Added Android code

[wl-app.git] / Android / folioreader / src / main / java / com / folioreader / ui / base / ManifestTask.java

diff --git a/Android/folioreader/src/main/java/com/folioreader/ui/base/ManifestTask.java b/Android/folioreader/src/main/java/com/folioreader/ui/base/ManifestTask.java
new file mode 100755 (executable)
index 0000000..c6e06bd
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+++ b/Android/folioreader/src/main/java/com/folioreader/ui/base/ManifestTask.java
@@ -0,0 +1,83 @@
+package com.folioreader.ui.base;
+
+import android.os.AsyncTask;
+import android.util.Log;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.folioreader.util.AppUtil;
+
+import org.readium.r2_streamer.model.publication.EpubPublication;
+import org.readium.r2_streamer.model.tableofcontents.TOCLink;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.net.URLConnection;
+
+/**
+ * Background async task which makes API call to get Epub publication
+ * manifest from server
+ *
+ * @author by gautam on 12/6/17.
+ */
+
+public class ManifestTask extends AsyncTask<String, Void, EpubPublication> {
+
+    private static final String TAG = "ManifestTask";
+
+    private ManifestCallBack manifestCallBack;
+
+    public ManifestTask(ManifestCallBack manifestCallBack) {
+        this.manifestCallBack = manifestCallBack;
+    }
+
+    @Override
+    protected EpubPublication doInBackground(String... urls) {
+        String strUrl = urls[0];
+
+        try {
+            URL url = new URL(strUrl);
+            URLConnection urlConnection = url.openConnection();
+            InputStream inputStream = urlConnection.getInputStream();
+            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, AppUtil.charsetNameForURLConnection(urlConnection)));
+            StringBuilder stringBuilder = new StringBuilder();
+            String line;
+            while ((line = bufferedReader.readLine()) != null) {
+                stringBuilder.append(line);
+            }
+
+            ObjectMapper objectMapper = new ObjectMapper();
+            return objectMapper.readValue(stringBuilder.toString(), EpubPublication.class);
+        } catch (IOException e) {
+            Log.e(TAG, "ManifestTask failed", e);
+        }
+        return null;
+    }
+
+    @Override
+    protected void onPostExecute(EpubPublication publication) {
+        if (publication != null) {
+            //TODO can be implemented in r2-streamer?
+            if (publication.tableOfContents != null) {
+                for (TOCLink link : publication.tableOfContents) {
+                    setBookTitle(link, publication);
+                }
+            }
+            manifestCallBack.onReceivePublication(publication);
+        } else {
+            manifestCallBack.onError();
+        }
+        cancel(true);
+    }
+
+    private void setBookTitle(TOCLink link, EpubPublication publication) {
+        for (int i = 0; i < publication.spines.size(); i++) {
+            if (publication.spines.get(i).href.equals(link.href)) {
+                publication.spines.get(i).bookTitle = link.bookTitle;
+                return;
+            }
+        }
+    }
+}
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