add api support for additional channels

api.md

@@ -20,6 +20,9 @@ POST /plugins.remove?profile=id      ["<pkg1>", "<pkg2>", …]
 GET  /variants.list?profile=id
 POST /variants.reset?profile=id      ["<label1>", "<label2>", …]
 
+GET  /channels.list?profile=id
+POST /channels.set?profile=id        ["<url1>", "<url2>", …]
+
 GET  /update?profile=id              (websocket)
 
 GET  /server.status
@@ -221,6 +224,29 @@ Example:
 curl -X POST -d '["nightmode"]' http://localhost:51515/variants.reset?profile=<id>
 ```
 
+## channels.list
+
+Get the ordered list of configured channel URLs.
+
+Synopsis: `GET /channels.list?profile=id`
+
+Returns: `["<url1>", "<url2>", …]`
+
+## channels.set
+
+Overwrite the list of channel URLs. If empty, the default channel is added instead.
+
+Synopsis: `POST /channels.set?profile=id ["<url1>", "<url2">, …]`
+
+Returns:
+- 400 `/error/bad-request`
+- 200 `{"$type": "/result", "ok": true}`
+
+Example:
+```sh
+curl -X POST -d '["url"]' http://localhost:51515/channels.set?profile=<id>
+```
+
 ## update
 
 Opening a websocket at `/update` triggers the update process.

src/main/scala/sc4pac/api/api.scala

@@ -8,7 +8,7 @@ import zio.{ZIO, IO, URIO}
 import upickle.default as UP
 
 import sc4pac.JsonData as JD
-import JD.bareModuleRw
+import JD.{bareModuleRw, uriRw}
 
 
 class Api(options: sc4pac.cli.Commands.ServerOptions) {
@@ -306,6 +306,30 @@ class Api(options: sc4pac.cli.Commands.ServerOptions) {
       }
     },
 
+    // 200, 409
+    Method.GET / "channels.list" -> handler {
+      wrapHttpEndpoint {
+        for {
+          pluginsData <- readPluginsOr409
+        } yield jsonResponse(pluginsData.config.channels)
+      }
+    },
+
+    // 200, 400, 409
+    Method.POST / "channels.set" -> handler { (req: Request) =>
+      wrapHttpEndpoint {
+        for {
+          urls         <- parseOr400[Seq[java.net.URI]](req.body, ErrorMessage.BadRequest("Malformed channel URLs.", "Pass channels as an array of strings."))
+          pluginsData  <- readPluginsOr409
+          pluginsData2 =  pluginsData.copy(config = pluginsData.config.copy(channels =
+                            if (urls.nonEmpty) urls.distinct else Constants.defaultChannelUrls
+                          ))
+          path         <- JD.Plugins.pathURIO
+          _            <- JsonIo.write(path, pluginsData2, None)(ZIO.succeed(()))
+        } yield jsonOk
+      }
+    },
+
   )
 
   def routes: Routes[ProfilesDir, Nothing] = {