feat: display talent rank with roman numerals in character sheet

src/handlebars/handlebars-helpers.ts

@@ -13,4 +13,64 @@ const helpers = {
     },
 
     isEmpty: (input: Array<unknown> | null | undefined): boolean => (input?.length ?? 0) === 0,
+
+    toRomanNumerals,
 };
+
+function toRomanNumerals(number: number): string {
+    return toRomanNumeralsRecurse(number, numerals) ?? "";
+}
+
+function toRomanNumeralsRecurse(number: number, numerals: number[]): string | undefined {
+    if (number === 0) {
+        return undefined;
+    }
+    const currentNumeral = numerals[0];
+    if (currentNumeral === undefined) {
+        return undefined;
+    }
+
+    const quotient = number / currentNumeral;
+    const remainder = number % currentNumeral;
+    const numberAsNumerals = numeralLookup[currentNumeral]?.repeat(quotient);
+    if (numberAsNumerals === undefined) {
+        return undefined;
+    }
+    const [, ...remainingNumerals] = numerals;
+    return numberAsNumerals + (toRomanNumeralsRecurse(remainder, remainingNumerals) ?? "");
+}
+
+const numeralLookup: Record<number, string> = {
+    1: "I",
+    2: "II",
+    3: "III",
+    4: "IV",
+    5: "V",
+    6: "VI",
+    7: "VII",
+    8: "VIII",
+    9: "IX",
+    10: "X",
+    20: "XX",
+    30: "XXX",
+    40: "XL",
+    50: "L",
+    60: "LX",
+    70: "LXX",
+    80: "LXXX",
+    90: "XC",
+    100: "C",
+    200: "CC",
+    300: "CCC",
+    400: "CD",
+    500: "D",
+    600: "DC",
+    700: "DCC",
+    800: "DCCC",
+    900: "CM",
+    1000: "M",
+};
+
+const numerals = [
+    1000, 900, 800, 700, 600, 500, 400, 300, 200, 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1,
+];

templates/sheets/actor/tabs/character-abilities.hbs

@@ -18,7 +18,7 @@ SPDX-License-Identifier: MIT
         {{#each itemsByType.talent as |itemData id|}}
         {{#> systems/ds4/templates/sheets/actor/components/item-list-entry.hbs itemData=itemData}}
         {{!-- rank --}}
-        <div>{{itemData.data.rank.total}}</div>
+        <div>{{toRomanNumerals itemData.data.rank.total}}</div>
         {{/systems/ds4/templates/sheets/actor/components/item-list-entry.hbs}}
         {{/each}}
     </ol>