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nodered2mcu.js
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/*
* Copyright (c) 2022-2023 Moddable Tech, Inc.
*
* This file is part of the Moddable SDK Tools.
*
* The Moddable SDK Tools is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Moddable SDK Tools is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the Moddable SDK Tools. If not, see <http://www.gnu.org/licenses/>.
*
*/
import { FILE, TOOL } from "tool";
import Transform from "transform"
// Regular Expression by Mathias Bynens
// https://github.com/mathiasbynens/mothereff.in/blob/master/js-properties/eff.js
// https://github.com/mathiasbynens/mothereff.in/blob/master/LICENSE-MIT.txt
const regexIdentifierNameES6 = 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// from Node-RED runtime/lib/flows/util.js
const EnvVarPropertyRE_old = /^\$\((\S+)\)$/;
const EnvVarPropertyRE = /^\${(\S+)}$/;
// nodes that don't generate errors
const NoErrorNodes = [
"catch",
"change",
"complete",
"debug",
"inject",
"link in",
"link out",
"switch",
"status",
"trigger",
"rpi-neopixels"
];
// nodes that don't call done
const NoDoneNodes = [
"switch", // does call node.error()
];
// nodes that don't report status
const NoStatusNodes = [
"catch",
"change",
"complete",
"inject",
"link call",
"link in",
"link out",
"range",
"split",
"status",
"switch"
];
export default class extends TOOL {
constructor(argv) {
super(argv);
this.sourcePath = null;
this.outputDirectory = null;
let argc = argv.length;
for (let argi = 1; argi < argc; argi++) {
let option = argv[argi], name, path;
switch (option) {
case "-e":
argi++;
if (argi >= argc)
throw new Error("-e: no extract path");
this.extract = argv[argi];
break;
case "-o":
argi++;
if (argi >= argc)
throw new Error("-o: no path!");
name = argv[argi];
if (this.outputDirectory)
throw new Error("-o '" + name + "': too many output paths!");
path = this.resolveDirectoryPath(name);
if (!path)
throw new Error("-o '" + name + "': path not found!");
this.outputDirectory = path;
break;
default:
name = argv[argi];
if (this.sourcePath)
throw new Error("'" + name + "': too many files!");
path = this.resolveFilePath(name);
if (!path)
throw new Error("'" + name + "': file not found!");
this.sourcePath = path;
break;
}
}
if (!this.sourcePath)
throw new Error("no input file!");
}
run() {
const source = this.readFileString(this.sourcePath);
let flows = JSON.parse(source);
let credentials;
if (this.sourcePath.toLowerCase().endsWith(".json")) {
const path = this.sourcePath.slice(0, -5) + "_cred_mcu.json";
if (this.resolveFilePath(path))
credentials = JSON.parse(this.readFileString(path)).credentials;
}
if (this.extract) {
const data = this.extractOne(flows, this.extract, credentials);
const parts = {
directory: this.outputDirectory,
name: this.extract.substring(0, this.extract.lastIndexOf(".")),
extension: this.extract.substring(this.extract.lastIndexOf("."))
};
const output = new FILE(this.joinPath(parts), "wb");
output.writeBuffer(data);
output.close();
return;
}
flows = this.transformFlows(flows, credentials);
const parts = this.splitPath(this.sourcePath);
parts.extension = ".js";
if (this.outputDirectory)
parts.directory = this.outputDirectory;
const outputPath = this.joinPath(parts);
const output = new FILE(outputPath, "wb");
output.writeString(flows);
output.close();
}
transformFlows(flows, credentials) {
const imports = new Map([["nodered", ""]]); // ensure that globalThis.RED is available
// must be an array with at least one element
if (!Array.isArray(flows))
throw new Error("JSON input is not an array");
if (!flows.length)
throw new Error("no nodes");
// if no flows, create one. useful for running flow snippets (e.g. https://cookbook.nodered.org/).
if (!flows.some(config => ("tab" === config.type) && config.z)) {
const z = flows[0].z;
if (flows.every(config => z === config.z)) {
flows.unshift({
type: "tab",
name: "auto-generated by nodered2mcu",
id: z
});
}
}
// add global configuration flow to start of list
flows.unshift({
type: "tab",
id: "__config",
name: "global config"
});
// set z for each node in global configuration flow
flows.forEach(config => {
if (("tab" !== config.type) && !config.z)
config.z = "__config";
});
// map from node ID to config and delete disabled and Comment nodes
const nodes = new Map;
for (let i = 0; i < flows.length; i++) {
const config = flows[i];
if ("tab" === config.type)
continue;
if(("comment" === config.type)&&(config.name?.startsWith("moddable_import"))&&(config.info?.startsWith("{"))){
const arr = JSON.parse(config.info);
for(let key in arr) {
imports.set(key, arr[key]);
}
}
if (config.d || ("comment" === config.type)) {
flows.splice(i, 1);
i -= 1;
}
else
nodes.set(config.id, config);
}
// route around junction nodes
while (true) {
let changed;
nodes.forEach(config => {
config.wires?.forEach(output => {
for (let i = 0; i < output.length; i++) {
const wire = output[i];
const target = nodes.get(wire);
if ("junction" !== target?.type)
continue;
output.splice(i, 1, ...target.wires[0]);
i += -1 + target.wires[0].length;
changed = true;
}
});
});
if (!changed)
break;
}
// remove junction nodes
for (let i = 0; i < flows.length; i++) {
const config = flows[i];
if ("junction" === config.type) {
nodes.delete(config.id);
flows.splice(i, 1);
i -= 1;
}
}
// remove group nodes with empty environments
// (unobservable except for NR_GROUP_NAME & NR_GROUP_ID environment variables)
for (let i = 0; i < flows.length; i++) {
const config = flows[i];
if (("group" === config.type) && !config.env?.length) {
const g = config.g;
const id = config.id;
nodes.delete(config.id);
flows.splice(i, 1);
i -= 1;
for (let j = 0; j < flows.length; j++) {
const config = flows[j];
if (config.g === id) { // this node referenced deleted group
if (g)
config.g = g; // reference enclosing group
else
delete config.g; // no longer in a group
}
}
}
}
// check for ui_base (required for all other ui_* nodes)
nodes.forEach(config => {
if ("ui_base" === config.type)
nodes.ui_base = config;
});
// replace ${Environment} variables
flows.forEach((config, i) => this.applyEnv(flows, i, flows[i], flows));
// process each node
let parts = [];
flows.forEach(config => {
if (("tab" !== config.type) || config.disabled)
return;
parts.push(`\tflow = flows.next().value; // ${config.id}`);
parts.push(``);
parts.push(`\tnodes = flow.nodes();`);
const z = config.id;
flows.forEach(config => {
if (config.z !== z)
return;
if (credentials?.[config.id])
config.credentials = credentials[config.id];
const name = config.name;
let {type, id, /* name, */ ...c} = {...config};
delete c.x;
delete c.y;
delete c.z;
delete c.outputLabels;
delete c._mcu;
delete c.moddable_manifest;
try {
// remove wires that connect to missing nodes
for (let i = 0, length = config.wires?.length ?? 0; i < length; i++)
config.wires[i] = config.wires[i].filter(wire => nodes.has(wire));
// enabled status nodes for this node
const statuses = flows.filter(config => {
if ((config.z !== z) || (config.type !== "status"))
return;
return !config.scope || config.scope.includes(id);
}).map(config => config.id);
// enabled completion nodes for this node
const dones = flows.filter(config => {
if ((config.z !== z) || (config.type !== "complete"))
return;
return config.scope.includes(id);
}).map(config => config.id);
// enabled catch nodes for this node
let errors = flows.filter(config => {
if ((config.z !== z) || (config.type !== "catch"))
return;
return (!config.scope && !config.uncaught) || config.scope?.includes(id);
});
if (0 === errors.length)
errors = flows.filter(config => (config.z === z) && config.uncaught && (config.type === "catch"));
errors = errors.map(config => config.id);
this.prepareNode(type, c, dones.length ? dones : undefined, errors.length ? errors : undefined, statuses.length ? statuses : undefined, nodes, imports);
if (c.type) {
config.type = c.type;
delete c.type;
}
parts.push(`\tnode = nodes.next().value; // ${config.type} - ${id}`);
let configuration = ["{"];
for (const name in c) {
const value = c[name];
if (("string" === typeof value) && value.startsWith("function ("))
configuration.push(`\t\t${name}: ${value},`);
else
if (("string" === typeof value) && value.startsWith("[[JSON]]"))
configuration.push(`\t\t${name}: ${value.slice(8)},`);
else
if (value instanceof Uint8Array)
configuration.push(`\t\t${name}: Uint8Array.of(${value.toString()}),`);
else
configuration.push(`\t\t${name}: ${JSON.stringify(value)},`);
}
configuration.push("\t}");
configuration = configuration.join("\n");
parts.push(`\tnode.onStart(${configuration});`) ;
parts.push(``)
}
catch (e) {
trace(`Error translating node ID "${id}", type "${type}", name "${name}": ${e}\n`);
throw e;
}
});
});
const nodeParts = parts.splice(0);
// header (after imports complete)
parts.push(`// auto-generated by nodered2mcu on ${Date()}`);
parts.push(``);
imports.forEach((specifier, name) => {
if (specifier)
parts.push(`import ${name} from "${specifier}"`);
else
parts.push(`import "${name}"`);
});
parts.push(``);
parts.push(`function build(flows, createFlow, createNode) {`);
parts.push(`\tlet flow, node, nodes;`);
flows.forEach(config => {
if (("tab" !== config.type) || config.disabled)
return;
const createFlow = `\tflow = createFlow("${config.id}", ${JSON.stringify(config.label ?? "")}`;
if (!config.env?.length)
parts.push(`${createFlow});`);
else {
parts.push(`${createFlow}, {`);
parts.push(...this.prepareEnv(config.env));
parts.push(`\t});`);
}
const z = config.id;
flows.forEach(config => {
if (config.z !== z)
return;
parts.push(`\tcreateNode("${config.type}", "${config.id}", ${JSON.stringify(config.name ?? "")}, flow);`)
});
});
parts.push(``)
parts.push(`\tflows = flows.values();`);
parts = parts.concat(nodeParts);
parts.push(`}`)
parts.push(``)
parts.push(`export default Object.freeze({`);
parts.push(`\tbuild,`);
parts.push(`}, true);`);
return parts.join("\n");
}
prepareNode(type, config, dones, errors, statuses, nodes, imports) {
switch (type) {
case "status": {
delete config.scope;
} break;
case "catch": {
delete config.uncaught;
delete config.scope;
} break;
case "complete": {
delete config.uncaught;
delete config.scope;
} break;
case "group": {
const env = this.prepareEnv(config.env);
config.env = `[[JSON]]{\n` + env.join("\n") + "\n}"
delete config.nodes;
delete config.style;
delete config.w;
delete config.h;
} break;
case "debug": {
if ("jsonata" === config.targetType)
throw new Error("jsonata unimplemented");
const getter = [];
getter.push(`function (msg) {`);
if ("true" === config.complete)
getter.push(`\t\t\treturn msg;`);
else {
let name = config.complete;
if ("false" === name)
name = "payload";
getter.push(`\t\t\treturn msg${this.prepareProp(name)};`);
}
getter.push(`\t\t}`);
config.getter = getter.join("\n");
if (config.tostatus) {
const statusType = config.statusType ?? "auto";
if ("auto" === statusType)
config.statusVal = config.getter;
else if ("msg" === statusType) {
getter.length = 1;
getter.push(`\t\t\treturn msg.${config.statusVal};`);
getter.push(`\t\t}`);
config.statusVal = getter.join("\n");
}
else
throw new Error(`unimplemented statusType: ${config.statusType}`);
}
config.active = !!config.active;
} break;
case "Blockly":
config.type = "function";
delete config.workspaceXml;
delete config.timeout;
delete config.blocklyConfig;
delete config.backpackContents;
// fall through
case "function": {
const params = "node, context, flow, global, libs, env"
let libs = "";
if (config.libs?.length) {
libs = [];
for (let i = 0; i < config.libs.length; i++) {
const item = config.libs[i];
libs[i] = item.var;
config.libs[i] = item.module;
}
libs = `const [${libs.join(", ")}] = libs;\n`
}
else
delete config.libs;
if (config.func) {
config.func = `function (msg, ${params}) {\n${libs}${config.func}\n}`;
if (dones && !/node\.done\s*\(\s*\)/.test(config.func)) // from 10-function.js.. first order approximiation of what it does
config.doDone = true;
}
else
delete config.func;
if (config.initialize)
config.initialize = `function (${params}) {\n${libs}${config.initialize}\n}`;
else
delete config.initialize;
delete config.finalize;
delete config.outputs;
delete config.noerr;
} break;
case "inject": {
if (config.chrontab)
throw new Error("chrontab unimplemented");
const trigger = [];
trigger.push(`function () {`);
trigger.push(`\t\t\tconst msg = {};`);
if (!config.props) { // convert older style config
config.props = [{
p: "payload",
payload: config.payload,
payloadType: config.payloadType
}];
if (undefined !== config.topic) {
config.props.push({
p: "topic",
v: config.topic,
vt: "str"
});
}
}
config.props.forEach(property => {
const name = property.p;
const type = ("payload" === name) ? config.payloadType : property.vt;
let value = property.v;
if ("payload" === name)
value = config.payload;
else if ("topic" === name)
value = config.topic;
value = this.resolveValue(type, value);
this.createPropPath(name, trigger, "\t\t\t");
trigger.push(`\t\t\tmsg${this.prepareProp(name)} = ${value};`);
});
trigger.push(`\t\t\tthis.send(msg);`);
if (dones)
trigger.push(`\t\t\tthis.done(msg);`);
trigger.push(`\t\t}`);
config.trigger = trigger.join("\n");
let delay;
if (config.once)
delay = config.once ? parseFloat(config.onceDelay) * 1000 : 0;
const repeat = config.repeat ? parseFloat(config.repeat) * 1000 : 0;
if ((undefined !== delay) || (0 !== repeat)) {
const initialize = [];
initialize.push(`function () {`);
imports.set("Timer", "timer");
if (repeat)
initialize.push(`\t\t\tTimer.set(() => this.trigger(), ${delay ?? repeat}, ${repeat});`);
else
initialize.push(`\t\t\tTimer.set(() => this.trigger(), ${delay});`);
initialize.push(`\t\t}`);
config.initialize = initialize.join("\n");
}
delete config.props;
delete config.topic;
delete config.repeat;
delete config.crontab;
delete config.once;
delete config.onceDelay;
delete config.payload;
delete config.payloadType;
} break;
case "change": {
const change = [];
if (dones)
change.push(`function (msg, done) {`);
else
change.push(`function (msg) {`);
let createdTemp = false;
config.rules.forEach(rule => {
let doDelete;
if (("delete" === rule.t) || ("move" === rule.t)) {
if ("msg" === rule.pt) {
// moving a property to itself is no-op
if (("move" === rule.t) && (rule.p === rule.to) && ("msg" === rule.tot))
return;
doDelete = `\t\t\tdelete msg${this.prepareProp(rule.p)}`;
}
else if ("flow" === rule.pt)
doDelete = `\t\t\tthis.flow.delete(${this.makeStorageArgs(rule.p)});`;
else if ("global" === rule.pt)
doDelete = `\t\t\tglobalContext.delete(${this.makeStorageArgs(rule.p)});`;
else
throw new Error(`unexpected delete type: ${rule.pt}`);
}
if ("set" === rule.t) {
let value = this.resolveValue(rule.tot, rule.to);
if (rule.dc) {
value = `structuredClone(${value})`
imports.set("structuredClone", "structuredClone");
}
if ("msg" === rule.pt) {
this.createPropPath(rule.p, change, "\t\t\t");
change.push(`\t\t\tmsg${this.prepareProp(rule.p)} = ${value};`);
}
else if ("flow" === rule.pt)
change.push(`\t\t\tthis.flow.set(${this.makeStorageArgs(rule.p, value)});`);
else if ("global" === rule.pt)
change.push(`\t\t\tglobalContext.set(${this.makeStorageArgs(rule.p, value)});`);
else
throw new Error(`unexpected set type: ${rule.pt}`);
}
else if ("change" === rule.t) {
const from = this.resolveValue(rule.fromt, rule.from);
const to = this.resolveValue(rule.tot, rule.to);
if ("msg" === rule.pt) {
this.createPropPath(rule.p, change, "\t\t\t");
change.push(`\t\t\tmsg${this.prepareProp(rule.p)} = this.change(msg${this.prepareProp(rule.p)}, ${from}, ${JSON.stringify(rule.fromt)}, ${to});`);
}
else if (("flow" === rule.pt) || ("global" === rule.pt)) {
const which = ("flow" === rule.pt) ? "flow" : "globalContext";
const value = `this.change(this.${which}.get(${this.makeStorageArgs(rule.p)}), ${from}, ${JSON.stringify(rule.fromt)}, ${to})`;
change.push(`\t\t\tthis.${which}.set(${this.makeStorageArgs(rule.p, value)});`);
}
else
throw new Error(`unexpected change type: ${rule.pt}`);
}
else if ("move" === rule.t) {
// GET, DELETE, SET
const value = this.resolveValue(rule.pt, rule.p);
if (createdTemp)
change.push(`\t\t\ttemp = ${value};`);
else {
change.push(`\t\t\tlet temp = ${value};`);
createdTemp = true;
}
change.push(doDelete);
if ("msg" === rule.tot) {
this.createPropPath(rule.to, change, "\t\t\t");
change.push(`\t\t\tmsg${this.prepareProp(rule.to)} = temp;`);
}
else if ("flow" === rule.tot)
change.push(`\t\t\tthis.flow.set(${this.makeStorageArgs(rule.to)}, temp);`);
else if ("global" === rule.tot)
change.push(`\t\t\tglobalContext.set(${this.makeStorageArgs(rule.to)}, temp);`);
else
throw new Error(`unexpected move type: ${rule.pt}`);
}
if ("delete" === rule.t)
change.push(doDelete);
});
if (dones)
change.push(`\t\t\tdone();`);
change.push(`\t\t\treturn msg;`);
change.push(`\t\t}`);
config.onMessage = change.join("\n");
delete config.rules;
delete config.action;
delete config.property;
delete config.from;
delete config.to;
delete config.reg;
} break;
case "split": {
if (("splt" in config) && !config.spltType) // historic: https://cookbook.nodered.org/basic/split-text
config.spltType = "str";
if (!config.arraySpltType) { // // historic: https://cookbook.nodered.org/basic/split-text
config.arraySplt = 1;
config.arraySpltType = "len";
}
config.arraySplt = parseInt(config.arraySplt);
config.splt = (config.splt || "\\n").replace(/\\n/g,"\n").replace(/\\r/g,"\r").replace(/\\t/g,"\t").replace(/\\e/g,"\e").replace(/\\f/g,"\f").replace(/\\0/g,"\0"); // adapted from 17-split.js
switch (config.spltType) {
case "bin":
if (config.splt.startsWith("["))
config.splt = Uint8Array.from(JSON.parse(config.splt));
else
config.splt = new Uint8Array(ArrayBuffer.fromString(config.splt));
break;
case "str":
break;
case "len":
config.splt = parseInt(config.splt);
break;
default:
throw new Error("unrecognized spltType: " + config.spltType);
}
} break;
case "join": {
if ("reduce" === config.mode)
throw new Error("reduce unimplemented");
config.mode = config.mode||"auto";
config.property = config.property||"payload";
config.propertyType = config.propertyType||"msg";
if (config.propertyType === 'full') {
config.property = "payload";
}
config.key = config.key||"topic";
config.count = Number(config.count || 0);
config.joinerType = config.joinerType || "str";
if (config.joinerType === "str")
config.joiner = (config.joiner ?? "").replace(/\\n/g,"\n").replace(/\\r/g,"\r").replace(/\\t/g,"\t").replace(/\\e/g,"\e").replace(/\\f/g,"\f").replace(/\\0/g,"\0"); // adapted from 17-split.js
config.getter = `function (msg) {return msg${this.prepareProp(config.property)};}`;
config.setter = `function (msg, value) {msg${this.prepareProp(config.property)} = value;}`;
} break;
case "trigger": {
config.op1 = config.op1 || "1";
config.op2 = config.op2 || "0";
config.op1type = config.op1type || "str";
config.op2type = config.op2type || "str";
if ((config.op1type === "num") && (!isNaN(config.op1))) { config.op1 = Number(config.op1); }
if ((config.op2type === "num") && (!isNaN(config.op2))) { config.op2 = Number(config.op2); }
if (config.op1type === 'val') {
if (config.op1 === 'true' || config.op1 === 'false') {
config.op1type = 'bool'
} else if (config.op1 === 'null') {
config.op1type = 'null';
config.op1 = null;
} else {
config.op1type = 'str';
}
}
if (config.op2type === 'val') {
if (config.op2 === 'true' || config.op2 === 'false') {
config.op2type = 'bool'
} else if (config.op2 === 'null') {
config.op2type = 'null';
config.op2 = null;
} else {
config.op2type = 'str';
}
}
config.op1Templated = (config.op1type === 'str' && config.op1.indexOf("{{") != -1);
config.op2Templated = (config.op2type === 'str' && config.op2.indexOf("{{") != -1);
if (config.op1type && ("pay" !== config.op1type) && ("payl" !== config.op1type) && (undefined !== config.op1))
config.__op1 = `function () {return ${this.resolveValue(config.op1type, config.op1)}}`;
if (config.op2type && ("pay" !== config.op2type) && ("payl" !== config.op2type) && (undefined !== config.op2))
config.__op2 = `function () {return ${this.resolveValue(config.op2type, config.op2)}}`;
} break;
case "sort": {
if (config.as_num)
config.as_num = true;
else
delete config.as_num;
let target_prop = config.target || "payload";
let target_is_prop = (config.targetType === 'msg');
let key_is_exp = target_is_prop ? (config.msgKeyType === "jsonata") : (config.seqKeyType === "jsonata");
let key_prop = config.seqKey || "payload";
let key_exp = target_is_prop ? config.msgKey : config.seqKey;
config.dir = (config.order === "descending") ? -1 : +1;
config.target_is_prop = target_is_prop;
config.key_is_exp = key_is_exp;
if (key_is_exp) {
config.getter = `function (msg) {return msg${this.prepareProp(key_exp)};}`;
config.setter = `function (msg, value) {msg${this.prepareProp(key_exp)} = value;}`;
}
else {
const prop = target_is_prop ? target_prop : key_prop;
config.getter = `function (msg) {return msg${this.prepareProp(prop)};}`;
config.setter = `function (msg, value) {msg${this.prepareProp(prop)} = value;}`;
}
delete config.order;
} break;
case "range": {
const maxin = parseFloat(config.maxin);
const maxout = parseFloat(config.maxout);
const minin = parseFloat(config.minin);
const minout = parseFloat(config.minout);
const scale = (maxout - minout) / (maxin - minin);
const action = config.action;
const property = config.property ?? "payload";
const round = config.round;
const range = [];
if (dones)
range.push(`function (msg, done) {`);
else
range.push(`function (msg) {`);
range.push(`\t\t\tlet value = msg${this.prepareProp(property)};`);
if ("clamp" === action) {
range.push(`\t\t\tif (value < ${minin})`);
range.push(`\t\t\t\tvalue = ${minin};`);
range.push(`\t\t\tif (value > ${maxin})`);
range.push(`\t\t\t\tvalue = ${maxin};`);
}
else if ("roll" === action) {
const divisor = maxin - minin;
range.push(`\t\t\tvalue = ((value - ${minin}) % ${divisor} + ${divisor}) % ${divisor} + ${minin};`);
}
range.push(`\t\t\tvalue = ((value - ${minin}) * ${scale}) + ${minout};`);
if (round)
range.push(`\t\t\tmsg${this.prepareProp(property)} = Math.round(value);`);
else
range.push(`\t\t\tmsg${this.prepareProp(property)} = value;`);
if (dones)
range.push(`\t\t\tdone();`);
range.push(`\t\t\treturn msg;`);
range.push(`\t\t}`);
config.onMessage = range.join("\n");
delete config.maxin;
delete config.maxout;
delete config.minin;
delete config.minout;
delete config.action;
delete config.property;
delete config.round;
} break;
case "switch": {
const value = this.resolveValue(config.propertyType, config.property);
const checkAll = "true" === config.checkall;
const outputCount = config.wires?.length ?? 0;
const hasElse = checkAll && config.rules.find(config => "else" === config.t);
const usesPrevious = config.rules.find(config => ("prev" === config.v2t) || ("prev" == config.vt));
const doSwitch = [];
doSwitch.push(`function (msg) {`);
doSwitch.push(`\t\t\tlet value = ${value};`);
doSwitch.push(`\t\t\tconst result = [${"null, ".repeat(outputCount)}];`);
if (usesPrevious) {
doSwitch.push(`\t\t\tconst previous = this.previous;`);
doSwitch.push(`\t\t\tthis.previous = value;`);
}
if (hasElse)
doSwitch.push(`\t\t\tlet first = true;`);
config.rules.map((config, index) => {
let test;
if ("istype" === config.t) {
switch (config.v) {
case "string":
case "number":
case "boolean":
case "object":
case "undefined":
case "null":
test = `"${config.v}" === typeof value`;
break;
case "array":
test = `Array.isArray(value)`;
break;
case "json":
doSwitch.push(`\t\t\ttry {`);
doSwitch.push(`\t\t\t\tJSON.parse(value);`);
doSwitch.push(`\t\t\t\tvalue = true;`);
doSwitch.push(`\t\t\t}`);
doSwitch.push(`\t\t\tcatch {`);
doSwitch.push(`\t\t\t\tvalue = false;`);
doSwitch.push(`\t\t\t}`);
test = `value`;
break;
case "buffer":
test = `value instanceof Uint8Array`;
break;
default:
throw new Error(`unimplemented istype: ${config.v}`);
}
}
else {
const v = this.resolveSwitch(config.vt, config.v);
const v2 = this.resolveSwitch(config.v2t, config.v2);
switch (config.t) {
case "btwn":
test = `(${v} <= value) && (value <= ${v2})`;
break;
case "eq":
test = `value == ${v}`;
break;
case "neq":
test = `value != ${v}`;
break;
case "lt":
test = `value < ${v}`;
break;
case "lte":
test = `value <= ${v}`;
break;
case "gt":
test = `value > ${v}`;
break;
case "gte":
test = `value >= ${v}`;
break;
case "true":
test = `true === value`;
break;
case "false":
test = `false === value`;
break;
case "null":
test = `((null === value) || (undefined === value))`;
break;
case "nnull":
test = `!((null === value) || (undefined === value))`;
break;
case "empty":
test = `this.empty(value)`;
break;
case "nempty":
test = `!this.empty(value)`;
break;
case "hask":
test = `("object" === typeof value) && (${v} in value)`;
break;
case "else":
if (hasElse) {
doSwitch.push(`\t\t\tif (first) {`);
doSwitch.push(`\t\t\t\tresult[${index}] = msg;`);
}
else {
doSwitch.push(`\t\t\t{`);
doSwitch.push(`\t\t\tresult[${index}] = msg;`);
}
break;
default:
throw new Error(`unimplemented rule: ${config.t}`);
}
}
if (test) {
doSwitch.push(`\t\t\tif (${test}) {`);
doSwitch.push(`\t\t\t\tresult[${index}] = msg;`);
if (!checkAll)
doSwitch.push(`\t\t\t\treturn result;`); //@@
if (hasElse)
doSwitch.push(`\t\t\t\tfirst = false;`);
}
doSwitch.push(`\t\t\t}`);
});
doSwitch.push(`\t\t\treturn result;`);
doSwitch.push(`\t\t}`);
config[config.repair ? "compare" : "onMessage"] = doSwitch.join("\n");
delete config.property;
delete config.propertyType;
delete config.rules;
delete config.checkall;
delete config.repair;
delete config.outputs;
} break;
case "link call":
case "link out":
config.links = config.links?.filter(link => nodes.has(link)); // remove broken links
if ("link call" === type) {
config.timeout = parseFloat(config.timeout || 30) * 1000; // logic from 60_link.js
if (isNaN(config.timeout))
config.timeout = 30_000;
}
else if ("return" === config.mode)
delete config.links;
break;
case "link in":
delete config.links;