1 files changed, 172 insertions, 0 deletions
diff --git a/app/src/main/java/com/zeapo/pwdstore/utils/AndroidExtensions.kt b/app/src/main/java/com/zeapo/pwdstore/utils/AndroidExtensions.kt
new file mode 100644
index 00000000..3ee1820d
--- /dev/null
+++ b/app/src/main/java/com/zeapo/pwdstore/utils/AndroidExtensions.kt
@@ -0,0 +1,172 @@
+/*
+ * Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package com.zeapo.pwdstore.utils
+
+import android.app.KeyguardManager
+import android.content.ClipboardManager
+import android.content.Context
+import android.content.SharedPreferences
+import android.content.pm.PackageManager
+import android.os.Build
+import android.util.Base64
+import android.util.TypedValue
+import android.view.View
+import android.view.autofill.AutofillManager
+import android.view.inputmethod.InputMethodManager
+import androidx.annotation.IdRes
+import androidx.annotation.RequiresApi
+import androidx.appcompat.app.AlertDialog
+import androidx.core.content.ContextCompat
+import androidx.core.content.getSystemService
+import androidx.fragment.app.FragmentActivity
+import androidx.preference.PreferenceManager
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKey
+import com.github.ajalt.timberkt.d
+import com.github.michaelbull.result.Ok
+import com.github.michaelbull.result.Result
+import com.google.android.material.snackbar.Snackbar
+import com.zeapo.pwdstore.R
+import com.zeapo.pwdstore.git.operation.GitOperation
+
+/**
+ * Extension function for [AlertDialog] that requests focus for the
+ * view whose id is [id]. Solution based on a StackOverflow
+ * answer: https://stackoverflow.com/a/13056259/297261
+ */
+fun <T : View> AlertDialog.requestInputFocusOnView(@IdRes id: Int) {
+    setOnShowListener {
+        findViewById<T>(id)?.apply {
+            setOnFocusChangeListener { v, _ ->
+                v.post {
+                    context.getSystemService<InputMethodManager>()
+                        ?.showSoftInput(v, InputMethodManager.SHOW_IMPLICIT)
+                }
+            }
+            requestFocus()
+        }
+    }
+}
+
+/**
+ * Get an instance of [AutofillManager]. Only
+ * available on Android Oreo and above
+ */
+val Context.autofillManager: AutofillManager?
+    @RequiresApi(Build.VERSION_CODES.O)
+    get() = getSystemService()
+
+/**
+ * Get an instance of [ClipboardManager]
+ */
+val Context.clipboard
+    get() = getSystemService<ClipboardManager>()
+
+/**
+ * Wrapper for [getEncryptedPrefs] to avoid open-coding the file name at
+ * each call site
+ */
+fun Context.getEncryptedGitPrefs() = getEncryptedPrefs("git_operation")
+
+/**
+ * Get an instance of [EncryptedSharedPreferences] with the given [fileName]
+ */
+private fun Context.getEncryptedPrefs(fileName: String): SharedPreferences {
+    val masterKeyAlias = MasterKey.Builder(applicationContext)
+        .setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
+        .build()
+    return EncryptedSharedPreferences.create(
+        applicationContext,
+        fileName,
+        masterKeyAlias,
+        EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+        EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+    )
+}
+
+/**
+ * Get an instance of [KeyguardManager]
+ */
+val Context.keyguardManager: KeyguardManager
+    get() = getSystemService()!!
+
+/**
+ * Get the default [SharedPreferences] instance
+ */
+val Context.sharedPrefs: SharedPreferences
+    get() = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+
+
+/**
+ * Resolve [attr] from the [Context]'s theme
+ */
+fun Context.resolveAttribute(attr: Int): Int {
+    val typedValue = TypedValue()
+    this.theme.resolveAttribute(attr, typedValue, true)
+    return typedValue.data
+}
+
+/**
+ * Commit changes to the store from a [FragmentActivity] using
+ * a custom implementation of [GitOperation]
+ */
+suspend fun FragmentActivity.commitChange(
+    message: String,
+): Result<Unit, Throwable> {
+    if (!PasswordRepository.isGitRepo()) {
+        return Ok(Unit)
+    }
+    return object : GitOperation(this@commitChange) {
+        override val commands = arrayOf(
+            // Stage all files
+            git.add().addFilepattern("."),
+            // Populate the changed files count
+            git.status(),
+            // Commit everything! If anything changed, that is.
+            git.commit().setAll(true).setMessage(message),
+        )
+
+        override fun preExecute(): Boolean {
+            d { "Committing with message: '$message'" }
+            return true
+        }
+    }.execute()
+}
+
+/**
+ * Check if [permission] has been granted to the app.
+ */
+fun FragmentActivity.isPermissionGranted(permission: String): Boolean {
+    return ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED
+}
+
+/**
+ * Show a [Snackbar] in a [FragmentActivity] and correctly
+ * anchor it to a [com.google.android.material.floatingactionbutton.FloatingActionButton]
+ * if one exists in the [view]
+ */
+fun FragmentActivity.snackbar(
+    view: View = findViewById(android.R.id.content),
+    message: String,
+    length: Int = Snackbar.LENGTH_SHORT,
+): Snackbar {
+    val snackbar = Snackbar.make(view, message, length)
+    snackbar.anchorView = findViewById(R.id.fab)
+    snackbar.show()
+    return snackbar
+}
+
+/**
+ * Simplifies the common `getString(key, null) ?: defaultValue` case slightly
+ */
+fun SharedPreferences.getString(key: String): String? = getString(key, null)
+
+/**
+ * Convert this [String] to its [Base64] representation
+ */
+fun String.base64(): String {
+    return Base64.encodeToString(encodeToByteArray(), Base64.NO_WRAP)
+}