Bug 40028: Define bootstrapping events and Quick Start

app/src/main/java/org/mozilla/fenix/tor/bootstrap/TorQuickStart.kt

+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.tor.bootstrap
+
+import android.content.Context
+import android.content.SharedPreferences
+import android.os.StrictMode
+import androidx.annotation.VisibleForTesting
+import mozilla.components.support.ktx.android.content.PreferencesHolder
+import mozilla.components.support.ktx.android.content.booleanPreference
+import org.mozilla.fenix.ext.application
+import org.mozilla.fenix.ext.components
+
+class TorQuickStart(val context: Context) : PreferencesHolder {
+
+    override val preferences: SharedPreferences =
+        context.components.strictMode.resetAfter(StrictMode.allowThreadDiskReads()) {
+            context.getSharedPreferences(
+                PREF_NAME_TOR_BOOTSTRAP_KEY,
+                Context.MODE_PRIVATE
+            )
+        }
+
+    private var torQuickStart by booleanPreference(TOR_QUICK_START, default = false)
+
+    fun quickStartTor() =
+        context.components.strictMode.resetAfter(StrictMode.allowThreadDiskReads()) { torQuickStart }
+
+    fun enableQuickStartTor() {
+        torQuickStart = true
+    }
+    fun disableQuickStartTor() {
+        torQuickStart = false
+    }
+    fun setQuickStartTor(enabled: Boolean) = if (enabled) {
+        enableQuickStartTor()
+    } else {
+        disableQuickStartTor()
+    }
+
+    companion object {
+        /**
+         * Name of the shared preferences file.
+         */
+        private const val PREF_NAME_TOR_BOOTSTRAP_KEY = "tor.bootstrap"
+
+        /**
+         * Key for [quickStartTor].
+         */
+        @VisibleForTesting
+        internal const val TOR_QUICK_START = "tor.bootstrap.quick_start_enabled"
+    }
+}