nfc/ndefTagReading/index.html

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 * Copyright 2012 Research In Motion Limited.
 *
 * 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
 *
 *     http://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.
-->
<html>

<script src="local:///chrome/webworks.js">
</script>

<script src="js/blackberrynfc.ndef.js">
	
</script>

<style>
TD,INPUT,BODY {
	font-size: 25pt;
}
</style>

<script type="text/javascript">
	// Create some aliases to save some typing.
	var WELL_KNOWN = blackberrynfc.ndef.tnf.WELL_KNOWN;
	var decodeRecords = blackberrynfc.ndef.message.decodeRecords;
	
	// Aliases for record creation functions.
	var createTextRecord = blackberrynfc.ndef.message.createTextRecord;
	var createURIRecord = blackberrynfc.ndef.message.createURIRecord;
	var createSpRecord = blackberrynfc.ndef.message.createSpRecord;

	// When a tag is read by the OS - this handler will be triggered.
	function onInvoked(onInvokedInfo) {
		try {
			if ("com.robwilliams.d20121122.ww.a" == onInvokedInfo.target
					&& onInvokedInfo.data) {

				// Convert the bytes to records.
				var records = decodeRecords(onInvokedInfo.data);

				if (records.length > 0) {
					var record = records[0];
					if (record.isType(WELL_KNOWN, "Sp")) {
						alert("Read a smart poster\n" + record.getText() + "\n"
								+ record.getURI());
					} else {
						alert("Read a non smart poster...");
					}
				} else {
					alert("Message contained no (decodable) records...");
				}

				// Purely diagnostic code...
				var output = document.getElementById("output");
				output.innerHTML = records[0].getEncodedAsHTML();
			} else {
				alert("Didn't understand this invokation...");
			}
		} catch (e) {
			alert(e);
		}
	}
	
	function shareTag() {
		try {
			var text = document.getElementById("tagText").value;
			var uri = document.getElementById("tagUri").value;
			if (text=="" || uri=="") {
				alert("Please enter text for both fields...");
				return;
			}
			
			var textRecord = createTextRecord("en",text);
			var uriRecord =	createURIRecord(uri);
			var records = Array(textRecord,uriRecord);
			var spRecord = createSpRecord(records);
			var data = spRecord.getEncoded("invoke");
		
			var query = {
					"action": "bb.action.SHARE",
					"type": "application/vnd.rim.nfc.ndef",
					"data": data
			};
			
			blackberry.invoke.invoke(query,shareGood,shareBad);
		} catch (e) {
			alert(e);
		}
	}

	function shareGood() {
		// The share was invoked...
	}
	
	function shareBad(error) {
		alert("Could not share: " + error);
	}

	// Register the invokation handler.
	function ready() {
		try {
			blackberry.event.addEventListener("invoked", onInvoked);
		} catch (e) {
			alert(e);
		}
	}
	window.addEventListener("load", function(e) {
		document.addEventListener("webworksready", ready)
	}, false);
</script>
<body>
	<h1>Scan a tag!</h1>
	Please!
	<div id='output'>Tag contents will go here.</div>
	<hr />
	<h1>Create a basic Smart Poster</h1>
	<table>
		<tbody>
			<tr>
				<td>Text:</td>
				<td><input type='text' id='tagText' /></td>
			</tr>
			<tr>
				<td>Uri:</td>
				<td><input type='text' id='tagUri' /></td>
			<tr>
				<td></td>
				<td><input type='button' value='Share Tag' onClick='shareTag()' /></td>
			</tr>
		</tbody>
	</table>
</body>

</html>