chunk 2: remaining non-audio non-NewImport assets

Assets/GooglePlayPlugins/com.google.play.assetdelivery/Runtime/Scripts/PlayAssetBundleRequest.cs

@@ -0,0 +1,92 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+using UnityEngine;
+
+namespace Google.Play.AssetDelivery
+{
+    /// <summary>
+    /// A <a href="https://docs.unity3d.com/ScriptReference/CustomYieldInstruction.html">CustomYieldInstruction</a>
+    /// used to monitor the asynchronous retrieval of an asset pack containing an AssetBundle.
+    /// </summary>
+    public abstract class PlayAssetBundleRequest : CustomYieldInstruction
+    {
+        /// <summary>
+        /// Progress between 0 and 1 indicating the overall download progress of this request.
+        ///
+        /// Note: If this value is equal to 1, it does not mean that the request has completed,
+        /// only that the Downloading stage is finished.
+        /// </summary>
+        public virtual float DownloadProgress { get; protected set; }
+
+        /// <summary>
+        /// The error that prevented this requested from completing successfully.
+        /// In the case of a successful request, this will always be <see cref="AssetDeliveryErrorCode.NoError"/>.
+        /// </summary>
+        public virtual AssetDeliveryErrorCode Error { get; protected set; }
+
+        /// <summary>
+        /// Returns true if this request is in the <see cref="AssetDeliveryStatus.Loaded"/> or
+        /// <see cref="AssetDeliveryStatus.Failed"/> status, false otherwise.
+        /// </summary>
+        public bool IsDone { get; protected set; }
+
+        /// <summary>
+        /// An enum indicating the status of this request (downloading, downloaded, installed etc.)
+        /// If the request completed successfully, this value should be <see cref="AssetDeliveryStatus.Loaded"/>.
+        /// If an error occured, it should be <see cref="AssetDeliveryStatus.Failed"/>.
+        /// </summary>
+        public virtual AssetDeliveryStatus Status { get; protected set; }
+
+        /// <summary>
+        /// The AssetBundle loaded by this request.
+        /// This corresponds to the AssetBundle name passed into this request.
+        /// If Status is not <see cref="AssetDeliveryStatus.Loaded"/>, this value is null.
+        /// </summary>
+        public AssetBundle AssetBundle { get; protected set; }
+
+        /// <summary>
+        /// Event indicating that the request is completed. If an event handler is registered after the operation has
+        /// completed, and thus after this event has been invoked, then the handler will be called synchronously.
+        /// </summary>
+        public virtual event Action<PlayAssetBundleRequest> Completed = delegate { };
+
+        /// <summary>
+        /// Implements the <a href="https://docs.unity3d.com/ScriptReference/CustomYieldInstruction-keepWaiting.html">CustomYieldInstruction.keepWaiting</a>
+        /// property so that this request can be yielded on in a coroutine.
+        /// </summary>
+        public override bool keepWaiting
+        {
+            get { return !IsDone; }
+        }
+
+        /// <summary>
+        /// Cancels the request if possible, setting Status to <see cref="AssetDeliveryStatus.Failed"/> and
+        /// Error to <see cref="AssetDeliveryErrorCode.Canceled"/>.
+        /// If the request is already <see cref="AssetDeliveryStatus.Loading"/>,
+        /// <see cref="AssetDeliveryStatus.Loaded"/> or <see cref="AssetDeliveryStatus.Failed"/>, then
+        /// the request is left unchanged.
+        /// </summary>
+        public abstract void AttemptCancel();
+
+        /// <summary>
+        /// Invokes the <see cref="Completed"/> event.
+        /// </summary>
+        protected void InvokeCompletedEvent()
+        {
+            Completed.Invoke(this);
+        }
+    }
+}