feat(cli): add commands/search

cli/commands/search/index.ts

@@ -0,0 +1,61 @@
+import path from 'node:path'
+import fs from 'node:fs'
+
+import { Command, Option } from 'clipanion'
+import * as typanion from 'typanion'
+import chalk from 'chalk'
+
+import { template } from '../../services/Template.js'
+import { Challenge } from '../../services/Challenge.js'
+
+export class SearchCommand extends Command {
+  static paths = [['search']]
+
+  static usage = {
+    description: 'Search challenges in the programming language specified.'
+  }
+
+  public solved = Option.Boolean('--solved', false, {
+    description:
+      'Challenges which have already been solved (at least with one solution).'
+  })
+
+  public programmingLanguage = Option.String('--language', {
+    description: 'The programming language used to solve the challenge.',
+    required: true,
+    validator: typanion.isString()
+  })
+
+  async execute(): Promise<number> {
+    try {
+      await template.verifySupportedProgrammingLanguage(
+        this.programmingLanguage
+      )
+      const challenges = await Challenge.getChallenges()
+      const challengesResult: Challenge[] = []
+      for (const challenge of challenges) {
+        const solutionsPath = path.join(challenge.path, 'solutions')
+        const solutions = await fs.promises.readdir(solutionsPath)
+        if (
+          (!this.solved && !solutions.includes(this.programmingLanguage)) ||
+          (this.solved && solutions.includes(this.programmingLanguage))
+        ) {
+          challengesResult.push(challenge)
+        }
+      }
+      const message = this.solved
+        ? 'Challenges already solved'
+        : 'Challenges not yet solved'
+      console.log(`${message} in ${chalk.bold(this.programmingLanguage)}:`)
+      for (const challenge of challengesResult) {
+        console.log(`  - ${challenge.name}`)
+      }
+      return 0
+    } catch (error) {
+      if (error instanceof Error) {
+        console.error(`${chalk.bold.red('Error:')} ${error.message}`)
+      }
+      return 1
+    }
+  }
+}