feat: upgrade ndate command

JonDotsoy · Jul 28, 2023 · e83848e · e83848e
1 parent 80d4562
commit e83848e
Showing 1 changed file with 92 additions and 45 deletions.
diff --git a/handler.ts b/handler.ts
@@ -1,70 +1,117 @@
-import { 
-  toDateStyle,
-  toTimeStyle,
-  dateParse,
-toHourCycle,
- } from "./lib/common.ts";
+import {
+ dateParse,
+ toDateStyle,
+ toHourCycle,
+ toTimeStyle,
+} from "./lib/common.ts";
 import { renderDateTemplate } from "./lib/renderDateTemplate.ts";
 import { makeFlags } from "./makeFlags.ts";
 
-export const handler = async function*(args: string[]): AsyncGenerator<Uint8Array> {
- let {
- hourCycle, dateStyle, timeStyle, insertFinalNewLine, local, timeZone, date, outputAsEpoch, outputAsEpochMS, outputAsJSON, outputAsUTC, stdinReadable, showHelp, template, transformOptions, optionsLabels,
- } = makeFlags(args);
-
- if(showHelp) {
- const items = Object.keys(transformOptions)
- .map(item => {
- const label = optionsLabels[item]?.label;
- return label ? `[${item} ${label}]` : `[${item}]`;
- });
+const makeHelpDialog = function* (
+ transformOptions: Record<
+ string,
+ (nextArgument: () => string | undefined) => void
+ >,
+ optionsLabels: Record<
+ string,
+ {
+ label?: string | undefined;
+ } | undefined
+ >,
+) {
+ const items = Object.keys(transformOptions)
+ .map((item) => {
+ const label = optionsLabels[item]?.label;
+ return label ? `[${item} ${label}]` : `[${item}]`;
+ });
 
-  const textUsage = `Usage: ndate`;
+ const textUsage = `Usage: ndate`;
 
- const lines: string[] = [];
- let currentLine: string | undefined;
- for(const item of items) {
- if(!currentLine) {
- currentLine = lines.length ? `${' '.repeat(textUsage.length)}` : `${textUsage}`;
- }
+ const lines: string[] = [];
+ let currentLine: string | undefined;
+ for (const item of items) {
+ if (!currentLine) {
+ currentLine = lines.length
+ ? `${" ".repeat(textUsage.length)}`
+ : `${textUsage}`;
+ }
 
- currentLine = `${currentLine} ${item}`;
- if(currentLine.length > 80) {
- lines.push(currentLine);
- currentLine = undefined;
- }
+ currentLine = `${currentLine} ${item}`;
+ if (currentLine.length > 80) {
+ lines.push(currentLine);
+ currentLine = undefined;
  }
+ }
 
-  if(currentLine) lines.push(currentLine);
+ if (currentLine) lines.push(currentLine);
 
- for(const line of lines) {
- yield new TextEncoder().encode(line);
- yield new TextEncoder().encode('\n');
- }
+ for (const line of lines) {
+ yield new TextEncoder().encode(line);
+ yield new TextEncoder().encode("\n");
+ }
+};
 
+export const handler = async function* (
+ args: string[],
+): AsyncGenerator<Uint8Array> {
+ let {
+ hourCycle,
+ dateStyle,
+ timeStyle,
+ insertFinalNewLine,
+ local,
+ timeZone,
+ date,
+ outputAsEpoch,
+ outputAsEpochMS,
+ outputAsJSON,
+ outputAsUTC,
+ stdinReadable,
+ showHelp,
+ template,
+ transformOptions,
+ optionsLabels,
+ } = makeFlags(args);
+
+ if (showHelp) {
+ yield* makeHelpDialog(transformOptions, optionsLabels);
  return;
  }
 
- if(timeZone) Deno.env.set(`TZ`, timeZone);
- if(local) Deno.env.set(`LANG`, local);
+ if (timeZone) Deno.env.set(`TZ`, timeZone);
+ if (local) Deno.env.set(`LANG`, local);
 
- if(stdinReadable) {
+ if (stdinReadable) {
  const buff = new Uint8Array(256);
  await Deno.stdin.read(buff);
- const text = new TextDecoder().decode(buff.subarray(0, buff.findIndex(p => p === 0))).trim();
+ const text = new TextDecoder().decode(
+ buff.subarray(0, buff.findIndex((p) => p === 0)),
+ ).trim();
  date = dateParse(text);
  }
 
  const toOutput = () => {
- if(template) return renderDateTemplate(template, date, local, { dateStyle: toDateStyle(dateStyle), timeStyle: toTimeStyle(timeStyle), timeZone, hourCycle: toHourCycle(hourCycle) });
- if(outputAsEpochMS) return Math.floor(date.getTime()).toString();
- if(outputAsEpoch) return Math.floor(date.getTime() / 1000).toString();
- if(outputAsJSON) return date.toJSON();
- if(outputAsUTC) return date.toUTCString();
- return date.toLocaleString(local, { dateStyle: toDateStyle(dateStyle), timeStyle: toTimeStyle(timeStyle), timeZone, hourCycle: toHourCycle(hourCycle) });
+ if (template) {
+ return renderDateTemplate(template, date, local, {
+ dateStyle: toDateStyle(dateStyle),
+ timeStyle: toTimeStyle(timeStyle),
+ timeZone,
+ hourCycle: toHourCycle(hourCycle),
+ });
+ }
+ if (outputAsEpochMS) return Math.floor(date.getTime()).toString();
+ if (outputAsEpoch) return Math.floor(date.getTime() / 1000).toString();
+ if (outputAsJSON) return date.toJSON();
+ if (outputAsUTC) return date.toUTCString();
+ return date.toLocaleString(local, {
+ dateStyle: toDateStyle(dateStyle),
+ timeStyle: toTimeStyle(timeStyle),
+ timeZone,
+ hourCycle: toHourCycle(hourCycle),
+ });
  };
 
  yield new TextEncoder().encode(toOutput());
 
- if(insertFinalNewLine) yield new TextEncoder().encode(`\n`);
+ if (insertFinalNewLine) yield new TextEncoder().encode(`\n`);
 };