api: move request functions to separate file

- request status id is no longer a cryptic number
- descriptive function names

src/modules/sub/utils.js

@@ -1,58 +1,5 @@
-import { normalizeURL } from "../processing/url.js";
-import { createStream } from "../stream/manage.js";
-import ipaddr from "ipaddr.js";
-
-const apiVar = {
-    allowed: {
-        vCodec: ["h264", "av1", "vp9"],
-        vQuality: ["max", "4320", "2160", "1440", "1080", "720", "480", "360", "240", "144"],
-        aFormat: ["best", "mp3", "ogg", "wav", "opus"],
-        filenamePattern: ["classic", "pretty", "basic", "nerdy"]
-    },
-    booleanOnly: [
-        "isAudioOnly",
-        "isTTFullAudio",
-        "isAudioMuted",
-        "dubLang",
-        "disableMetadata",
-        "twitterGif",
-        "tiktokH265"
-    ]
-}
 const forbiddenCharsString = ['}', '{', '%', '>', '<', '^', ';', '`', '$', '"', "@", '='];
 
-export function apiJSON(type, obj) {
-    try {
-        switch (type) {
-            case 0:
-                return { status: 400, body: { status: "error", text: obj.t } };
-            case 1:
-                return { status: 200, body: { status: "redirect", url: obj.u } };
-            case 2:
-                return { status: 200, body: { status: "stream", url: createStream(obj) } };
-            case 3:
-                return { status: 200, body: { status: "success", text: obj.t } };
-            case 4:
-                return { status: 429, body: { status: "rate-limit", text: obj.t } };
-            case 5:
-                let pickerType = "various", audio = false
-                switch (obj.service) {
-                    case "douyin":
-                    case "tiktok":
-                        audio = obj.u
-                        pickerType = "images"
-                        break;
-                }
-                return { status: 200, body: { status: "picker", pickerType: pickerType, picker: obj.picker, audio: audio } };
-            case 6: // critical error, action should be taken by balancer/other server software
-                return { status: 500, body: { status: "error", text: obj.t, critical: true } };
-            default:
-                return { status: 400, body: { status: "error", text: "Bad Request" } };
-        }
-    } catch (e) {
-        return { status: 500, body: { status: "error", text: "Internal Server Error", critical: true } };
-    }
-}
 export function metadataManager(obj) {
     let keys = Object.keys(obj);
     let tags = ["album", "composer", "genre", "copyright", "encoded_by", "title", "language", "artist", "album_artist", "performer", "disc", "publisher", "track", "encoder", "compilation", "date", "creation_time", "comment"]
@@ -79,57 +26,6 @@ export function unicodeDecode(str) {
         return String.fromCharCode(parseInt(unicode.replace(/\\u/g, ""), 16));
     });
 }
-export function checkJSONPost(obj) {
-    let def = {
-        url: normalizeURL(decodeURIComponent(obj.url)),
-        vCodec: "h264",
-        vQuality: "720",
-        aFormat: "mp3",
-        filenamePattern: "classic",
-        isAudioOnly: false,
-        isTTFullAudio: false,
-        isAudioMuted: false,
-        disableMetadata: false,
-        dubLang: false,
-        twitterGif: false,
-        tiktokH265: false
-    }
-    try {
-        let objKeys = Object.keys(obj);
-        let defKeys = Object.keys(def);
-        if (objKeys.length > defKeys.length + 1 || !obj.url) return false;
-
-        for (let i in objKeys) {
-            if (String(objKeys[i]) !== "url" && defKeys.includes(objKeys[i])) {
-                if (apiVar.booleanOnly.includes(objKeys[i])) {
-                    def[objKeys[i]] = obj[objKeys[i]] ? true : false;
-                } else {
-                    if (apiVar.allowed[objKeys[i]] && apiVar.allowed[objKeys[i]].includes(obj[objKeys[i]])) def[objKeys[i]] = String(obj[objKeys[i]])
-                }
-            }
-        }
-
-        if (def.dubLang)
-            def.dubLang = verifyLanguageCode(obj.dubLang);
-
-        return def
-    } catch (e) {
-        return false
-    }
-}
-export function getIP(req) {
-    const strippedIP = req.ip.replace(/^::ffff:/, '');
-    const ip = ipaddr.parse(strippedIP);
-    if (ip.kind() === 'ipv4') {
-        return strippedIP;
-    }
-
-    const prefix = 56;
-    const v6Bytes = ip.toByteArray();
-          v6Bytes.fill(0, prefix / 8);
-
-    return ipaddr.fromByteArray(v6Bytes).toString();
-}
 export function cleanHTML(html) {
     let clean = html.replace(/ {4}/g, '');
     clean = clean.replace(/\n/g, '');