day 08 part 1 finished

2023/day08/index.js

@@ -0,0 +1,56 @@
+import fs from 'node:fs'
+
+function init(filename) {
+    const data = fs.readFileSync(filename, { encoding: 'utf-8' }, data => data)
+    const desertmap = new DesertMap(
+        data.split('\n\n')[0].split(''),
+        data.split('\n\n')[1]
+    )
+    desertmap.navigate()
+}
+
+
+class DesertMap {
+    instructions = []
+    map = ""
+    #iterator
+    #route = []
+    #way = null
+    constructor(instructions, map) {
+
+        this.instructions = instructions
+        this.map = map
+        this.#route = []
+        this.#iterator = 0
+        this.steps = 0
+        this.#way = null
+    }
+    setup() {
+        const matches = [...this.map.matchAll(/(\w+) = \((\w+), (\w+)\)/gm)]
+        matches.forEach(match => {
+            this.#route.push({ goal: match[1], L: match[2], R: match[3] })
+        })
+    }
+    run(towards) {
+        if (!this.steps) {
+            return this.#route.find(route => route.goal === 'AAA')[towards]
+        }
+        return this.#route.find(route => route.goal === this.#way)[towards]
+    }
+    navigate() {
+        this.setup()
+        //console.log(this.#route)
+
+        while (this.#iterator < this.instructions.length | true) {
+            this.#way = this.run(this.instructions[this.#iterator])
+            this.steps += 1
+            console.log(this.#iterator, this.#way, this.steps)
+            if (this.#way === 'ZZZ') { return false }
+            this.#iterator = this.instructions.length - this.#iterator === 1 ? 0 : this.#iterator + 1
+        }
+        console.log(this.steps)
+
+    }
+}
+
+init('input.txt')