Merge pull request #391 from Bnyro/master

Update Checker

app/src/main/java/com/github/libretube/SettingsActivity.kt

@@ -30,6 +30,7 @@ import androidx.preference.PreferenceManager
 import com.github.libretube.dialogs.LoginDialog
 import com.github.libretube.util.RetrofitInstance
 import com.github.libretube.util.changeIcon
+import com.github.libretube.util.checkUpdate
 import com.github.libretube.util.restartMainActivity
 import com.github.libretube.util.updateTheme
 import com.google.android.material.color.DynamicColors
@@ -154,6 +155,11 @@ class SettingsActivity :
                     }
                 }
             super.onCreate(savedInstanceState)
+            try {
+                checkUpdate(childFragmentManager)
+            } catch (e: Exception) {
+                e.printStackTrace()
+            }
         }
 
         override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {

app/src/main/java/com/github/libretube/dialogs/UpdateAvailableDialog.kt

@@ -0,0 +1,32 @@
+package com.github.libretube.dialogs
+
+import android.app.Dialog
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import androidx.fragment.app.DialogFragment
+import com.github.libretube.R
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+
+class UpdateAvailableDialog(
+    private val versionTag: String,
+    private val updateLink: String
+) : DialogFragment() {
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        return activity?.let {
+            MaterialAlertDialogBuilder(requireContext())
+                .setTitle(context?.getString(R.string.update_available, versionTag))
+                .setMessage(context?.getString(R.string.update_available_text))
+                .setNegativeButton(context?.getString(R.string.cancel)) { _, _ ->
+                    dismiss()
+                }
+                .setPositiveButton(context?.getString(R.string.okay)) { _, _ ->
+                    val uri = Uri.parse(updateLink)
+                    val intent = Intent(Intent.ACTION_VIEW).setData(uri)
+                    startActivity(intent)
+                }
+                .show()
+        } ?: throw IllegalStateException("Activity cannot be null")
+    }
+}

app/src/main/java/com/github/libretube/util/UpdateChecker.kt

@@ -0,0 +1,74 @@
+package com.github.libretube.util
+
+import android.util.Log
+import androidx.fragment.app.FragmentManager
+import com.github.libretube.BuildConfig
+import com.github.libretube.dialogs.UpdateAvailableDialog
+import java.io.BufferedReader
+import java.io.InputStreamReader
+import java.net.URL
+import javax.net.ssl.HttpsURLConnection
+import org.json.JSONArray
+import org.json.JSONObject
+
+fun checkUpdate(childFragmentManager: FragmentManager) {
+    var updateInfo: UpdateInfo? = UpdateInfo("", "")
+    // run http request as thread to make it async
+    val thread = Thread {
+        // otherwise crashes without internet
+        try {
+            updateInfo = getUpdateInfo()
+        } catch (e: Exception) {
+        }
+    }
+    thread.start()
+    // wait for the thread to finish
+    thread.join()
+    // show the UpdateAvailableDialog if there's an update available
+    if (updateInfo?.tagName != "" && BuildConfig.VERSION_NAME != updateInfo?.tagName) {
+        val updateAvailableDialog = UpdateAvailableDialog(
+            updateInfo?.tagName!!,
+            updateInfo?.updateUrl!!
+        )
+        updateAvailableDialog.show(childFragmentManager, "UpdateAvailableDialog")
+    }
+}
+
+fun getUpdateInfo(): UpdateInfo? {
+    val latest = URL("https://api.github.com/repos/libre-tube/LibreTube/releases/latest")
+    val json = StringBuilder()
+    val urlConnection: HttpsURLConnection?
+    urlConnection = latest.openConnection() as HttpsURLConnection
+    val br = BufferedReader(InputStreamReader(urlConnection.inputStream))
+
+    var line: String?
+    while (br.readLine().also { line = it } != null) json.append(line)
+
+    // Parse and return json data
+    val jsonRoot = JSONObject(json.toString())
+    if (jsonRoot.has("tag_name") &&
+        jsonRoot.has("html_url") &&
+        jsonRoot.has("assets")
+    ) {
+        val updateUrl = jsonRoot.getString("html_url")
+        val jsonAssets: JSONArray = jsonRoot.getJSONArray("assets")
+        for (i in 0 until jsonAssets.length()) {
+            val jsonAsset = jsonAssets.getJSONObject(i)
+            if (jsonAsset.has("name")) {
+                val name = jsonAsset.getString("name")
+                if (name.endsWith(".apk")) {
+                    val tagName = jsonRoot.getString("name")
+                    Log.i("", "Lastest version: $tagName")
+                    return UpdateInfo(updateUrl, tagName)
+                }
+            }
+        }
+    }
+    return null
+}
+
+// data class for the update info, required to return the data
+data class UpdateInfo(
+    val updateUrl: String,
+    val tagName: String
+)

app/src/main/res/values/strings.xml

@@ -116,4 +116,6 @@
     <string name="piped">Piped</string>
     <string name="youtube">YouTube</string>
     <string name="playOnBackground">Play on background</string>
+    <string name="update_available">Version %1$s is available</string>
+    <string name="update_available_text">There is a new update available. Click okay to become redirected to the update page on GitHub.</string>
 </resources>