feat(2023-02): parse game draw data

2023/day-02/game.js

@@ -0,0 +1,28 @@
+const parseGame = (gameString) => {
+  const data = gameString.split(':')
+  const id = parseInt(
+    data[0].match(/\d+/)[0] // find the game number
+  )
+  const draws = data[1].split(';') // split the game into draws
+    .map((draw) => {
+      const result = ['red', 'green', 'blue']
+        .map((color) => { // extract count for each color
+          const reg = new RegExp(`\\d+(?= ${color})`)
+          console.debug(reg)
+          const val = draw.match(reg) || [0]
+          console.debug(`${color} ${val}`)
+          return parseInt(val).toString(16).padStart(2, '0') // convert to hex
+        })
+
+      return result.join('') // combine into a RGB hex color string
+    })
+
+  return {
+    id,
+    draws
+  }
+}
+
+module.exports = {
+  parseGame
+}

2023/day-02/game.test.js

@@ -0,0 +1,60 @@
+/* eslint-env mocha */
+const { expect } = require('chai')
+const { parseGame } = require('./game')
+
+describe('--- Day 2: Cube Conundrum ---', () => {
+  describe('Part 1', () => {
+    describe('parseGame', () => {
+      it('extracts a game string into a data object with RGB hex values for draws', () => {
+        const data = [
+          'Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green',
+          'Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue',
+          'Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red',
+          'Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red',
+          'Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green'
+        ]
+        const result = [
+          {
+            id: 1,
+            draws: [
+              '040003',
+              '010206',
+              '000200'
+            ]
+          }, {
+            id: 2,
+            draws: [
+              '000201',
+              '010304',
+              '000101'
+            ]
+          }, {
+            id: 3,
+            draws: [
+              '140806',
+              '040d05',
+              '010500'
+            ]
+          }, {
+            id: 4,
+            draws: [
+              '030106',
+              '060300',
+              '0e030f'
+            ]
+          }, {
+            id: 5,
+            draws: [
+              '060301',
+              '010202'
+            ]
+          }
+        ]
+
+        data.forEach((game, idx) => {
+          expect(parseGame(game)).to.deep.equal(result[idx])
+        })
+      })
+    })
+  })
+})