node-red/nodes/core/logic/19-batch.html

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<script type="text/x-red" data-template-name="batch">
    <div class="form-row">
        <label for="node-input-mode"><span data-i18n="batch.mode.label"></span></label>
        <select type="text" id="node-input-mode" style="width: 300px;">
            <option value="count" data-i18n="batch.mode.num-msgs"></option>
            <option value="interval" data-i18n="batch.mode.interval"></option>
            <option value="concat" data-i18n="batch.mode.concat"></option>
        </select>
    </div>

    <div class="node-row-msg-count">
        <div class="form-row node-row-count">
            <label style="margin-left: 10px; width: 175px;" for="node-input-count" data-i18n="batch.count.label"></label>
            <input type="text" id="node-input-count" style="width: 50px;">
        </div>
    </div>

    <div class="node-row-msg-overlap">
        <div class="form-row node-row-overlap">
            <label style="margin-left: 10px; width: 175px;" for="node-input-overlap" data-i18n="batch.count.overlap"></label>
            <input type="text" id="node-input-overlap" style="width: 50px;">
        </div>
    </div>

    <div class="node-row-msg-interval">
        <div class="form-row node-row-interval">
            <label style="margin-left: 10px; width: 175px;" for="node-input-interval"> <span data-i18n="batch.interval.label"></span></label>
            <input type="text" id="node-input-interval" style="width: 50px;">
            <span data-i18n="batch.interval.seconds"></span>
        </div>
        <div class="form-row">
            <input type="checkbox" id="node-input-allowEmptySequence" style="margin-left:20px; margin-right: 10px; vertical-align:top; width:auto;">
            <label for="node-input-allowEmptySequence" style="width:auto;" data-i18n="batch.interval.empty"></label>
	</div>
    </div>

    <div class="node-row-msg-concat">
        <div class="form-row">
            <label data-i18n="batch.concat.topics-label"></label>
            <div class="form-row node-input-topics-container-row">
                <ol id="node-input-topics-container"></ol>
            </div>
        </div>
    </div>

    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="node-red:common.label.name"></span></label>
        <input type="text" id="node-input-name" data-i18n="[placeholder]node-red:common.label.name">
    </div>

</script>

<script type="text/x-red" data-help-name="batch">
    <p>Creates sequences of messages based on various rules.</p>
    <h3>Details</h3>
    <p>There are three modes for creating message sequences:</p>
    <dl>
        <dt>Number of messages</dt>
        <dd>groups messages into sequences of a given length. The <b>overlap</b>
        option specifies how many messages at the end of one sequence should be
        repeated at the start of the next sequence.</dd>

        <dt>Time interval</dt>
        <dd>groups messages that arrive within the specified interval. If no messages
            arrive within the interval, the node can optionally send on an empty message.</dd>

        <dt>Concatenate Sequences</dt>
        <dd>creates a message sequence by concatenating incoming sequences. Each message
            must have a <code>msg.topic</code> property and a <code>msg.parts</code> property
            identifying its sequence. The node is configured with a list of <code>topic</code>
            values to identify the order sequences are concatenated.
            </dd>
        </dd>
    </dl>
    <h4>Storing messages</h4>
    <p>This node will buffer messages internally in order to work across sequences. The
       runtime setting <code>nodeMessageBufferMaxLength</code> can be used to limit how many messages nodes
       will buffer.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType("batch",{
        category: "function",
        color:"#E2D96E",
        defaults: {
            name: {value:""},
            mode: {value:"count"},
            count: {value:10},
            overlap: {value:0},
            interval: {value:10},
            allowEmptySequence: {value:false},
            topics: {value:[{topic:""}]}
        },
        inputs:1,
        outputs:1,
        icon: "batch.png",
        label: function() {
            return this.name || "batch";
        },
        labelStyle: function() {
            return this.name ? "node_label_italic" : "";
        },
        oneditprepare: function() {
            var node = this;
            var topic_str = node._("batch.concat.topic");

            function resizeTopics(topic) {
                var newWidth = topic.width();
                topic.find('.red-ui-typedInput')
                     .typedInput("width",newWidth-15);
            }

            $("#node-input-topics-container")
                .css('min-height','200px').css('min-width','430px')
                .editableList({
                    addItem: function(container, i, opt) {
                        if (!opt.hasOwnProperty('topic')) {
                            opt.topic = "";
                        }
                        var row = $('<div/>').appendTo(container);
                        var valueField = $('<input/>',{
                            class:"node-input-topic-value",
                            type:"text",
                            style:"margin-left: 5px;"
                        }).appendTo(row)
                        .typedInput({default:'str', types:['str']});
                        valueField.typedInput('value', opt.topic);
                        valueField.typedInput('type', 'str');
                        valueField.attr('placeholder', topic_str);
                        resizeTopics(container);
                    },
                    resizeItem: resizeTopics,
                    sortable: true,
                    removable: true
                });

            $("#node-input-count").spinner({
            });
            $("#node-input-overlap").spinner({
            });
            $("#node-input-interval").spinner({
            });
            $("#node-input-mode").change(function(e) {
                var val = $(this).val();
                $(".node-row-msg-count").toggle(val==="count");
                $(".node-row-msg-overlap").toggle(val==="count");
                $(".node-row-msg-interval").toggle(val==="interval");
                $(".node-row-msg-concat").toggle(val==="concat");
                if (val==="concat") {
                    var topics = node.topics;
                    var container = $("#node-input-topics-container");
                    container.editableList('empty');
                    for (var i = 0; i < topics.length; i++) {
                        var topic = topics[i];
                        container.editableList('addItem', topic);
                    }
                }
            });
        },
        oneditsave: function() {
            var topics = $("#node-input-topics-container").editableList('items');
            var node = this;
            node.topics = [];
            topics.each(function(i) {
                var topicData = $(this).data('data');
                var topic = $(this);
                var vf = topic.find(".node-input-topic-value");
                var value = vf.typedInput('value');
                var type = vf.typedInput('type');
                var r = {topic:value};
                node.topics.push(r);
            });
        },
        oneditresize: function(size) {
            var rows = $("#dialog-form>div:not(.node-input-topics-container-row)");
            var height = size.height;
            for (var i = 0; i < rows.size(); i++) {
                height -= $(rows[i]).outerHeight(true);
            }
            var editorRow = $("#dialog-form>div.node-input-topics-container-row");
            height -= (parseInt(editorRow.css("marginTop"))+parseInt(editorRow.css("marginBottom")));
            $("#node-input-topics-container").editableList('height',height);
        }
    });
</script>