From 760980032a4aa258083cef03afd7a92a1b1aa1ce Mon Sep 17 00:00:00 2001
From: Steve Berdy <86739818+steveberdy@users.noreply.github.com>
Date: Thu, 18 Jan 2024 10:13:03 -0500
Subject: [PATCH] support for bandcamp

---
 README.md                                     |  1 +
 package.json                                  |  1 +
 src/modules/processing/match.js               |  7 +++++
 src/modules/processing/services/bandcamp.js   | 29 +++++++++++++++++++
 src/modules/processing/servicesConfig.json    |  6 ++++
 .../processing/servicesPatternTesters.js      |  9 ++++--
 src/test/tests.json                           |  9 ++++++
 7 files changed, 59 insertions(+), 3 deletions(-)
 create mode 100644 src/modules/processing/services/bandcamp.js

diff --git a/README.md b/README.md
index 16998478..8658f77e 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@ this list is not final and keeps expanding over time. if support for a service y
 
 | service                        | video + audio | only audio | only video | metadata | rich file names |
 | :--------                      | :-----------: | :--------: | :--------: | :------: | :-------------: |
+| bandcamp                       | ➖            | ✅         | ➖         | ✅         | ✅              |
 | bilibili.com                   | ✅            | ✅         | ✅         | ➖         | ➖              |
 | instagram posts & stories      | ✅            | ✅         | ✅         | ➖         | ➖              |
 | instagram reels                | ✅            | ✅         | ✅         | ➖         | ➖              |
diff --git a/package.json b/package.json
index c5bb65d3..0b3fc694 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
         "express-rate-limit": "^6.3.0",
         "ffmpeg-static": "^5.1.0",
         "hls-parser": "^0.10.7",
+        "libxmljs": "^1.0.11",
         "nanoid": "^4.0.2",
         "node-cache": "^5.1.2",
         "psl": "1.9.0",
diff --git a/src/modules/processing/match.js b/src/modules/processing/match.js
index 0d5980ca..23fd8263 100644
--- a/src/modules/processing/match.js
+++ b/src/modules/processing/match.js
@@ -24,6 +24,7 @@ import pinterest from "./services/pinterest.js";
 import streamable from "./services/streamable.js";
 import twitch from "./services/twitch.js";
 import rutube from "./services/rutube.js";
+import bandcamp from "./services/bandcamp.js";
 
 export default async function(host, patternMatch, url, lang, obj) {
     assert(url instanceof URL);
@@ -158,6 +159,12 @@ export default async function(host, patternMatch, url, lang, obj) {
                     isAudioOnly: isAudioOnly
                 });
                 break;
+            case "bandcamp":
+                r = await bandcamp({
+                    url,
+                    name: patternMatch.name
+                });
+                break;
             default:
                 return apiJSON(0, { t: errorUnsupported(lang) });
         }
diff --git a/src/modules/processing/services/bandcamp.js b/src/modules/processing/services/bandcamp.js
new file mode 100644
index 00000000..8a9597c6
--- /dev/null
+++ b/src/modules/processing/services/bandcamp.js
@@ -0,0 +1,29 @@
+import libxmljs from "libxmljs";
+
+export default async function(obj) {
+    const htmlContent = await fetch(obj.url.href).then((r) => {
+        return r.status === 200 ? r.text() : false
+    }).catch(() => { return false });
+    const htmlDoc = await libxmljs.parseHtmlAsync(htmlContent)
+        .then((d) => { return d });
+    const rawData = htmlDoc.find("//script[@data-tralbum]")[0];
+    const json = JSON.parse(rawData.getAttribute("data-tralbum").value());
+
+    let fileMetadata = {
+        title: json.current.title,
+        artist: json.artist
+    }
+
+    return {
+        urls: json.trackinfo[0].file["mp3-128"],
+        filenameAttributes: {
+            service: "bandcamp",
+            id: json.trackinfo[0].id,
+            title: fileMetadata.title,
+            artist: fileMetadata.artist,
+            extension: "mp3"
+        },
+        isMp3: true,
+        fileMetadata
+    }
+}
diff --git a/src/modules/processing/servicesConfig.json b/src/modules/processing/servicesConfig.json
index 9d903fcb..cb5a8e32 100644
--- a/src/modules/processing/servicesConfig.json
+++ b/src/modules/processing/servicesConfig.json
@@ -106,6 +106,12 @@
             "tld": "ru",
             "patterns": ["video/:id", "play/embed/:id"],
             "enabled": true
+        },
+        "bandcamp": {
+            "alias": "bandcamp music",
+            "patterns": ["track/:name"],
+            "subdomains": "*",
+            "enabled": true
         }
     }
 }
diff --git a/src/modules/processing/servicesPatternTesters.js b/src/modules/processing/servicesPatternTesters.js
index 970e8f40..46583079 100644
--- a/src/modules/processing/servicesPatternTesters.js
+++ b/src/modules/processing/servicesPatternTesters.js
@@ -1,11 +1,14 @@
 export const testers = {
+    "bandcamp": (patternMatch) =>
+        patternMatch.name?.length >= 0,
+
     "bilibili": (patternMatch) =>
         patternMatch.id?.length <= 12,
 
     "instagram": (patternMatch) =>
         patternMatch.postId?.length <= 12
         || (patternMatch.username?.length <= 30 && patternMatch.storyId?.length <= 24),
-    
+
     "ok": (patternMatch) =>
         patternMatch.id?.length <= 16,
 
@@ -19,12 +22,12 @@ export const testers = {
         patternMatch.id?.length === 32,
 
     "soundcloud": (patternMatch) =>
-        (patternMatch.author?.length <= 255 && patternMatch.song?.length <= 255) 
+        (patternMatch.author?.length <= 255 && patternMatch.song?.length <= 255)
         || patternMatch.shortLink?.length <= 32,
 
     "streamable": (patternMatch) =>
         patternMatch.id?.length === 6,
-    
+
     "tiktok": (patternMatch) =>
         patternMatch.postId?.length <= 21 || patternMatch.id?.length <= 13,
 
diff --git a/src/test/tests.json b/src/test/tests.json
index d3170858..0e06945e 100644
--- a/src/test/tests.json
+++ b/src/test/tests.json
@@ -1171,5 +1171,14 @@
             "code": 200,
             "status": "stream"
         }
+    }],
+    "bandcamp": [{
+        "name": "regular track",
+        "url": "https://home96.bandcamp.com/track/5",
+        "params": {},
+        "expected": {
+            "code": 200,
+            "status": "stream"
+        }
     }]
 }