From c8a7a6dcd4b44add9732635418c568a6d846d085 Mon Sep 17 00:00:00 2001
From: Divlo <contact@divlo.fr>
Date: Thu, 5 Jan 2023 18:29:07 +0100
Subject: [PATCH] feat(cli): add `commands/search`

---
 cli/cli.ts                   |  2 ++
 cli/commands/search/index.ts | 61 ++++++++++++++++++++++++++++++++++++
 cli/services/Challenge.ts    | 12 +++++--
 3 files changed, 73 insertions(+), 2 deletions(-)
 create mode 100644 cli/commands/search/index.ts

diff --git a/cli/cli.ts b/cli/cli.ts
index 07a146e..a75343a 100644
--- a/cli/cli.ts
+++ b/cli/cli.ts
@@ -4,6 +4,7 @@ import { GenerateChallengeCommand } from './commands/generate/challenge.js'
 import { GenerateSolutionCommand } from './commands/generate/solution.js'
 import { RunSolutionCommand } from './commands/run/solution.js'
 import { RunTestCommand } from './commands/run/test.js'
+import { SearchCommand } from './commands/search/index.js'
 
 export const cli = new Cli({
   binaryLabel: 'programming-challenges',
@@ -16,3 +17,4 @@ cli.register(GenerateChallengeCommand)
 cli.register(GenerateSolutionCommand)
 cli.register(RunTestCommand)
 cli.register(RunSolutionCommand)
+cli.register(SearchCommand)
diff --git a/cli/commands/search/index.ts b/cli/commands/search/index.ts
new file mode 100644
index 0000000..fd8bb09
--- /dev/null
+++ b/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
+    }
+  }
+}
diff --git a/cli/services/Challenge.ts b/cli/services/Challenge.ts
index 6a8b3c0..e3ec19e 100644
--- a/cli/services/Challenge.ts
+++ b/cli/services/Challenge.ts
@@ -15,6 +15,7 @@ export interface GenerateChallengeOptions extends ChallengeOptions {
 }
 
 export class Challenge implements ChallengeOptions {
+  public static BASE_URL = new URL('../../challenges/', import.meta.url)
   public name: string
   public path: string
 
@@ -22,11 +23,18 @@ export class Challenge implements ChallengeOptions {
     const { name } = options
     this.name = name
     this.path = fileURLToPath(
-      new URL(`../../challenges/${name}`, import.meta.url)
+      new URL(`./${name}`, Challenge.BASE_URL)
     )
   }
 
-  static async generate(options: GenerateChallengeOptions): Promise<Challenge> {
+  public static async getChallenges(): Promise<Challenge[]> {
+    const challengeNames = await fs.promises.readdir( Challenge.BASE_URL)
+    return challengeNames.map((challengeName) => {
+      return new Challenge({ name: challengeName })
+    })
+  }
+
+  public static async generate(options: GenerateChallengeOptions): Promise<Challenge> {
     const { name, githubUser } = options
     const challenge = new Challenge({ name })
     if (await isExistingPath(challenge.path)) {