addon.js

const { addonBuilder } = require("stremio-addon-sdk");
const magnet = require("magnet-uri");

const manifest = { 
    "id": "org.stremio.helloworld",
    "version": "1.0.0",

    "name": "Hello World Addon",
    "description": "Sample addon providing a few public domain movies",

    // set what type of resources we will return
    "resources": [
        "catalog",
        "stream"
    ],

    "types": ["movie", "series"], // your add-on will be preferred for those content types

    // set catalogs, we'll be making 2 catalogs in this case, 1 for movies and 1 for series
    "catalogs": [
        {
            type: 'movie',
            id: 'helloworldmovies'
        },
        {
            type: 'series',
            id: 'helloworldseries'
        }
    ],

    // prefix of item IDs (ie: "tt0032138")
    "idPrefixes": [ "tt" ]

};

const dataset = {
    // fileIdx is the index of the file within the torrent ; if not passed, the largest file will be selected
    "tt0032138": { name: "The Wizard of Oz", type: "movie", infoHash: "24c8802e2624e17d46cd555f364debd949f2c81e", fileIdx: 0 },
    "tt0017136": { name: "Metropolis", type: "movie", infoHash: "dca926c0328bb54d209d82dc8a2f391617b47d7a", fileIdx: 1 },

    // night of the living dead, example from magnet
    "tt0063350": fromMagnet("Night of the Living Dead", "movie", "magnet:?xt=urn:btih:A7CFBB7840A8B67FD735AC73A373302D14A7CDC9&dn=night+of+the+living+dead+1968+remastered+bdrip+1080p+ita+eng+x265+nahom&tr=udp%3A%2F%2Ftracker.publicbt.com%2Fannounce&tr=udp%3A%2F%2Fglotorrents.pw%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.openbittorrent.com%3A80%2Fannounce"),
    "tt0051744": { name: "House on Haunted Hill", type: "movie", infoHash: "9f86563ce2ed86bbfedd5d3e9f4e55aedd660960" },

    "tt1254207": { name: "Big Buck Bunny", type: "movie", url: "http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4" }, // HTTP stream
    "tt0031051": { name: "The Arizona Kid", type: "movie", ytId: "m3BKVSpP80s" }, // YouTube stream

    "tt0137523": { name: "Fight Club", type: "movie", externalUrl: "https://www.netflix.com/watch/26004747" }, // redirects to Netflix

    "tt1748166:1:1": { name: "Pioneer One", type: "series", infoHash: "07a9de9750158471c3302e4e95edb1107f980fa6" }, // torrent for season 1, episode 1
};

// utility function to add from magnet
function fromMagnet(name, type, uri) {
    const parsed = magnet.decode(uri);
    const infoHash = parsed.infoHash.toLowerCase();
    const tags = [];
    if (uri.match(/720p/i)) tags.push("720p");
    if (uri.match(/1080p/i)) tags.push("1080p");
    return {
        name: name,
        type: type,
        infoHash: infoHash,
        sources: (parsed.announce || []).map(function(x) { return "tracker:"+x }).concat(["dht:"+infoHash]),
        tag: tags,
        title: tags[0], // show quality in the UI
    }
}

const builder = new addonBuilder(manifest);

// Streams handler
builder.defineStreamHandler(function(args) {
    if (dataset[args.id]) {
        return Promise.resolve({ streams: [dataset[args.id]] });
    } else {
        return Promise.resolve({ streams: [] });
    }
})

const METAHUB_URL = "https://images.metahub.space"

const generateMetaPreview = function(value, key) {
    // To provide basic meta for our movies for the catalog
    // we'll fetch the poster from Stremio's MetaHub
    // see https://github.com/Stremio/stremio-addon-sdk/blob/master/docs/api/responses/meta.md#meta-preview-object
    const imdbId = key.split(":")[0]
    return {
        id: imdbId,
        type: value.type,
        name: value.name,
        poster: METAHUB_URL+"/poster/medium/"+imdbId+"/img",
    }
}

builder.defineCatalogHandler(function(args, cb) {
    // filter the dataset object and only take the requested type
    const metas = Object.entries(dataset)
	.filter(([_, value]) => value.type === args.type)
	.map(([key, value]) => generateMetaPreview(value, key))

    return Promise.resolve({ metas: metas })
})

module.exports = builder.getInterface()