Improve video prefetching (#17)

* Create base activity and add thumbnails to media picker

* Add checker to see if requested permission is inside the manifest

* Add faq parser with tests

* Add kpref testers and expose sp

* Test jitpack sample exclusion

* Test caching

* Improve glide caching

6 files changed, 78 insertions, 10 deletions

diff --git a/core/src/main/kotlin/ca/allanwang/kau/internal/KauBaseActivity.kt b/core/src/main/kotlin/ca/allanwang/kau/internal/KauBaseActivity.kt
new file mode 100644
index 0000000..87d94ce
--- /dev/null
+++ b/core/src/main/kotlin/ca/allanwang/kau/internal/KauBaseActivity.kt
@@ -0,0 +1,21 @@
+package ca.allanwang.kau.internal
+
+import android.support.v7.app.AppCompatActivity
+import ca.allanwang.kau.permissions.kauOnRequestPermissionsResult
+
+/**
+ * Created by Allan Wang on 2017-08-01.
+ *
+ * Base activity for any activity that would have extended [AppCompatActivity]
+ *
+ * Ensures that some singleton methods are called.
+ * This is simply a convenience class;
+ * you can always copy and paste this to your own class.
+ */
+abstract class KauBaseActivity : AppCompatActivity() {
+
+    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
+        kauOnRequestPermissionsResult(permissions, grantResults)
+    }
+}
\ No newline at end of file
diff --git a/core/src/main/kotlin/ca/allanwang/kau/kotlin/LazyResettable.kt b/core/src/main/kotlin/ca/allanwang/kau/kotlin/LazyResettable.kt
index 701cb07..2ac5d2f 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/kotlin/LazyResettable.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/kotlin/LazyResettable.kt
@@ -50,7 +50,7 @@ open class LazyResettable<T : Any>(private val initializer: () -> T, lock: Any?
     }
 }
 
-interface ILazyResettable<T> : Lazy<T> {
+interface ILazyResettable<out T> : Lazy<T> {
     fun invalidate()
 }
 
diff --git a/core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt b/core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt
index c1ce282..be16c7c 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt
@@ -39,7 +39,8 @@ open class KPref {
         }
     }
 
-    internal val sp: SharedPreferences by lazy {
+    //todo hide this
+    val sp: SharedPreferences by lazy {
         if (!initialized) throw KPrefException("KPref object has not yet been initialized; please initialize it with a context and preference name")
         c.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE)
     }
diff --git a/core/src/main/kotlin/ca/allanwang/kau/permissions/PermissionManager.kt b/core/src/main/kotlin/ca/allanwang/kau/permissions/PermissionManager.kt
index d6e17db..0c42574 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/permissions/PermissionManager.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/permissions/PermissionManager.kt
@@ -2,13 +2,17 @@ package ca.allanwang.kau.permissions
 
 import android.app.Activity
 import android.content.Context
+import android.content.pm.PackageManager
 import android.support.v4.app.ActivityCompat
+import ca.allanwang.kau.kotlin.lazyContext
 import ca.allanwang.kau.logging.KL
 import ca.allanwang.kau.utils.KauException
 import ca.allanwang.kau.utils.buildIsMarshmallowAndUp
 import ca.allanwang.kau.utils.hasPermission
+import ca.allanwang.kau.utils.toast
 import java.lang.ref.WeakReference
 
+
 /**
  * Created by Allan Wang on 2017-07-03.
  */
@@ -17,6 +21,17 @@ internal object PermissionManager {
     var requestInProgress = false
     val pendingResults: MutableList<WeakReference<PermissionResult>> by lazy { mutableListOf<WeakReference<PermissionResult>>() }
 
+    /**
+     * Retrieve permissions requested in our manifest
+     */
+    val manifestPermission = lazyContext<Array<String>> {
+        try {
+            it.packageManager.getPackageInfo(it.packageName, PackageManager.GET_PERMISSIONS)?.requestedPermissions ?: emptyArray()
+        } catch (e: Exception) {
+            emptyArray()
+        }
+    }
+
     operator fun invoke(context: Context, permissions: Array<out String>, callback: (granted: Boolean, deniedPerm: String?) -> Unit) {
         KL.d("Permission manager for: ${permissions.contentToString()}")
         if (!buildIsMarshmallowAndUp) return callback(true, null)
@@ -30,6 +45,13 @@ internal object PermissionManager {
     }
 
     @Synchronized internal fun requestPermissions(context: Context, permissions: Array<out String>) {
+        permissions.forEach {
+            if (!manifestPermission(context).contains(it)) {
+                KL.e("Requested permission $it is not stated in the manifest")
+                context.toast("$it is not in the manifest")
+                //we'll let the request pass through so it can be denied and so the callback can be triggered
+            }
+        }
         val activity = (context as? Activity) ?: throw KauException("Context is not an instance of an activity; cannot request permissions")
         KL.d("Requesting permissions ${permissions.contentToString()}")
         ActivityCompat.requestPermissions(activity, permissions, 1)
diff --git a/core/src/main/kotlin/ca/allanwang/kau/ui/views/MeasureSpecDelegate.kt b/core/src/main/kotlin/ca/allanwang/kau/ui/views/MeasureSpecDelegate.kt
index edc1536..716fd71 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/ui/views/MeasureSpecDelegate.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/ui/views/MeasureSpecDelegate.kt
@@ -11,6 +11,8 @@ import ca.allanwang.kau.utils.parentViewGroup
  * Created by Allan Wang on 2017-07-14.
  *
  * Handles relative sizes for any view
+ * You may delegate all methods to [MeasureSpecDelegate]
+ * and call the two methods: [initAttrs] and [onMeasure]
  */
 interface MeasureSpecContract {
 
@@ -53,6 +55,16 @@ interface MeasureSpecContract {
      * Calculates the final measure specs
      * Call this from [View.onMeasure] and send the Pair result as the specs
      * The pair is of the format (width, height)
+     *
+     * Example:
+     * <pre>
+     * {@code
+     * override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+     *     val result = onMeasure(this, widthMeasureSpec, heightMeasureSpec)
+     *     super.onMeasure(result.first, result.second)
+     * }
+     * }
+     * </pre>
      */
     fun onMeasure(view: View, widthMeasureSpec: Int, heightMeasureSpec: Int): Pair<Int, Int>
 }
diff --git a/core/src/main/kotlin/ca/allanwang/kau/xml/FAQ.kt b/core/src/main/kotlin/ca/allanwang/kau/xml/FAQ.kt
index dedfbbf..b39540c 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/xml/FAQ.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/xml/FAQ.kt
@@ -22,16 +22,28 @@ fun Context.kauParseFaq(@XmlRes xmlRes: Int, withNumbering: Boolean = true): Lis
         parser: XmlResourceParser ->
         var eventType = parser.eventType
         var question: Spanned? = null
+        var flag = -1 //-1, 0, 1 -> invalid, question, answer
         while (eventType != XmlPullParser.END_DOCUMENT) {
             if (eventType == XmlPullParser.START_TAG) {
-                if (parser.name == "question") {
-                    var q = parser.text.replace("\n", "<br/>")
-                    if (withNumbering) q = "${items.size + 1}. $q"
-                    question = Html.fromHtml(q)
-                } else if (parser.name == "answer") {
-                    items.add(Pair(question ?: throw IllegalArgumentException("KAU FAQ answer found without a question"),
-                            Html.fromHtml(parser.text.replace("\n", "<br/>"))))
-                    question = null
+                flag = when (parser.name) {
+                    "question" -> 0
+                    "answer" -> 1
+                    else -> -1
+                }
+            } else if (eventType == XmlPullParser.TEXT) {
+                when (flag) {
+                    0 -> {
+                        var q = parser.text.replace("\n", "<br/>")
+                        if (withNumbering) q = "${items.size + 1}. $q"
+                        question = Html.fromHtml(q)
+                        flag = -1
+                    }
+                    1 -> {
+                        items.add(Pair(question ?: throw IllegalArgumentException("KAU FAQ answer found without a question"),
+                                Html.fromHtml(parser.text.replace("\n", "<br/>"))))
+                        question = null
+                        flag = -1
+                    }
                 }
             }