Added SMS drafts support (#83)

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt

@@ -108,11 +108,25 @@ class ThreadActivity : SimpleActivity() {
 
     override fun onResume() {
         super.onResume()
+
+        val smsDraft = getSmsDraft(threadId)
+        if (smsDraft != null) {
+            thread_type_message.setText(smsDraft)
+        }
         isActivityVisible = true
     }
 
     override fun onPause() {
         super.onPause()
+
+        if (thread_type_message.value != "" && attachmentUris.isEmpty()) {
+            saveSmsDraft(thread_type_message.value, threadId)
+        } else {
+            deleteSmsDraft(threadId)
+        }
+
+        bus?.post(Events.RefreshMessages())
+
         isActivityVisible = false
     }
 

app/src/main/kotlin/com/simplemobiletools/smsmessenger/adapters/ConversationsAdapter.kt

@@ -23,6 +23,7 @@ import com.simplemobiletools.commons.views.MyRecyclerView
 import com.simplemobiletools.smsmessenger.R
 import com.simplemobiletools.smsmessenger.activities.SimpleActivity
 import com.simplemobiletools.smsmessenger.extensions.deleteConversation
+import com.simplemobiletools.smsmessenger.extensions.getSmsDraft
 import com.simplemobiletools.smsmessenger.helpers.refreshMessages
 import com.simplemobiletools.smsmessenger.models.Conversation
 import kotlinx.android.synthetic.main.item_conversation.view.*
@@ -220,6 +221,8 @@ class ConversationsAdapter(
 
     private fun setupView(view: View, conversation: Conversation) {
         view.apply {
+            val smsDraft = context.getSmsDraft(conversation.threadId)
+
             conversation_frame.isSelected = selectedKeys.contains(conversation.hashCode())
 
             conversation_address.apply {
@@ -228,10 +231,14 @@ class ConversationsAdapter(
             }
 
             conversation_body_short.apply {
-                text = conversation.snippet
+                text = smsDraft ?: conversation.snippet
                 setTextSize(TypedValue.COMPLEX_UNIT_PX, fontSize * 0.9f)
             }
 
+            draft_indicator.apply {
+                visibility = if (smsDraft != null) View.VISIBLE else View.GONE
+            }
+
             conversation_date.apply {
                 text = conversation.date.formatDateOrTime(context, true, false)
                 setTextSize(TypedValue.COMPLEX_UNIT_PX, fontSize * 0.8f)

app/src/main/kotlin/com/simplemobiletools/smsmessenger/extensions/Context.kt

@@ -764,3 +764,55 @@ fun Context.getLockScreenVisibilityText(type: Int) = getString(
         else -> R.string.nothing
     }
 )
+
+fun Context.getSmsDraft(threadId: Long): String? {
+    val uri = Sms.Draft.CONTENT_URI
+    val projection = arrayOf(Sms.BODY)
+    val selection = "${Sms.THREAD_ID} = ?"
+    val selectionArgs = arrayOf(threadId.toString())
+
+    try {
+        val cursor = contentResolver.query(uri, projection, selection, selectionArgs, null)
+        cursor.use {
+            if (cursor?.moveToFirst() == true) {
+                return cursor.getString(0)
+            }
+        }
+    } catch (e: Exception) {
+    }
+
+    return null
+}
+
+fun Context.saveSmsDraft(body: String, threadId: Long) {
+    val uri = Sms.Draft.CONTENT_URI
+    val contentValues = ContentValues().apply {
+        put(Sms.BODY, body)
+        put(Sms.DATE, System.currentTimeMillis().toString())
+        put(Sms.TYPE, Sms.MESSAGE_TYPE_DRAFT)
+        put(Sms.THREAD_ID, threadId)
+    }
+
+    try {
+        contentResolver.insert(uri, contentValues)
+    } catch (e: Exception) {
+    }
+}
+
+fun Context.deleteSmsDraft(threadId: Long) {
+    val lookupUri = Sms.Draft.CONTENT_URI
+    val lookupProjection = arrayOf(Sms._ID)
+    val lookupSelection = "${Sms.THREAD_ID} = ?"
+    val lookupSelectionArgs = arrayOf(threadId.toString())
+    try {
+        val cursor = contentResolver.query(lookupUri, lookupProjection, lookupSelection, lookupSelectionArgs, null)
+        cursor.use {
+            if (cursor?.moveToFirst() == true) {
+                val draftId = cursor.getLong(0)
+                val uri = Uri.withAppendedPath(Sms.CONTENT_URI, "/${draftId}")
+                contentResolver.delete(uri, null, null)
+            }
+        }
+    } catch (e: Exception) {
+    }
+}

app/src/main/res/layout/item_conversation.xml

@@ -37,12 +37,26 @@
             android:textSize="@dimen/big_text_size"
             tools:text="John" />
 
+        <TextView
+            android:id="@+id/draft_indicator"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@+id/conversation_address"
+            android:layout_toEndOf="@+id/conversation_image"
+            android:textColor="@color/color_primary"
+            android:textStyle="italic"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:paddingEnd="@dimen/small_margin"
+            android:textSize="@dimen/normal_text_size"
+            android:text="@string/draft" />
+
         <TextView
             android:id="@+id/conversation_body_short"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_below="@+id/conversation_address"
-            android:layout_toEndOf="@+id/conversation_image"
+            android:layout_toEndOf="@+id/draft_indicator"
             android:ellipsize="end"
             android:maxLines="1"
             android:paddingEnd="@dimen/activity_margin"