Create ApplicationsProvider and AppplicationsIcon cache

3 files changed, 68 insertions, 0 deletions

diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/AppData.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/AppData.kt
new file mode 100644
index 0000000000..5bed89c149
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/AppData.kt
@@ -0,0 +1,3 @@
+package net.mullvad.mullvadvpn.applist
+
+data class AppData(val packageName: String, val iconRes: Int, val name: String)
diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/ApplicationsIconManager.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/ApplicationsIconManager.kt
new file mode 100644
index 0000000000..e266f3d044
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/ApplicationsIconManager.kt
@@ -0,0 +1,26 @@
+package net.mullvad.mullvadvpn.applist
+
+import android.content.pm.PackageManager
+import android.graphics.drawable.Drawable
+import android.os.Looper
+import androidx.annotation.WorkerThread
+import androidx.collection.LruCache
+
+class ApplicationsIconManager(private val packageManager: PackageManager) {
+    private val iconsCache = LruCache<String, Drawable>(500)
+
+    @WorkerThread
+    fun getAppIcon(packageName: String): Drawable {
+        check(!Looper.getMainLooper().isCurrentThread) { "Should not be called from MainThread" }
+        iconsCache.get(packageName)?.let {
+            return it
+        }
+        return packageManager.getApplicationIcon(packageName).also {
+            iconsCache.put(packageName, it)
+        }
+    }
+
+    fun dispose() {
+        iconsCache.evictAll()
+    }
+}
diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/ApplicationsProvider.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/ApplicationsProvider.kt
new file mode 100644
index 0000000000..a097ffd231
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/applist/ApplicationsProvider.kt
@@ -0,0 +1,39 @@
+package net.mullvad.mullvadvpn.applist
+
+import android.Manifest
+import android.content.pm.ApplicationInfo
+import android.content.pm.PackageManager
+
+class ApplicationsProvider(
+    private val packageManager: PackageManager,
+    private val thisPackageName: String
+) {
+    private val applicationFilterPredicate: (ApplicationInfo) -> Boolean = { appInfo ->
+        hasInternetPermission(appInfo.packageName) &&
+            isLaunchable(appInfo.packageName) &&
+            !isSelfApplication(appInfo.packageName)
+    }
+
+    fun getAppsList(): List<AppData> {
+        return packageManager.getInstalledApplications(PackageManager.GET_META_DATA)
+            .asSequence()
+            .filter(applicationFilterPredicate)
+            .map { info ->
+                AppData(info.packageName, info.icon, info.loadLabel(packageManager).toString())
+            }
+            .toList()
+    }
+
+    private fun hasInternetPermission(packageName: String): Boolean {
+        return PackageManager.PERMISSION_GRANTED ==
+            packageManager.checkPermission(Manifest.permission.INTERNET, packageName)
+    }
+
+    private fun isLaunchable(packageName: String): Boolean {
+        return packageManager.getLaunchIntentForPackage(packageName) != null
+    }
+
+    private fun isSelfApplication(packageName: String): Boolean {
+        return packageName == thisPackageName
+    }
+}