Support npm subflow modules

packages/node_modules/@node-red/registry/lib/subflow.js

@@ -0,0 +1,117 @@
+function getSubflowType(subflow) {
+    return "sf-"+subflow.id
+}
+
+function generateSubflowConfig(subflow) {
+
+    const subflowType = getSubflowType(subflow)
+    const label = subflow.name || subflowType;
+    const category = subflow.category || "function";
+    const color = subflow.color || "#C0DEED";
+    const inputCount = subflow.in?subflow.in.length:0;
+    const outputCount = subflow.out?subflow.out.length:0;
+    const icon = subflow.icon || "arrow-in.svg";
+
+    const defaults = {
+        name: {value: ""}
+    }
+
+    const credentials = {}
+
+    if (subflow.env) {
+        subflow.env.forEach(prop => {
+            var defaultValue;
+
+            switch(prop.type) {
+                case "cred": defaultValue = ""; break;
+                case "str": defaultValue = prop.value||""; break;
+                case "bool": defaultValue = (typeof prop.value === 'boolean')?prop.value:prop.value === "true" ; break;
+                case "num": defaultValue = (typeof prop.value === 'number')?prop.value:Number(prop.value); break;
+                default:
+                    defaultValue = {
+                        type: prop.type,
+                        value: prop.value||""
+                    }
+            }
+
+
+
+            defaults[prop.name] = {
+                value: defaultValue,
+                ui: prop.ui
+            }
+            if (prop.type === 'cred') {
+                defaults[prop.name].ui.type = "cred";
+                credentials[prop.name] = {type:"password"}
+            }
+        })
+    }
+    const defaultString = JSON.stringify(defaults);
+    const credentialsString = JSON.stringify(credentials);
+
+    return `<script type="text/javascript">
+    RED.nodes.registerType("${subflowType}",{
+        category: "${category}",
+        color: "${color}",
+        defaults: ${defaultString},
+        credentials: ${credentialsString},
+        inputs:${inputCount},
+        outputs:${outputCount},
+        icon: "${icon}",
+        paletteLabel: "${label}",
+        label: function() {
+            return this.name||"${label}";
+        },
+        labelStyle: function() {
+            return this.name?"node_label_italic":"";
+        },
+        oneditprepare: function() {
+            RED.subflow.buildEditForm('subflow', this);
+        },
+        oneditsave: function() {
+            var props = RED.subflow.exportSubflowInstanceEnv(this);
+            var i=0,l=props.length;
+            for (;i<l;i++) {
+                var prop = props[i];
+                if (this._def.defaults[prop.name].ui && this._def.defaults[prop.name].ui.type === "cred") {
+                    this[prop.name] = "";
+                    this.credentials[prop.name] = prop.value || "";
+                    this.credentials['has_' + prop.name] = (this.credentials[prop.name] !== "");
+                } else {
+                    switch(prop.type) {
+                        case "str": this[prop.name] = prop.value||""; break;
+                        case "bool": this[prop.name] = (typeof prop.value === 'boolean')?prop.value:prop.value === "true" ; break;
+                        case "num": this[prop.name] = (typeof prop.value === 'number')?prop.value:Number(prop.value); break;
+                        default:
+                            this[prop.name] = {
+                                type: prop.type,
+                                value: prop.value||""
+                            }
+                    }
+                }
+            }
+        }
+    });
+</script>
+<script type="text/x-red" data-template-name="${subflowType}">
+    <div class="form-row">
+        <label for="node-input-name" data-i18n="[append]editor:common.label.name"><i class="fa fa-tag"></i> </label>
+        <input type="text" id="node-input-name" data-i18n="[placeholder]editor:common.label.name">
+    </div>
+    <div id="subflow-input-ui"></div>
+</script>
+`
+}
+
+
+function register(id,subflow) {
+    return {
+        subflow: subflow,
+        type: getSubflowType(subflow),
+        config: generateSubflowConfig(subflow)
+    }
+}
+
+module.exports = {
+    register: register
+}