From 88d6e8b852bb12c5f0894c13b21eff73497253f2 Mon Sep 17 00:00:00 2001
From: wieerwill <robert.jeutter@gmx.de>
Date: Sat, 2 Dec 2023 11:29:49 +0100
Subject: [PATCH] solve Day01 in ts

---
 Day01/ts/solution.ts | 77 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 Day01/ts/solution.ts

diff --git a/Day01/ts/solution.ts b/Day01/ts/solution.ts
new file mode 100644
index 0000000..c2b6929
--- /dev/null
+++ b/Day01/ts/solution.ts
@@ -0,0 +1,77 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+function extractDigits(line: string): number[] {
+    const digitMap: { [key: string]: number } = {
+        zero: 0, one: 1, two: 2, three: 3, four: 4,
+        five: 5, six: 6, seven: 7, eight: 8, nine: 9
+    };
+
+    for (let i = 0; i <= 9; i++) {
+        digitMap[i.toString()] = i;
+    }
+
+    const digitsFound: number[] = [];
+    let i = 0;
+    while (i < line.length) {
+        let matched = false;
+        for (const [word, digit] of Object.entries(digitMap)) {
+            if (line.startsWith(word, i)) {
+                digitsFound.push(digit);
+                i += word.length - 1;
+                matched = true;
+                break;
+            }
+        }
+        i++;
+    }
+
+    return digitsFound;
+}
+
+function extractCalibrationValue(line: string): number {
+    const digits = extractDigits(line);
+    return digits.length > 0 ? parseInt(`${digits[0]}${digits[digits.length - 1]}`, 10) : 0;
+}
+
+function calculateTotalCalibrationValue(filePath: string): number {
+    try {
+        const lines = fs.readFileSync(filePath, 'utf-8').split('\n').filter(line => line);
+        return lines.reduce((sum, line) => sum + extractCalibrationValue(line), 0);
+    } catch (error) {
+        throw new Error(`Failed to process file: ${filePath}. Error: ${error}`);
+    }
+}
+
+function test(): void {
+    console.warn("Starting Tests");
+    const testLines = [
+        "two1nine",
+        "eightwothree",
+        "abcone2threexyz",
+        "xtwone3four",
+        "4nineeightseven2",
+        "zoneight234",
+        "7pqrstsixteen"
+    ];
+    const expectedResults = [29, 83, 13, 24, 42, 14, 76];
+
+    testLines.forEach((line, index) => {
+        const result = extractCalibrationValue(line);
+        console.assert(result === expectedResults[index], `Error in line '${line}': Expected ${expectedResults[index]}, got ${result}`);
+        console.log(`Line: '${line}', Calibration Value: ${result}`);
+    });
+    console.log("Finished Tests\n");
+}
+
+function main(): void {
+    try {
+        test();
+        const totalValue = calculateTotalCalibrationValue(path.join(__dirname, '../input.txt'));
+        console.log(`Total Calibration Value from input.txt: ${totalValue}`);
+    } catch (error) {
+        console.error(error);
+    }
+}
+
+main();