node-red/nodes/storage/67-leveldb.html

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<script type="text/x-red" data-template-name="leveldbase">
	<div class="form-row">
		<label for="node-config-input-db"><i class="icon-briefcase"></i> Database</label>
		<input type="text" id="node-config-input-db" placeholder="database path/name">
	</div>
</script>

<script type="text/javascript">
	RED.nodes.registerType('leveldbase',{
		category: 'config',
		defaults: {
			db: {value:"",required:true}
		},
		label: function() {
			return this.db;
		}
	});
</script>

<script type="text/x-red" data-template-name="leveldb in">
	<div class="form-row node-input-level">
		<label for="node-input-level"><i class="icon-briefcase"></i> Database</label>
		<input type="text" id="node-input-level">
	</div>
	<div class="form-row">
		<label for="node-input-name"><i class="icon-tag"></i> Name</label>
		<input type="text" id="node-input-name" placeholder="Name">
	</div>
</script>

<script type="text/x-red" data-help-name="leveldb in">
	<p>Uses <a href="https://code.google.com/p/leveldb/" target="_new"><i>LevelDB</i></a> for a simple key value pair database.</p>
	<p>Use this node to <b>get</b>, or retrieve the data already saved in the database.</p>
	<p><b>msg.topic</b> must hold the <i>key</i> for the database, and the result is returned in <b>msg.payload</b>.</p>
</script>

<script type="text/javascript">
	RED.nodes.registerType('leveldb in',{
		category: 'storage-input',
		color:"#dbb84d",
		defaults: {
			level: {type:"leveldbase",required:true},
			name: {value:""}
		},
		inputs:1,
		outputs:1,
		icon: "leveldb.png",
		label: function() {
			var levelNode = RED.nodes.node(this.level);
			return this.name||(levelNode?levelNode.label():"leveldb");
		},
			labelStyle: function() {
			return this.name?"node_label_italic":"";
		}
	});
</script>


<script type="text/x-red" data-template-name="leveldb out">
	<div class="form-row node-input-level">
		<label for="node-input-level"><i class="icon-briefcase"></i> Database</label>
		<input type="text" id="node-input-level">
	</div>
	<div class="form-row">
		<label for="node-input-name"><i class="icon-tag"></i> Name</label>
		<input type="text" id="node-input-name" placeholder="Name">
	</div>
</script>


<script type="text/x-red" data-help-name="leveldb out">
	<p>Uses <a href="https://code.google.com/p/leveldb/" target="_new"><i>LevelDB</i></a> for a simple key value pair database.</p>
	<p>Use this node to <b>put</b> (save) the <b>msg.payload</b> to the named database file, using <b>msg.topic</b> as the key.</p>
	<p>To <b>delete</b> information do a <b>put</b> to the required <b>msg.topic</b> (key) with a <b>msg.payload</b> of <b><i>null</i></b>.</p>
</script>

<script type="text/javascript">
	RED.nodes.registerType('leveldb out',{
		category: 'storage-output',
		color:"#dbb84d",
		defaults: {
			level: {type:"leveldbase",required:true},
			op: {value:"put",required:true},
			name: {value:""}
		},
		inputs:1,
		outputs:0,
		icon: "leveldb.png",
		align: "right",
		label: function() {
			var levelNode = RED.nodes.node(this.level);
			return this.name||(levelNode?levelNode.label():"leveldb");
		},
			labelStyle: function() {
			return this.name?"node_label_italic":"";
		}
	});
</script>