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webc.js
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webc.js
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import fs from "fs";
import fastglob from "fast-glob";
import isGlob from "is-glob";
import path from "path";
import { Path } from "./src/path.js";
import { AstSerializer } from "./src/ast.js";
import { ModuleScript } from "./src/moduleScript.cjs";
import { AstCache } from "./src/astCache.js";
import { ModuleResolution } from "./src/moduleResolution.js";
import { ComponentManager } from "./src/componentManager.js";
const localAstCache = new AstCache();
class WebC {
constructor(options = {}) {
let { file, input } = options;
this.customTransforms = {};
this.customHelpers = {};
this.customScopedHelpers = {};
this.globalComponents = {};
this.astOptions = {};
this.bundlerMode = false;
this.ignores = options.ignores || [];
if(input || input === "") {
this.rawInput = input;
}
if(file) {
this.setInputPath(file);
}
}
setInputPath(file) {
file = Path.normalizePath(file);
this.filePath = file;
this.astOptions.filePath = file;
}
setContent(input, filePath) {
this.rawInput = input;
if(filePath) {
this.astOptions.filePath = filePath;
}
}
setGlobalComponentManager(manager) {
this.globalComponentManager = manager;
}
getRenderingMode(content) {
if(!content.startsWith("<!doctype") && !content.startsWith("<!DOCTYPE") && !content.startsWith("<html")) {
return "component";
}
return "page";
}
_getRawContent() {
if(this.rawInput || this.rawInput === "") {
return this.rawInput;
} else if(this.filePath) {
if(!this._cachedContent) {
this._cachedContent = fs.readFileSync(this.filePath, {
encoding: "utf8"
});
}
return this._cachedContent;
} else {
throw new Error("Missing a setInput or setInputPath method call to set the input.");
}
}
getContent() {
let content = this._getRawContent();
let mode = this.getRenderingMode(content.trimStart());
// prepend for no-quirks mode on components or implicit page rendering modes (starts with <html>)
if(mode === "component" || !content.startsWith("<!doctype ") && !content.startsWith("<!DOCTYPE")) {
content = `<!doctype html>${content}`;
}
return {
content,
mode,
};
}
static async getASTFromString(string) {
let wc = new WebC({
input: string
});
let { content } = wc.getContent();
return wc.getAST(content);
}
// @deprecated for getFromFilePath
static async getASTFromFilePath(filePath) {
let wc = new WebC({
file: filePath
});
let { content } = wc.getContent();
return wc.getAST(content);
}
static async getFromFilePath(filePath) {
let wc = new WebC({
file: filePath
});
let { content, mode } = wc.getContent();
return {
content,
ast: await wc.getAST(content),
mode,
};
}
getAST(content) {
if(!content) {
throw new Error("WebC.getAST() expects a content argument.");
}
return localAstCache.get(content);
}
setTransform(key, callback) {
this.customTransforms[key] = callback;
}
setHelper(key, callback, isScoped = false) {
if(isScoped) {
this.customScopedHelpers[key] = callback;
} else {
this.customHelpers[key] = callback;
}
}
setAlias(key, folder) {
if(!this.aliases) {
this.aliases = {};
}
this.aliases[key] = folder;
}
async _defineComponentsObject(obj = {}) {
for(let name in obj) {
let file = obj[name];
if(this.globalComponents[name]) {
throw new Error(`Global component name collision on "${name}" between: ${this.globalComponents[name]} and ${file}`)
}
this.globalComponents[name] = file;
}
}
static findGlob(glob, ignores = []) {
return fastglob.sync(glob, {
ignore: ignores,
caseSensitiveMatch: false,
dot: false,
});
}
static getComponentsMap(globOrObject, ignores) {
let rawFiles = globOrObject;
// Passing in a single string is assumed to be a glob
if(typeof rawFiles === "string") {
rawFiles = WebC.findGlob(globOrObject, ignores);
}
if(Array.isArray(rawFiles)) {
let moduleResolver = new ModuleResolution();
let resolvedFiles = new Set();
for(let file of rawFiles) {
// Resolve `npm:` aliases
let hasValidAlias = moduleResolver.hasValidAlias(file);
if(hasValidAlias) {
file = moduleResolver.resolveAliases(file);
}
// Multiple glob searches
if(isGlob(file)) {
let globResults = WebC.findGlob(file, ignores);
for(let globFile of globResults) {
resolvedFiles.add(globFile);
}
} else {
resolvedFiles.add(file);
}
}
let obj = {};
for(let file of resolvedFiles) {
let {name} = path.parse(file);
if(obj[name]) {
throw new Error(`Global component name collision on "${name}" between: ${obj[name]} and ${file}`)
}
obj[name] = file;
}
return obj;
}
return globOrObject;
}
defineComponents(globOrObject) {
this._defineComponentsObject(WebC.getComponentsMap(globOrObject, this.ignores));
}
setUidFunction(fn) {
this.uidFn = fn;
}
async setup(options = {}) {
let { content, mode } = this.getContent();
let rawAst = this.getAST(content);
let ast = new AstSerializer(this.astOptions);
ast.setComponentManager(this.globalComponentManager);
ast.setBundlerMode(this.bundlerMode);
ast.setMode(mode);
ast.setContent(content);
ast.setData(options.data);
if(this.aliases && Object.keys(this.aliases).length) {
ast.setAliases(this.aliases);
}
if(this.uidFn) {
ast.setUidFunction(this.uidFn);
}
for(let name in this.customTransforms) {
ast.setTransform(name, this.customTransforms[name]);
}
for(let name in this.customHelpers) {
ast.setHelper(name, this.customHelpers[name], false);
}
for(let name in this.customScopedHelpers) {
ast.setHelper(name, this.customScopedHelpers[name], true);
}
await ast.setComponentsByFilePath(this.globalComponents);
await ast.setComponentsByFilePath(options.components);
return {
ast: rawAst,
serializer: ast,
};
}
getComponents(setup) {
let { ast, serializer } = setup;
let obj = serializer.getComponentList(ast);
return Object.keys(obj);
}
setBundlerMode(mode) {
this.bundlerMode = !!mode;
}
async stream(options = {}) {
let { ast, serializer } = await this.setup(options);
serializer.streams.start();
serializer.compile(ast, options.slots).catch(() => {
// Node requires this to avoid unhandled rejection errors (yes, even with `finally`)
serializer.streams.end();
}).finally(() => {
serializer.streams.end();
});
return serializer.streams.get();
}
async compile(options = {}) {
let { ast, serializer } = await this.setup(options);
return serializer.compile(ast, options.slots);
}
}
export { WebC, ModuleScript, ComponentManager };