Umrechungen eingebaut

2026-04-06 11:04:11 +02:00
parent f3e613e98e
commit c820759d4e
6 changed files with 904 additions and 1 deletions
@@ -0,0 +1,118 @@
+(function (global) {
+    const ONES = ['', 'eins', 'zwei', 'drei', 'vier', 'fuenf', 'sechs', 'sieben', 'acht', 'neun'];
+    const ONES_COMPOUND = ['', 'ein', 'zwei', 'drei', 'vier', 'fuenf', 'sechs', 'sieben', 'acht', 'neun'];
+    const TEENS = ['zehn', 'elf', 'zwoelf', 'dreizehn', 'vierzehn', 'fuenfzehn', 'sechzehn', 'siebzehn', 'achtzehn', 'neunzehn'];
+    const TENS = ['', '', 'zwanzig', 'dreissig', 'vierzig', 'fuenfzig', 'sechzig', 'siebzig', 'achtzig', 'neunzig'];
+    const SCALES = [
+        { singular: '', plural: '', join: true },
+        { singular: 'Tausend', plural: 'Tausend', join: true },
+        { singular: 'Million', plural: 'Millionen', join: false },
+        { singular: 'Milliarde', plural: 'Milliarden', join: false },
+        { singular: 'Billion', plural: 'Billionen', join: false }
+    ];
+    const GROUP_NUMBER_FORMATTER = new Intl.NumberFormat('de-DE');
+
+    function chunkToWords(value) {
+        if (value === 0) {
+            return '';
+        }
+
+        if (value === 1) {
+            return 'eins';
+        }
+
+        let text = '';
+        const hundreds = Math.floor(value / 100);
+        const remainder = value % 100;
+
+        if (hundreds > 0) {
+            text += (hundreds === 1 ? 'ein' : ONES_COMPOUND[hundreds]) + 'hundert';
+        }
+
+        if (remainder > 0) {
+            if (remainder < 10) {
+                text += ONES[remainder];
+            } else if (remainder < 20) {
+                text += TEENS[remainder - 10];
+            } else {
+                const ones = remainder % 10;
+                const tens = Math.floor(remainder / 10);
+                if (ones > 0) {
+                    text += ONES_COMPOUND[ones] + 'und';
+                }
+                text += TENS[tens];
+            }
+        }
+
+        return text;
+    }
+
+    function integerToWords(value) {
+        if (!Number.isFinite(value)) {
+            return '';
+        }
+
+        if (value === 0) {
+            return 'null';
+        }
+
+        let number = Math.floor(Math.abs(value));
+        const groups = [];
+
+        while (number > 0) {
+            groups.push(number % 1000);
+            number = Math.floor(number / 1000);
+        }
+
+        const parts = [];
+
+        for (let i = groups.length - 1; i >= 0; i -= 1) {
+            const groupValue = groups[i];
+            if (groupValue === 0) {
+                continue;
+            }
+
+            const scale = SCALES[i] || { singular: '', plural: '', join: false };
+            if (i >= 2) {
+                const scaleLabel = groupValue === 1 ? scale.singular : scale.plural;
+                const prefix = groupValue === 1 ? 'eine' : GROUP_NUMBER_FORMATTER.format(groupValue);
+                parts.push(prefix + ' ' + scaleLabel);
+            } else if (i === 1) {
+                parts.push(GROUP_NUMBER_FORMATTER.format(groupValue) + ' ' + scale.singular);
+            } else {
+                parts.push(GROUP_NUMBER_FORMATTER.format(groupValue));
+            }
+        }
+
+        const result = parts.join('\n');
+        return value < 0 ? 'minus ' + result : result;
+    }
+
+    function numberToGermanText(value) {
+        if (!Number.isFinite(value)) {
+            return '';
+        }
+
+        const integerPart = Math.trunc(value);
+        const fractionalPart = Math.abs(value - integerPart);
+        const integerText = integerToWords(integerPart);
+
+        if (fractionalPart < 1e-10) {
+            return integerText;
+        }
+
+        const decimalDigits = fractionalPart
+            .toFixed(10)
+            .replace(/^0\./, '')
+            .replace(/0+$/, '')
+            .split('')
+            .map(function (digit) {
+                return ['null', 'eins', 'zwei', 'drei', 'vier', 'fuenf', 'sechs', 'sieben', 'acht', 'neun'][Number(digit)];
+            })
+            .join(' ');
+
+        return integerText + '\nKomma ' + decimalDigits;
+    }
+
+    global.numberToGermanText = numberToGermanText;
+})(window);