allow updating CalDAV calendar color with the predefined colors

app/src/main/kotlin/com/simplemobiletools/calendar/dialogs/SelectEventTypeColorDialog.kt

@@ -0,0 +1,61 @@
+package com.simplemobiletools.calendar.dialogs
+
+import android.app.Activity
+import android.graphics.Color
+import android.support.v7.app.AlertDialog
+import android.view.ViewGroup
+import android.widget.RadioButton
+import android.widget.RadioGroup
+import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.extensions.config
+import com.simplemobiletools.calendar.helpers.CalDAVHandler
+import com.simplemobiletools.calendar.models.EventType
+import com.simplemobiletools.commons.extensions.setBackgroundWithStroke
+import com.simplemobiletools.commons.extensions.setupDialogStuff
+import kotlinx.android.synthetic.main.dialog_select_radio_group.view.*
+import kotlinx.android.synthetic.main.radio_button_with_color.view.*
+
+class SelectEventTypeColorDialog(val activity: Activity, val eventType: EventType, val callback: (color: Int) -> Unit) {
+    private val dialog: AlertDialog?
+    private val radioGroup: RadioGroup
+    private var wasInit = false
+    private val colors = CalDAVHandler(activity).getAvailableCalDAVCalendarColors(eventType)
+
+    init {
+        val view = activity.layoutInflater.inflate(R.layout.dialog_select_radio_group, null) as ViewGroup
+        radioGroup = view.dialog_radio_group
+
+        colors.forEachIndexed { index, value ->
+            addRadioButton(index, value)
+        }
+
+        wasInit = true
+        dialog = AlertDialog.Builder(activity)
+                .create().apply {
+            activity.setupDialogStuff(view, this)
+        }
+    }
+
+    private fun addRadioButton(colorKey: Int, color: Int) {
+        val view = activity.layoutInflater.inflate(R.layout.radio_button_with_color, null)
+        (view.dialog_radio_button as RadioButton).apply {
+            text = String.format("#%06X", 0xFFFFFF and color)
+            isChecked = color == eventType.color
+            id = colorKey
+        }
+
+        if (color != Color.TRANSPARENT)
+            view.dialog_radio_color.setBackgroundWithStroke(color, activity.config.backgroundColor)
+
+        view.setOnClickListener { viewClicked(colorKey) }
+        radioGroup.addView(view, RadioGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT))
+    }
+
+    private fun viewClicked(colorKey: Int) {
+        if (!wasInit)
+            return
+
+        callback.invoke(colors[colorKey])
+        dialog?.dismiss()
+    }
+}

app/src/main/kotlin/com/simplemobiletools/calendar/dialogs/UpdateEventTypeDialog.kt

@@ -26,9 +26,16 @@ class UpdateEventTypeDialog(val activity: Activity, var eventType: EventType? =
             setupColor(type_color)
             type_title.setText(eventType!!.title)
             type_color.setOnClickListener {
-                ColorPickerDialog(activity, eventType!!.color) {
-                    eventType!!.color = it
-                    setupColor(type_color)
+                if (eventType?.caldavCalendarId == 0) {
+                    ColorPickerDialog(activity, eventType!!.color) {
+                        eventType!!.color = it
+                        setupColor(type_color)
+                    }
+                } else {
+                    SelectEventTypeColorDialog(activity, eventType!!) {
+                        eventType!!.color = it
+                        setupColor(type_color)
+                    }
                 }
             }
         }

app/src/main/kotlin/com/simplemobiletools/calendar/helpers/CalDAVHandler.kt

@@ -73,7 +73,9 @@ class CalDAVHandler(val context: Context) {
     }
 
     private fun fillCalendarContentValues(eventType: EventType): ContentValues {
+        val colorKey = getEventTypeColorKey(eventType)
         return ContentValues().apply {
+            put(CalendarContract.Calendars.CALENDAR_COLOR_KEY, colorKey)
             put(CalendarContract.Calendars.CALENDAR_DISPLAY_NAME, eventType.title)
         }
     }
@@ -94,9 +96,10 @@ class CalDAVHandler(val context: Context) {
             cursor?.close()
         }
 
-        return insertNewColor(eventType)
+        return -1
     }
 
+    // it doesnt work properly, needs better SyncAdapter handling
     private fun insertNewColor(eventType: EventType): Int {
         val maxId = getMaxColorId(eventType) + 1
 
@@ -143,6 +146,28 @@ class CalDAVHandler(val context: Context) {
         return maxId
     }
 
+    fun getAvailableCalDAVCalendarColors(eventType: EventType): ArrayList<Int> {
+        val colors = ArrayList<Int>()
+        val uri = CalendarContract.Colors.CONTENT_URI
+        val projection = arrayOf(CalendarContract.Colors.COLOR)
+        val selection = "${CalendarContract.Colors.COLOR_TYPE} = ? AND ${CalendarContract.Colors.ACCOUNT_NAME} = ?"
+        val selectionArgs = arrayOf(CalendarContract.Colors.TYPE_CALENDAR.toString(), eventType.caldavEmail)
+
+        var cursor: Cursor? = null
+        try {
+            cursor = context.contentResolver.query(uri, projection, selection, selectionArgs, null)
+            if (cursor != null && cursor.moveToFirst()) {
+                do {
+                    colors.add(cursor.getIntValue(CalendarContract.Colors.COLOR))
+                } while (cursor.moveToNext())
+            }
+        } finally {
+            cursor?.close()
+        }
+
+        return colors
+    }
+
     private fun fetchCalDAVCalendarEvents(calendarId: Int, eventTypeId: Int) {
         val importIdsMap = HashMap<String, Event>()
         val fetchedEventIds = ArrayList<String>()