From 91e4c0707cefcbd2c5ac2a828a65664680296f3c Mon Sep 17 00:00:00 2001
From: Corentin Thomasset <corentin.thomasset74@gmail.com>
Date: Fri, 11 Jun 2021 22:28:42 +0200
Subject: [PATCH] feat(tool): added roman numeral converter

---
 CHANGELOG.md                                |  1 +
 tools/converter/roman-numeral-converter.vue | 69 +++++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 tools/converter/roman-numeral-converter.vue

diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee2ea13a..c070e18e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added new tools
   - [Random port generator](https://it-tools.tech/random-port-generator)
   - [Unit converter](https://it-tools.tech/unit-converter)
+  - [Roman numeral converter](https://it-tools.tech/roman-numeral-converter)
 
 ### Removed
 - Removed markdown editor
diff --git a/tools/converter/roman-numeral-converter.vue b/tools/converter/roman-numeral-converter.vue
new file mode 100644
index 00000000..bf848717
--- /dev/null
+++ b/tools/converter/roman-numeral-converter.vue
@@ -0,0 +1,69 @@
+<template>
+  <ToolWrapper :config="$toolConfig">
+    <v-text-field
+      v-model.number="arabic"
+      label="Arabic form"
+      outlined
+      append-icon="mdi-content-copy"
+      @click:append="copy(arabic)"
+    />
+    <v-text-field
+      v-model="roman"
+      label="Roman number"
+      outlined
+      hide-details="auto"
+      append-icon="mdi-content-copy"
+      @click:append="copy(roman)"
+    />
+  </ToolWrapper>
+</template>
+
+<tool>
+title: 'Roman numeral converter'
+description: 'Lorem ipsum dolor sit amet, consectetur adipisicing elit. Delectus distinctio dolor dolorum eaque eligendi, facilis impedit laboriosam odit placeat.'
+icon: 'mdi-swap-horizontal'
+keywords: [ 'roman', 'arabic', 'converter' ]
+path: '/roman-numeral-converter'
+</tool>
+
+<script lang="ts">
+import {Component} from 'nuxt-property-decorator'
+import {CopyableMixin} from '@/mixins/copyable.mixin'
+import Tool from '@/components/Tool'
+
+function arabicToRoman(num:number) {
+  const lookup = {M: 1000, CM: 900, D: 500, CD: 400, C: 100, XC: 90, L: 50, XL: 40, X: 10, IX: 9, V: 5, IV: 4, I: 1}
+  let roman = ''
+  for (const i in lookup) {
+    while (num >= lookup[i]) {
+      roman += i
+      num -= lookup[i]
+    }
+  }
+  return roman
+}
+
+const romanToArabic = (s: string) => {
+  const map = {I: 1, V: 5, X: 10, L: 50, C: 100, D: 500, M: 1000}
+  return [...s].reduce((r, c, i, s) => map[s[i + 1]] > map[c] ? r - map[c] : r + map[c], 0)
+}
+
+@Component({
+  mixins: [CopyableMixin]
+})
+export default class RomanNumeralConverter extends Tool {
+  arabic = 256
+
+  get roman() {
+    return arabicToRoman(this.arabic)
+  }
+
+  set roman(value: string) {
+    this.arabic = romanToArabic(value)
+  }
+}
+</script>
+
+<style scoped>
+
+</style>