Day 03 pa 01

03/index.ts

@@ -0,0 +1,137 @@
+const fs = require('fs').promises;
+
+const input: string = (await fs.readFile('./input.txt')).toString()
+const testInput = `
+467..114..
+...*......
+..35..633.
+......#...
+617*......
+.....+.58.
+..592.....
+......755.
+...$.*....
+.664.598..
+`
+
+console.log("Solution first part: " + partOne(input))
+// console.log("Solution second part: " + partTwo(input))
+
+
+function partOne(input: string): string {
+	const raw = input.split("\n")
+	let lines = []
+	
+	for(const line of raw) {
+		lines.push(line.split(''))
+	}
+	
+	let validNumbers = []
+	let currentNumber = ''
+	let currentStart = 0
+	for (const [lineI, line] of lines.entries()) {
+		for(const [i, char] of line.entries()) {
+			if(!Number.isNaN(parseInt(char))) {
+				if (currentNumber == '') { currentStart = i}
+				currentNumber += char
+			} else {
+				if (currentNumber !== '') { 
+					if(checkHasAdjacents(lines, lineI, currentNumber.length, currentStart, false)) {
+						validNumbers.push(parseInt(currentNumber))
+					} else {
+						console.log(`${lineI+1}: ${currentNumber}`)
+					}
+				}
+				currentNumber = ''
+			}
+		}
+		if (currentNumber !== '') { 
+			if(checkHasAdjacents(lines, lineI, currentNumber.length, currentStart, false)) {
+				validNumbers.push(parseInt(currentNumber))
+			}
+		}
+		currentNumber = ''
+	}
+	let result = validNumbers.reduce((acc, item) => { return acc + item })
+	return `${result}`
+}
+
+function grabChar(lines: Array<Array<string>>, lineIndex: number, start: number): string | false {
+	if (lines[lineIndex] && lines[lineIndex][start]) {
+		return lines[lineIndex][start]
+	} else {
+		return false
+	}
+} 
+
+function grabCharRange(lines: Array<Array<string>>, lineIndex: number, start: number, end: number): Array<string> {
+	let chars: Array<string> = []
+	let i = start
+	if (!lines[lineIndex]) {
+		return []
+	}
+	while(i <= end) {
+		if (lines[lineIndex][i]) {
+			chars.push(lines[lineIndex][i])
+		}
+		i++
+	}
+	return chars
+} 
+
+function checkHasAdjacents(lines: Array<Array<string>>, lineIndex: number, length: number, start: number, log: boolean): boolean {
+	let hasAdjacents = false
+	let notSymbols = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '.']
+	
+	// Left
+	let leftChar = grabChar(lines, lineIndex, start -1)
+	if (leftChar && notSymbols.indexOf(leftChar) === -1) {
+		hasAdjacents = true
+	}
+	
+	// Left Diagonal
+	let leftTopChar = grabChar(lines, lineIndex - 1, start - 1)
+	if (leftTopChar && notSymbols.indexOf(leftTopChar) === -1) {
+		hasAdjacents = true
+	}
+	let leftBottomChar = grabChar(lines, lineIndex + 1, start - 1)
+	if (leftBottomChar && notSymbols.indexOf(leftBottomChar) === -1) {
+		hasAdjacents = true
+	}
+	// Right
+	let rightChar = grabChar(lines, lineIndex, start + length)
+	if (rightChar && notSymbols.indexOf(rightChar) === -1) {
+		hasAdjacents = true
+	}
+	// Right Diagonal
+	let rightTopChar = grabChar(lines, lineIndex - 1, start + length) 
+	if (rightTopChar && notSymbols.indexOf(rightTopChar) === -1) {
+		hasAdjacents = true
+	}
+	let rightBottomChar = grabChar(lines, lineIndex + 1, start + length)
+	if (rightBottomChar && notSymbols.indexOf(rightBottomChar) === -1) {
+		hasAdjacents = true
+	}
+	
+	// Top
+	let topChars = grabCharRange(lines, lineIndex - 1, start, start + length -1)
+	for (const char of topChars) {
+		if (notSymbols.indexOf(char) === -1) {
+			hasAdjacents = true
+		}
+	}
+	
+	
+	// Bottom
+	let bottomChars = grabCharRange(lines, lineIndex + 1, start, start + length - 1)
+	for (const char of bottomChars) {
+		if (notSymbols.indexOf(char) === -1) {
+			hasAdjacents = true
+		}
+	}
+	
+	return hasAdjacents
+}
+
+function partTwo(input: string): string {
+}