node-red/nodes/core/logic/15-change.html

<script type="text/x-red" data-template-name="change">
    <div class="form-row">
        <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="common.label.name"></span></label>
        <input type="text" id="node-input-name" data-i18n="[placeholder]common.label.name">
    </div>
    <div class="form-row" style="margin-bottom:0;">
        <label><i class="fa fa-list"></i> <span data-i18n="change.label.rules"></span></label>
    </div>
    <div class="form-row node-input-rule-container-row">
        <ol id="node-input-rule-container"></ol>
    </div>
</script>

<script type="text/x-red" data-help-name="change">
    <p>Set, change, delete or move properties of a message, flow context or global context.</p>
    <p>The node can specify multiple rules that will be applied in turn.</p>
    <h3>Options</h3>
    <p>The available operations are:</p>
    <dl class="message-properties">
    <dt>Set</dt>
    <dd>set a property. The value can be a variety of different types, or
            can be taken from an existing message or context property.</dd>
    <dt>Change</dt>
    <dd>search &amp; replace parts of the property. If regular expressions
        are enabled, the "replace with" property can include capture groups, for
        example <code>$1</code>. Replace will only change the type if there
        is a complete match.</dd>
    <dt>Delete</dt>
    <dd>delete a property.</dd>
    <dt>Move</dt>
    <dd>move or rename a property.</dt>
    </dl>
    <h3>Details</h3>
    <p>The "expression" type uses the <a href="http://jsonata.org/" target="_new">JSONata</a>
    query and expression language. A tool is available to test expressions against
    real data <a href="http://try.jsonata.org/" target="_new">here</a>.
    </p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('change', {
        color: "#E2D96E",
        category: 'function',
        defaults: {
            name: {value:""},
            rules:{value:[{t:"set",p:"payload",pt:"msg",to:"",tot:"str"}]},
            // legacy
            action: {value:""},
            property: {value:""},
            from: {value:""},
            to: {value:""},
            reg: {value:false}
        },
        inputs: 1,
        outputs: 1,
        icon: "swap.png",
        label: function() {
            if (this.name) {
                return this.name;
            }
            if (!this.rules) {
                if (this.action === "replace") {
                    return this._("change.label.set",{property:"msg."+this.property});
                } else if (this.action === "change") {
                    return this._("change.label.change",{property:"msg."+this.property});
                } else if (this.action === "move") {
                    return this._("change.label.move",{property:"msg."+this.property});
                } else {
                    return this._("change.label.delete",{property:"msg."+this.property});
                }
            } else {
                if (this.rules.length == 1) {
                    if (this.rules[0].t === "set") {
                        return this._("change.label.set",{property:(this.rules[0].pt||"msg")+"."+this.rules[0].p});
                    } else if (this.rules[0].t === "change") {
                        return this._("change.label.change",{property:(this.rules[0].pt||"msg")+"."+this.rules[0].p});
                    } else if (this.rules[0].t === "move") {
                        return this._("change.label.move",{property:(this.rules[0].pt||"msg")+"."+this.rules[0].p});
                    } else {
                        return this._("change.label.delete",{property:(this.rules[0].pt||"msg")+"."+this.rules[0].p});
                    }
                } else {
                    return this._("change.label.changeCount",{count:this.rules.length});
                }
            }
        },
        labelStyle: function() {
            return this.name ? "node_label_italic" : "";
        },
        oneditprepare: function() {
            var set = this._("change.action.set");
            var change = this._("change.action.change");
            var del = this._("change.action.delete");
            var move = this._("change.action.move");
            var to = this._("change.action.to");
            var search = this._("change.action.search");
            var replace = this._("change.action.replace");
            var regex = this._("change.label.regex");

            function resizeRule(rule) {
                var newWidth = rule.width();
                rule.find('.red-ui-typedInput').typedInput("width",newWidth-150);

            }
            $('#node-input-rule-container').css('min-height','300px').css('min-width','450px').editableList({
                addItem: function(container,i,opt) {
                    var rule = opt;
                    if (!rule.hasOwnProperty('t')) {
                        rule = {t:"set",p:"payload",to:"",tot:"str"};
                    }
                    if (rule.t === "change" && rule.re) {
                        rule.fromt = 're';
                        delete rule.re;
                    }
                    if (rule.t === "set" && !rule.tot) {
                        if (rule.to.indexOf("msg.") === 0 && !rule.tot) {
                            rule.to = rule.to.substring(4);
                            rule.tot = "msg";
                        } else {
                            rule.tot = "str";
                        }
                    }
                    if (rule.t === "move" && !rule.tot) {
                        rule.tot = "msg";
                    }

                    var row1 = $('<div/>').appendTo(container);
                    var row2 = $('<div/>',{style:"margin-top:8px;"}).appendTo(container);
                    var row3 = $('<div/>',{style:"margin-top:8px;"}).appendTo(container);
                    var row4 = $('<div/>',{style:"margin-top:8px;"}).appendTo(container);

                    var selectField = $('<select/>',{class:"node-input-rule-type",style:"width:110px; margin-right:10px;"}).appendTo(row1);
                    var selectOptions = [{v:"set",l:set},{v:"change",l:change},{v:"delete",l:del},{v:"move",l:move}];
                    for (var i=0; i<4; i++) {
                        selectField.append($("<option></option>").val(selectOptions[i].v).text(selectOptions[i].l));
                    }

                    var propertyName = $('<input/>',{class:"node-input-rule-property-name",type:"text"})
                        .appendTo(row1)
                        .typedInput({types:['msg','flow','global']});

                    $('<div/>',{style:"display:inline-block;text-align:right; width:120px; padding-right:10px; box-sizing:border-box;"})
                        .text(to)
                        .appendTo(row2);
                    var propertyValue = $('<input/>',{class:"node-input-rule-property-value",type:"text"})
                        .appendTo(row2)
                        .typedInput({default:'str',types:['msg','flow','global','str','num','bool','json','date','jsonata']});

                    var row3_1 = $('<div/>').appendTo(row3);
                    $('<div/>',{style:"display:inline-block;text-align:right; width:120px; padding-right:10px; box-sizing:border-box;"})
                        .text(search)
                        .appendTo(row3_1);
                    var fromValue = $('<input/>',{class:"node-input-rule-property-search-value",type:"text"})
                        .appendTo(row3_1)
                        .typedInput({default:'str',types:['msg','flow','global','str','re','num','bool']});

                    var row3_2 = $('<div/>',{style:"margin-top:8px;"}).appendTo(row3);
                    $('<div/>',{style:"display:inline-block;text-align:right; width:120px; padding-right:10px; box-sizing:border-box;"})
                        .text(replace)
                        .appendTo(row3_2);
                    var toValue = $('<input/>',{class:"node-input-rule-property-replace-value",type:"text"})
                        .appendTo(row3_2)
                        .typedInput({default:'str',types:['msg','flow','global','str','num','bool','json']});

                    $('<div/>',{style:"display:inline-block;text-align:right; width:120px; padding-right:10px; box-sizing:border-box;"})
                        .text(to)
                        .appendTo(row4);
                    var moveValue = $('<input/>',{class:"node-input-rule-property-move-value",type:"text"})
                        .appendTo(row4)
                        .typedInput({default:'msg',types:['msg','flow','global']});

                    selectField.change(function() {
                        var width = $("#node-input-rule-container").width();
                        var type = $(this).val();
                        if (type == "set") {
                            row2.show();
                            row3.hide();
                            row4.hide();
                        } else if (type == "change") {
                            row2.hide();
                            row3.show();
                            row4.hide();
                        } else if (type == "delete") {
                            row2.hide();
                            row3.hide();
                            row4.hide();
                        } else if (type == "move") {
                            row2.hide();
                            row3.hide();
                            row4.show();
                        }
                        resizeRule(container);
                    });

                    selectField.val(rule.t);
                    propertyName.typedInput('value',rule.p);
                    propertyName.typedInput('type',rule.pt);
                    propertyValue.typedInput('value',rule.to);
                    propertyValue.typedInput('type',rule.tot);
                    moveValue.typedInput('value',rule.to);
                    moveValue.typedInput('type',rule.tot);
                    fromValue.typedInput('value',rule.from);
                    fromValue.typedInput('type',rule.fromt);
                    toValue.typedInput('value',rule.to);
                    toValue.typedInput('type',rule.tot);
                    selectField.change();

                    var newWidth = $("#node-input-rule-container").width();
                    resizeRule(container);
                },
                resizeItem: resizeRule,
                removable: true,
                sortable: true
            });

            if (!this.rules) {
                var rule = {
                    t:(this.action=="replace"?"set":this.action),
                    p:this.property,
                    pt:"msg"
                };

                if ((rule.t === "set")||(rule.t === "move")) {
                    rule.to = this.to;
                } else if (rule.t === "change") {
                    rule.from = this.from;
                    rule.to = this.to;
                    rule.re = this.reg;
                }

                delete this.to;
                delete this.from;
                delete this.reg;
                delete this.action;
                delete this.property;

                this.rules = [rule];
            }

            for (var i=0; i<this.rules.length; i++) {
                var rule = this.rules[i];
                $("#node-input-rule-container").editableList('addItem',rule);
            }
        },
        oneditsave: function() {
            var rules = $("#node-input-rule-container").editableList('items');
            var ruleset;
            var node = this;
            node.rules= [];
            rules.each(function(i) {
                var rule = $(this);
                var type = rule.find(".node-input-rule-type").val();
                var r = {
                    t:type,
                    p:rule.find(".node-input-rule-property-name").typedInput('value'),
                    pt:rule.find(".node-input-rule-property-name").typedInput('type')
                };
                if (type === "set") {
                    r.to = rule.find(".node-input-rule-property-value").typedInput('value');
                    r.tot = rule.find(".node-input-rule-property-value").typedInput('type');
                } else if (type === "move") {
                    r.to = rule.find(".node-input-rule-property-move-value").typedInput('value');
                    r.tot = rule.find(".node-input-rule-property-move-value").typedInput('type');
                } else if (type === "change") {
                    r.from = rule.find(".node-input-rule-property-search-value").typedInput('value');
                    r.fromt = rule.find(".node-input-rule-property-search-value").typedInput('type');
                    r.to = rule.find(".node-input-rule-property-replace-value").typedInput('value');
                    r.tot = rule.find(".node-input-rule-property-replace-value").typedInput('type');
                }
                node.rules.push(r);
            });
        },
        oneditresize: function(size) {
            var rows = $("#dialog-form>div:not(.node-input-rule-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-rule-container-row");
            height -= (parseInt(editorRow.css("marginTop"))+parseInt(editorRow.css("marginBottom")));

            $("#node-input-rule-container").editableList('height',height);
        }
    });
</script>