options};\n        }\n\n        if (!options.cacheTime){\n            options.cacheTime = 5*24*60*60*1000;\n        }\n\n        if (!options.filters){\n            options.filters = [];\n        }\n\n        this.options = options;\n    }\n\n    /**\n     * @name FilterFunction\n     * @function\n     * @param {Object} stream Stream object\n     * @param {string} [source] Source\n     * @param {Object[]} [collected] Already collected streams for result\n     * @return Either modified Stream Object of undefined. Undefined means that the stream should not be outputted in result.\n     */\n\n    /**\n     * It is possible to use Pled in pair with [Express.js]{@link http://expressjs.com/}. Handles HTTP request.\n     * Query string can have \"force=true\" (or request.query.force true) query parameter. This allows to force reload data (ignoring cache)\n     * See `samples` directory for an example.\n     */\n    handleRequest(request, response){\n        let loader = (request.query && request.query.force) ? this.executeNoCache : this.execute;\n\n        loader.call(this)\n            .then(content =>{\n                //console.log(`Received content: ${content}`);\n                //response.status(200);\n                response.setHeader('Content-type', 'audio/x-mpegurl');\n                response.setHeader(\"Content-Disposition\", \"attachment;filename=playlist.m3u\");\n                response.charset = 'UTF-8';\n                response.write(content);\n                response.end();\n            })\n            .catch(error => {\n                response.status(500);\n                response.send(\"Failed to generate the playlist.m3u. Error: \"+error.message);\n            });\n    }\n\n    /**\n     * Processes play list sources and generates resulting playlist as string\n     * If up to date cache content is available then cache will be returned without reloading\n     * @returns {Promise<string>} Promise with a string value - content of m3u\n     */\n    execute(){\n        if (!this.options.cachePath){\n            return this.executeNoCache();\n        }\n\n        let obj = this;\n\n        return this.loadCache()\n            .then(cache => {\n                if (cache.status == Pled.CACHE_STATUS_OK){\n                    return cache.content;\n                }\n\n                return obj.executeNoCache();\n            });\n    }\n\n    /**\n     * Creates content from sources omitting cache\n     * @returns {Promise<string>} Promise with a string value - content of m3u\n     */\n    executeNoCache(){\n        let obj = this;\n        return this._handleSourceTail(0, {tracks: []})\n            .then(result => {\n                let content = m3u.format(result);\n                if (obj.options.cachePath){\n                    return obj.saveCache(content);\n                }\n                return content;\n            });\n    }\n\n    /**\n     * @typedef CacheStatus\n     * @type Object\n     * @property {Symbol} status Cache status: CACHE_STATUS_OK, CACHE_STATUS_MISSING, CACHE_STATUS_OUTDATED\n     * @property {string} [content] Optional content. Specified only if cache status is CACHE_STATUS_OK\n     */\n\n    /**\n     * Loads playlist from cache file.\n     * @returns {Promise<CacheStatus>}\n     */\n    loadCache(){\n        let options = this.options;\n\n        if (!options.cachePath){\n            return Promise.reject(new Error(\"Path to cache file not specified\"));\n        }\n\n        return new Promise(function (resolve) {\n            fs.stat(options.cachePath, (err, stat) => {\n                if (err){\n                    resolve({status : Pled.CACHE_STATUS_MISSING});\n                    return;\n                }\n\n                let now = new Date();\n                let age = now - stat.mtime;\n\n                //console.log(`Cache time: ${options.cacheTime}, now: ${now}, file time: ${stat.mtime}, age: ${age}`);\n\n                if (age > options.cacheTime){\n                    resolve({status : Pled.CACHE_STATUS_OUTDATED});\n                    return;\n                }\n\n                resolve(Pled.loadLocal(options.cachePath)\n                    .then(content => {\n                        return {status: Pled.CACHE_STATUS_OK, content: content};\n                    }));\n            });\n        });\n    }\n\n    saveCache(content){\n        let obj = this;\n        return new Promise(\n            function(resolve, reject){\n                fs.writeFile(obj.options.cachePath, content, err => {\n                    if (err) {\n                        reject(err);\n                    }\n                    else {\n                        resolve(content);\n                    }\n                });\n            });\n    }\n\n    _handleSourceTail(sourceIdx, result){\n        if (sourceIdx >= this.options.sources.length){\n            return result;\n        }\n\n        let source = this.options.sources[sourceIdx];\n        let obj = this;\n\n        return this._handleSource(source, result)\n            .then(function(){\n                return obj._handleSourceTail(sourceIdx+1, result);\n            });\n    }\n\n    _handleSource(source, result){\n        let filters = this.options.filters;\n\n        return Pled.loadSource(source)\n         .then(content => {\n                let parsed = m3u.parse(content);\n                var filter;\n\n                parsed.tracks.forEach(track => {\n                    for(var idx in filters){\n                        filter = filters[idx];\n\n                        track = filter(track, source, result);\n\n                        if (!track) break;\n                    }\n\n                    if (track){\n                        result.tracks.push(track);\n                    }\n                });\n            });\n    }\n\n    static loadLocal(path){\n        return new Promise(\n            function(resolve, reject) {\n                fs.readFile(path, 'utf8', (err, data) => {\n                    if (err) {\n                        reject(err);\n                    }\n                    else {\n                        resolve(data);\n                    }\n                });\n            });\n    }\n\n    static loadRemote(url){\n        return new Promise(\n            function(resolve, reject){\n                var req = http.get(urlParse(url), function (res) {\n                    if (res.statusCode !== 200) {\n                        reject(new Error(\"Http returned status: \"+req.statusCode));\n                        return;\n                    }\n\n                    var data = '';\n\n                    res.on('data', function (chunk) {\n                        data += chunk;\n                    });\n                    res.on('end', function () {\n                        resolve(data);\n                    });\n                });\n\n                req.on('error', function (e) {\n                    reject(e);\n                });\n                req.end();\n            }\n        );\n    }\n\n    static loadSource(url){\n        if (url.startsWith('http://')||url.startsWith('http://')){\n            return Pled.loadRemote(url);\n        }\n\n        return Pled.loadLocal(url);\n    }\n}\n\nPled.CACHE_STATUS_OK = Symbol();\nPled.CACHE_STATUS_MISSING = Symbol();\nPled.CACHE_STATUS_OUTDATED = Symbol();\n\nPled.filters = require('./filters');\n\nmodule.exports = Pled;"]}