Tag translation

app/src/main/java/xyz/quaver/pupil/util/misc.kt

@@ -23,6 +23,9 @@ import android.content.Context
 import android.content.Intent
 import android.os.Build
 import androidx.core.content.ContextCompat
+import kotlinx.serialization.json.JsonElement
+import kotlinx.serialization.json.jsonArray
+import kotlinx.serialization.json.jsonObject
 import okhttp3.OkHttpClient
 import okhttp3.Request
 import xyz.quaver.Code
@@ -128,4 +131,10 @@ fun String.ellipsize(n: Int): String =
     if (this.length > n)
         this.slice(0 until n) + "…"
     else
-        this
+        this
+
+operator fun JsonElement.get(index: Int) =
+    this.jsonArray[index]
+
+operator fun JsonElement.get(tag: String) =
+    this.jsonObject[tag]

app/src/main/java/xyz/quaver/pupil/util/translation.kt

@@ -0,0 +1,66 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.util
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.jsonArray
+import kotlinx.serialization.json.jsonPrimitive
+import okhttp3.Request
+import xyz.quaver.pupil.client
+import java.io.IOException
+import java.util.*
+
+private val filesURL = "https://api.github.com/repos/tom5079/Pupil/git/trees/tags"
+private val contentURL = "https://raw.githubusercontent.com/tom5079/Pupil/tags/"
+
+var translations: Map<String, String> = run {
+    updateTranslations()
+    emptyMap()
+}
+    private set
+
+@Suppress("BlockingMethodInNonBlockingContext")
+fun updateTranslations() = CoroutineScope(Dispatchers.IO).launch {
+    translations = emptyMap()
+    translations = Json.decodeFromString<Map<String, String>>(client.newCall(
+        Request.Builder()
+            .url(contentURL + "${Preferences["tag_language", ""]}.json")
+            .build()
+    ).execute().also { if (it.code() != 200) return@launch }.body()?.use { it.string() } ?: return@launch).filterValues { it.isNotEmpty() }
+}
+
+fun getAvailableLanguages(): List<String> {
+    val languages = Locale.getISOLanguages()
+
+    val json = Json.parseToJsonElement(client.newCall(
+        Request.Builder()
+            .url(filesURL)
+            .build()
+    ).execute().also { if (it.code() != 200) throw IOException() }.body()?.use { it.string() } ?: return emptyList())
+
+    return listOf("en") + (json["tree"]?.jsonArray?.mapNotNull {
+        val name = it["path"]?.jsonPrimitive?.content?.takeWhile { c -> c != '.' }
+
+        languages.firstOrNull { code -> code.equals(name, ignoreCase = true) }
+    } ?: emptyList())
+}