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utils.ts

@@ -0,0 +1,62 @@
+import { exists } from "https://deno.land/[email protected]/fs/exists.ts";
+import { initParser } from "https://deno.land/x/[email protected]/deno-dom-wasm-noinit.ts";
+
+export function sleep(time: number): Promise<undefined> {
+    return new Promise((r) => {
+        setTimeout(() => {
+            r(undefined);
+        }, time);
+    });
+}
+
+export async function sure_dir(f = "./test") {
+    if (!await exists(f)) {
+        await Deno.mkdir(f, { "recursive": true });
+    }
+}
+
+export enum PromiseStatus {
+    Pending,
+    Fulfilled,
+    Rejected,
+}
+
+export type PromiseState<T> = {
+    status: PromiseStatus;
+    value: Awaited<T> | undefined;
+    reason: unknown;
+};
+
+export function promiseState<T>(p: Promise<T>): Promise<PromiseState<T>> {
+    const pe = { status: PromiseStatus.Pending };
+    return new Promise((resolve) => {
+        Promise.race([p, pe]).then((v) => {
+            v === pe ? resolve(pe as PromiseState<T>) : resolve(
+                {
+                    status: PromiseStatus.Fulfilled,
+                    value: v,
+                } as PromiseState<T>,
+            );
+        }).catch((e) => {
+            resolve(
+                { status: PromiseStatus.Rejected, reason: e } as PromiseState<
+                    T
+                >,
+            );
+        });
+    });
+}
+
+let inited_parser = false;
+
+export async function initDOMParser() {
+    if (!inited_parser) {
+        await initParser();
+        inited_parser = true;
+    }
+}
+
+export function parse_bool(s: string) {
+    const l = s.toLowerCase();
+    return l === "true" || l === "yes";
+}