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

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  Copyright 2013, 2015 IBM Corp.

  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.
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<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" style="margin-bottom: 0px;">
        <div id="node-input-rule-container-div" style="box-sizing: border-box; border-radius: 5px; height: 300px; padding: 5px; border: 1px solid #ccc; overflow-y:scroll;">
            <ol id="node-input-rule-container" style=" list-style-type:none; margin: 0;"></ol>
        </div>
    </div>
    <div class="form-row">
        <a href="#" class="editor-button" id="node-input-add-rule" style="margin-top: 4px;"><i class="fa fa-plus"></i> <span data-i18n="change.label.rule"></span></a>
    </div>
</script>

<script type="text/x-red" data-help-name="change">
    <p>Set, change or delete properties of a message.</p>
    <p>The node can specify multiple rules that will be applied to the message in turn.</p>
    <p>The available operations are:</p>
    <ul>
        <li><b>Set</b> - set a property. The <b>to</b> property can either be a string value, or reference
         another message property by name, for example: <code>msg.topic</code>.</li>
        <li><b>Change</b> - search &amp; replace parts of the property. If regular expressions
            are enabled, the <b>replace with</b> property can include capture groups, for example <code>$1</code></li>
        <li><b>Delete</b> - delete a property.</li>
    </ul>
</script>

<script type="text/javascript">
    RED.nodes.registerType('change', {
        color: "#E2D96E",
        category: 'function',
        defaults: {
            name: {value:""},
            rules:{value:[{t:"set",p:"payload",to:""}]},
            // 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 {
                    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:"msg."+this.rules[0].p});
                    } else if (this.rules[0].t === "change") {
                        return this._("change.label.change",{property:"msg."+this.rules[0].p});
                    } else {
                        return this._("change.label.delete",{property:"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 to = this._("change.action.to");
            var search = this._("change.action.search");
            var replace = this._("change.action.replace");
            var regex = this._("change.label.regex");
            if (this.reg === null) { $("#node-input-reg").prop('checked', true); }
            $("#node-input-action").change();

            function generateRule(rule) {
                var container = $('<li/>',{style:"background: #fff; margin:0; padding:8px 0px; border-bottom: 1px solid #ccc;"});

                var row1 = $('<div/>').appendTo(container);

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

                var selectField = $('<select/>',{class:"node-input-rule-type",style:"width: 100px"}).appendTo(row1);
                var selectOptions = [{v:"set",l:set},{v:"change",l:change},{v:"delete",l:del}];
                for (var i=0;i<3;i++) {
                    selectField.append($("<option></option>").val(selectOptions[i].v).text(selectOptions[i].l));
                }

                $('<div/>',{style:"display:inline-block; width: 50px; text-align: right;"}).text("msg.").appendTo(row1);
                var propertyName = $('<input/>',{style:"width: 220px",class:"node-input-rule-property-name",type:"text"}).appendTo(row1);


                var finalspan = $('<span/>',{style:"float: right; margin-right: 10px;"}).appendTo(row1);
                var deleteButton = $('<a/>',{href:"#",class:"editor-button", style:"margin-left: 5px;"}).appendTo(finalspan);
                $('<i/>',{class:"fa fa-remove"}).appendTo(deleteButton);


                $('<div/>',{style:"display: inline-block;text-align:right; width:150px;padding-right: 10px; box-sizing: border-box;"}).text(to).appendTo(row2);
                var propertyValue = $('<input/>',{style:"width: 220px",class:"node-input-rule-property-value",type:"text"}).appendTo(row2);

                var row3_1 = $('<div/>').appendTo(row3);
                $('<div/>',{style:"display: inline-block;text-align:right; width:150px;padding-right: 10px; box-sizing: border-box;"}).text(search).appendTo(row3_1);
                var fromValue = $('<input/>',{style:"width: 220px",class:"node-input-rule-property-search-value",type:"text"}).appendTo(row3_1);

                var row3_2 = $('<div/>',{style:"margin-top:8px;"}).appendTo(row3);
                $('<div/>',{style:"display: inline-block;text-align:right; width:150px;padding-right: 10px; box-sizing: border-box;"}).text(replace).appendTo(row3_2);
                var toValue = $('<input/>',{style:"width: 220px",class:"node-input-rule-property-replace-value",type:"text"}).appendTo(row3_2);

                var row3_3 = $('<div/>',{style:"margin-top:8px;"}).appendTo(row3);
                var id = "node-input-rule-property-regex-"+Math.floor(Math.random()*10000);
                var useRegExp = $('<input/>',{id:id,class:"node-input-rule-property-re",type:"checkbox", style:"margin-left: 150px; margin-right: 10px; display: inline-block; width: auto; vertical-align: top;"}).appendTo(row3_3);
                $('<label/>',{for:id,style:"width: auto;"}).text(regex).appendTo(row3_3);


                selectField.change(function() {
                    var type = $(this).val();

                    if (type == "set") {
                        row2.show();
                        row3.hide();
                    } else if (type == "change") {
                        row2.hide();
                        row3.show();
                    } else if (type == "delete") {
                        row2.hide();
                        row3.hide();
                    }
                });
                deleteButton.click(function() {
                    container.css({"background":"#fee"});
                    container.fadeOut(300, function() {
                        $(this).remove();
                    });
                });

                selectField.find("option").filter(function() {return $(this).val() == rule.t;}).attr('selected',true);
                propertyName.val(rule.p);
                propertyValue.val(rule.to);
                fromValue.val(rule.from);
                toValue.val(rule.to);
                useRegExp.prop('checked', rule.re);
                selectField.change();

                $("#node-input-rule-container").append(container);
            }
            $("#node-input-add-rule").click(function() {
                generateRule({t:"replace",p:"payload"});
            });

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

                if (rule.t === "set") {
                    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++) {
                generateRule(this.rules[i]);
            }

            function changeDialogResize() {
                var rows = $("#dialog-form>div:not(.node-input-rule-container-row)");
                var height = $("#dialog-form").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-div").css("height",height+"px");
            };
            $( "#dialog" ).on("dialogresize", changeDialogResize);
            $( "#dialog" ).one("dialogopen", function(ev) {
                var size = $( "#dialog" ).dialog('option','sizeCache-change');
                if (size) {
                    $("#dialog").dialog('option','width',size.width);
                    $("#dialog").dialog('option','height',size.height);
                    changeDialogResize();
                }
            });
            $( "#dialog" ).one("dialogclose", function(ev,ui) {
                $( "#dialog" ).off("dialogresize",changeDialogResize);
            });
        },
        oneditsave: function() {
            var rules = $("#node-input-rule-container").children();
            var ruleset;
            var node = this;
            node.rules= [];
            rules.each(function(i) {
                var rule = $(this);
                var type = rule.find(".node-input-rule-type option:selected").val();
                var r = {
                    t:type,
                    p:rule.find(".node-input-rule-property-name").val()
                };
                if (type === "set") {
                    r.to = rule.find(".node-input-rule-property-value").val();
                } else if (type === "change") {
                    r.from = rule.find(".node-input-rule-property-search-value").val();
                    r.to = rule.find(".node-input-rule-property-replace-value").val();
                    r.re = rule.find(".node-input-rule-property-re").prop('checked');
                }
                node.rules.push(r);
            });
        }
    });
</script>