incorporate androidlib

app/src/main/java/com/geeksville/mesh/android/AppPrefs.kt

@@ -0,0 +1,110 @@
+package com.geeksville.mesh.android
+
+import android.content.Context
+import android.content.SharedPreferences
+import java.util.UUID
+import kotlin.reflect.KProperty
+
+/**
+ * Created by kevinh on 1/4/15.
+ */
+
+
+/**
+ * A delegate for "foo by FloatPref"
+ */
+class FloatPref {
+    fun get(thisRef: AppPrefs, prop: KProperty<Float>): Float = thisRef.getPrefs().getFloat(thisRef.makeName(prop.name), java.lang.Float.MIN_VALUE)
+
+    fun set(thisRef: AppPrefs, prop: KProperty<Float>, value: Float) {
+        thisRef.setPrefs { e -> e.putFloat(thisRef.makeName(prop.name), value)}
+    }
+}
+
+/**
+ * A delegate for "foo by StringPref"
+ */
+class StringPref(val default: String) {
+    fun get(thisRef: AppPrefs, prop: KProperty<String>): String = thisRef.getPrefs().getString(thisRef.makeName(prop.name), default)!!
+
+    fun set(thisRef: AppPrefs, prop: KProperty<String>, value: String) {
+        thisRef.setPrefs { e ->
+            e.putString(thisRef.makeName(prop.name), value)
+        }
+    }
+}
+
+/**
+ * A mixin for accessing android prefs for the app
+ */
+public open class AppPrefs(val context: Context) {
+
+    companion object {
+        private val baseName = "appPrefs_"
+    }
+
+    fun makeName(s: String) = baseName + s
+
+    fun getPrefs() = context.getSharedPreferences("prefs", Context.MODE_PRIVATE)
+
+    fun setPrefs(body: (SharedPreferences.Editor) -> Unit) {
+        val e = getPrefs().edit()
+        body(e)
+        e.commit()
+    }
+
+    fun incPref(name: String) {
+        setPrefs { e ->
+            e.putInt(name, 1 + getPrefs().getInt(name, 0))
+        }
+    }
+
+    fun removePref(name: String) {
+        setPrefs { e ->
+            e.remove(name)
+        }
+    }
+
+    fun putPref(name: String, b: Boolean) {
+        setPrefs { e ->
+            e.putBoolean(name, b)
+        }
+    }
+
+    fun putPref(name: String, b: Float) {
+        setPrefs { e ->
+            e.putFloat(name, b)
+        }
+    }
+
+    fun putPref(name: String, b: Int) {
+        setPrefs { e ->
+            e.putInt(name, b)
+        }
+    }
+
+    fun putPref(name: String, b: Set<String>) {
+        setPrefs { e ->
+            e.putStringSet(name, b)
+        }
+    }
+
+    fun putPref(name: String, b: String) {
+        setPrefs { e ->
+            e.putString(name, b)
+        }
+    }
+
+    /**
+     * Return a persistent installation ID
+     */
+    fun getInstallId(): String {
+        var r = getPrefs().getString(makeName("installId"), "")!!
+        if(r == "") {
+            r = UUID.randomUUID().toString()
+            putPref(makeName("installId"), r)
+        }
+
+        return r
+    }
+}