Support for video and photo previews in chat window provided by Purvesh Sahoo as part of its GSoC project.

1 files changed, 130 insertions, 0 deletions

diff --git a/src/net/java/sip/communicator/impl/replacement/bliptv/ReplacementServiceBliptvImpl.java b/src/net/java/sip/communicator/impl/replacement/bliptv/ReplacementServiceBliptvImpl.java
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index 0000000..70fb553
--- /dev/null
+++ b/src/net/java/sip/communicator/impl/replacement/bliptv/ReplacementServiceBliptvImpl.java
@@ -0,0 +1,130 @@
+/*
+ * SIP Communicator, the OpenSource Java VoIP and Instant Messaging client.
+ * 
+ * Distributable under LGPL license. See terms of license at gnu.org.
+ */
+package net.java.sip.communicator.impl.replacement.bliptv;
+
+import java.io.*;
+import java.net.*;
+import java.util.regex.*;
+
+import org.json.*;
+
+import net.java.sip.communicator.service.replacement.*;
+import net.java.sip.communicator.util.*;
+
+/**
+ * Implements the {@link ReplacementService} to provide previews for Blip.tv
+ * links.
+ * 
+ * @author Purvesh Sahoo
+ */
+public class ReplacementServiceBliptvImpl
+    implements ReplacementService
+{
+    /**
+     * The logger for this class.
+     */
+    private static final Logger logger =
+        Logger.getLogger(ReplacementServiceBliptvImpl.class);
+
+    /**
+     * The regex used to match the link in the message.
+     */
+    public static final String BLIPTV_PATTERN =
+        "(?:[\\>])(http:\\/\\/(?:www\\.)?blip\\.tv\\/file\\/(\\d+).*(?=<))";
+
+    /**
+     * Configuration label property name. The label is saved in the languages
+     * file under this property.
+     */
+    public static final String BLIPTV_CONFIG_LABEL = "BLIPTV";
+
+    /**
+     * Constructor for <tt>ReplacementServiceBliptvImpl</tt>. The source needs
+     * to add itself to {@link ReplacementService} sourceList to be displayed in
+     * the configuration panel.
+     */
+    public ReplacementServiceBliptvImpl()
+    {
+        sourceList.add(BLIPTV_CONFIG_LABEL);
+        logger.trace("Creating a Blip.TV Source.");
+    }
+
+    /**
+     * Replaces the Blip.tv video links in the chat message with their
+     * corresponding thumbnails.
+     * 
+     * @param chatString the original chat message.
+     * @return replaced chat message with the thumbnail image; the original
+     *         message in case of no match.
+     */
+    public String getReplacedMessage(String chatString)
+    {
+        final Pattern p =
+            Pattern.compile(BLIPTV_PATTERN, Pattern.CASE_INSENSITIVE
+                | Pattern.DOTALL);
+        Matcher m = p.matcher(chatString);
+
+        int count = 0, startPos = 0;
+        StringBuffer msgBuff = new StringBuffer();
+
+        while (m.find())
+        {
+            count++;
+            msgBuff.append(chatString.substring(startPos, m.start()));
+            startPos = m.end();
+
+            try
+            {
+                String url = "http://oohembed.com/oohembed/?url=" + m.group(1);
+
+                URL sourceURL = new URL(url);
+                URLConnection conn = sourceURL.openConnection();
+
+                BufferedReader in =
+                    new BufferedReader(new InputStreamReader(conn
+                        .getInputStream()));
+
+                String inputLine, holder = "";
+
+                while ((inputLine = in.readLine()) != null)
+                    holder += inputLine;
+                in.close();
+
+                JSONObject wrapper = new JSONObject(holder);
+
+                String thumbUrl = wrapper.getString("thumbnail_url");
+
+                if (thumbUrl != null)
+                {
+                    msgBuff.append("<IMG HEIGHT=\"90\" WIDTH=\"120\" SRC=\"");
+                    msgBuff.append(thumbUrl);
+                    msgBuff.append("\"></IMG>");
+
+                }
+                else
+                {
+                    startPos = 0;
+                    msgBuff = new StringBuffer();
+                }
+
+            }
+            catch (Exception e)
+            {
+                startPos = 0;
+                msgBuff = new StringBuffer();
+                e.printStackTrace();
+            }
+
+        }
+
+        msgBuff.append(chatString.substring(startPos));
+
+        if (!msgBuff.toString().equals(chatString))
+            return msgBuff.toString();
+
+        return chatString;
+    }
+}
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