feat(indexers): add support for optional baseurl override (#551)

* feat(indexers): optional baseurl override

* feat(indexers): update baseUrl parsing

* refactor(indexers): BREAKING move parse to IRC struct

* Move Parse as part of IRC struct from Indexer
* Updated definitions
* Build torrentUrl in stages
* Use new url.JoinPath to build torrentUrl
* Update tests

* refactor(indexers): select option obj

* refactor(indexers): make backwards compatible

internal/indexer/definitions/digitalcore.yaml

@@ -5,7 +5,7 @@ identifier: digitalcore
 description: DigitalCore (DC) is a private torrent tracker for General / 0 Day.
 language: en-us
 urls:
-  - https://digitalcore.club
+  - https://digitalcore.club/
 privacy: private
 protocol: torrent
 supports:
@@ -54,17 +54,17 @@ irc:
       label: Invite command
       help: Invite auth with Endor. Replace USERNAME and IRCKEY
 
-parse:
-  type: single
-  lines:
-    - test:
-        - "NEW TORRENT in Movies/XviD :: This.is.my.Movie.2019.BRRip.XviD.AC3-iND :: https://digitalcore.club/api/v1/torrents/download/00000"
-      pattern: '^NEW.TORRENT.in.(.*?).::.(.*?).::.(.*)\/([0-9a-zA-Z]+)'
-      vars:
-        - category
-        - torrentName
-        - baseUrl
-        - torrentId
+  parse:
+    type: single
+    lines:
+      - test:
+          - "NEW TORRENT in Movies/XviD :: This.is.my.Movie.2019.BRRip.XviD.AC3-iND :: https://digitalcore.club/api/v1/torrents/download/00000"
+        pattern: 'NEW TORRENT in (.+) :: (.+) :: (https:\/\/.+\/).+\/([0-9a-zA-Z]+)'
+        vars:
+          - category
+          - torrentName
+          - baseUrl
+          - torrentId
 
-  match:
-    torrenturl: "{{ .baseUrl }}/{{ .torrentId }}/{{ .passkey }}"
+    match:
+      torrenturl: "/api/v1/torrents/download/{{ .torrentId }}/{{ .passkey }}"