Create polls (#1452)

* add AddPollDialog

* add support for pleroma poll options

* add PollPreviewView

* add Poll support to drafts

* add license header, cleanup

* rename drawable files to correct size

* fix tests

* fix bug with Poll having wrong duration after delete&redraft

* add input validation

* grey out poll button when its disabled

* code cleanup & small improvements

app/src/main/java/com/keylesspalace/tusky/entity/Instance.kt

@@ -29,7 +29,8 @@ data class Instance (
         val languages: List<String>,
         @SerializedName("contact_account") val contactAccount: Account,
         @SerializedName("max_toot_chars") val maxTootChars: Int?,
-        @SerializedName("max_bio_chars") val maxBioChars: Int?
+        @SerializedName("max_bio_chars") val maxBioChars: Int?,
+        @SerializedName("poll_limits") val pollLimits: PollLimits?
 ) {
     override fun hashCode(): Int {
         return uri.hashCode()
@@ -44,3 +45,7 @@ data class Instance (
     }
 }
 
+data class PollLimits (
+        @SerializedName("max_options") val maxOptions: Int?,
+        @SerializedName("max_option_chars") val maxOptionChars: Int?
+)

app/src/main/java/com/keylesspalace/tusky/entity/NewStatus.kt

@@ -0,0 +1,37 @@
+/* Copyright 2019 Tusky Contributors
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.entity
+
+import android.os.Parcelable
+import com.google.gson.annotations.SerializedName
+import kotlinx.android.parcel.Parcelize
+
+data class NewStatus(
+        val status: String,
+        @SerializedName("spoiler_text") val warningText: String,
+        @SerializedName("in_reply_to_id") val inReplyToId: String?,
+        val visibility: String,
+        val sensitive: Boolean,
+        @SerializedName("media_ids") val mediaIds: List<String>?,
+        val poll: NewPoll?
+)
+
+@Parcelize
+data class NewPoll(
+        val options: List<String>,
+        @SerializedName("expires_in") val expiresIn: Int,
+        val multiple: Boolean
+): Parcelable

app/src/main/java/com/keylesspalace/tusky/entity/Poll.kt

@@ -25,6 +25,14 @@ data class Poll(
         return copy(options = newOptions, votesCount = votesCount + choices.size, voted = true)
     }
 
+    fun toNewPoll(creationDate: Date) = NewPoll(
+            options.map { it.title },
+            expiresAt?.let {
+                ((it.time - creationDate.time) / 1000).toInt() + 1
+            }?: 3600,
+            multiple
+    )
+
 }
 
 data class PollOption(