/
graph.ts
146 lines (129 loc) · 3.67 KB
/
graph.ts
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export type Module = {
readonly specifier: string;
readonly version: number;
readonly deps?: ReadonlyArray<DependencyDescriptor>;
readonly inlineCSS?: string;
readonly atomicCSS?: {
readonly tokens: ReadonlyArray<string>;
};
};
export type DependencyDescriptor = {
readonly specifier: string;
readonly dynamic?: boolean;
};
export class DependencyGraph {
#modules = new Map<string, Module>();
#globalVersion = Date.now();
constructor(modules?: Module[], globalVersion?: number) {
if (modules) {
modules.forEach((item) => {
if (typeof item.specifier === "string" && typeof item.version === "number") {
this.#modules.set(item.specifier, item);
}
});
}
if (globalVersion) {
this.#globalVersion = globalVersion;
}
}
get globalVersion(): number {
return this.#globalVersion;
}
get modules(): Module[] {
const modules: Module[] = [];
this.#modules.forEach((module) => modules.push(module));
return modules;
}
get(specifier: string): Module | undefined {
return this.#modules.get(specifier);
}
mark(specifier: string, props: Partial<Module>): Module {
const prev = this.#modules.get(specifier);
if (prev) {
Object.assign(prev, props);
return prev;
}
const mod: Module = {
specifier,
version: this.#globalVersion,
...props,
};
this.#modules.set(specifier, mod);
return mod;
}
unmark(specifier: string) {
this.#modules.delete(specifier);
}
// version++
update(specifier: string) {
this.#update(specifier);
}
#update(specifier: string, _set = new Set<string>()) {
const module = this.#modules.get(specifier);
if (module) {
// deno-lint-ignore ban-ts-comment
// @ts-ignore
module.version++;
_set.add(specifier);
this.#modules.forEach((module) => {
if (module.deps?.find((dep) => dep.specifier === specifier)) {
if (!_set.has(module.specifier)) {
this.#update(module.specifier, _set);
}
}
});
}
}
lookup(specifier: string, callback: (specifier: string) => void | false) {
this.#lookup(specifier, callback);
}
#lookup(specifier: string, callback: (specifier: string) => void | false, _set = new Set<string>()) {
_set.add(specifier);
for (const module of this.#modules.values()) {
if (module.deps?.find((dep) => dep.specifier === specifier)) {
if (!_set.has(module.specifier) && callback(module.specifier) !== false) {
this.#lookup(module.specifier, callback, _set);
}
}
}
}
shallowWalk(specifier: string, callback: (mod: Module) => void) {
this.#shallowWalk(specifier, callback);
}
#shallowWalk(
specifier: string,
callback: (mod: Module) => void,
_set = new Set<string>(),
) {
if (this.#modules.has(specifier)) {
const mod = this.#modules.get(specifier)!;
callback(mod);
_set.add(specifier);
mod.deps?.forEach((dep) => {
if (!_set.has(dep.specifier)) {
this.#shallowWalk(dep.specifier, callback, _set);
}
});
}
}
walk(specifier: string, callback: (mod: Module, importer?: Module) => void) {
this.#walk(specifier, callback);
}
#walk(
specifier: string,
callback: (mod: Module, importer?: Module) => void,
importer?: Module,
_path: string[] = [],
) {
if (this.#modules.has(specifier)) {
const mod = this.#modules.get(specifier)!;
callback(mod, importer);
_path.push(specifier);
mod.deps?.forEach((dep) => {
if (!_path.includes(dep.specifier)) {
this.#walk(dep.specifier, callback, mod, [..._path]);
}
});
}
}
}