From 041bafcceadbd5203e95f2692899ac903dd2e883 Mon Sep 17 00:00:00 2001
From: Allan Wang <me@allanwang.ca>
Date: Fri, 29 Dec 2017 23:37:10 -0500
Subject: Feature/image retrieval (#581)

* Refactor

* Attempt new content

* Clean up to make compile friendly

* Update docs
---
 .../pitchedapps/frost/facebook/requests/Images.kt  | 67 ++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt

(limited to 'app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt')

diff --git a/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt b/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt
new file mode 100644
index 00000000..61a94ac5
--- /dev/null
+++ b/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt
@@ -0,0 +1,67 @@
+package com.pitchedapps.frost.facebook.requests
+
+import com.bumptech.glide.Priority
+import com.bumptech.glide.load.DataSource
+import com.bumptech.glide.load.data.DataFetcher
+import com.pitchedapps.frost.facebook.FB_URL_BASE
+import okhttp3.Call
+import okhttp3.Request
+import java.io.IOException
+import java.io.InputStream
+
+/**
+ * Created by Allan Wang on 29/12/17.
+ */
+fun RequestAuth.getFullSizedImage(fbid: Long) = frostRequest(::getJsonUrl) {
+    url("${FB_URL_BASE}photo/view_full_size/?fbid=$fbid&__ajax__=&__user=$userId")
+    get()
+}
+
+class ImageFbidFetcher(private val fbid: Long,
+                       private val cookie: String) : DataFetcher<InputStream> {
+
+    @Volatile private var cancelled: Boolean = false
+    private var urlCall: Call? = null
+    private var inputStream: InputStream? = null
+
+    private fun DataFetcher.DataCallback<in InputStream>.fail(msg: String) {
+        onLoadFailed(RuntimeException(msg))
+    }
+
+    override fun getDataClass(): Class<InputStream> = InputStream::class.java
+
+    override fun getDataSource(): DataSource = DataSource.REMOTE
+
+    override fun loadData(priority: Priority, callback: DataFetcher.DataCallback<in InputStream>) {
+        cookie.fbRequest(fail = { callback.fail("Invalid auth") }) {
+            if (cancelled) return@fbRequest callback.fail("Cancelled")
+            val url = getFullSizedImage(fbid).invoke() ?: return@fbRequest callback.fail("Null url")
+            if (cancelled) return@fbRequest callback.fail("Cancelled")
+            urlCall = Request.Builder().url(url).get().call()
+
+            inputStream = try {
+                urlCall?.execute()?.body()?.byteStream()
+            } catch (e: IOException) {
+                null
+            }
+
+            callback.onDataReady(inputStream)
+        }
+    }
+
+    override fun cleanup() {
+        try {
+            inputStream?.close()
+        } catch (e: IOException) {
+        } finally {
+            inputStream = null
+        }
+    }
+
+    override fun cancel() {
+        cancelled = true
+        urlCall?.cancel()
+        urlCall = null
+        cleanup()
+    }
+}
-- 
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