feat: add humanJoin helper function

src/i18n/de.js

@@ -695,6 +695,12 @@ export default {
     size: 'Dateigröße',
   },
 
+  humanJoin: {
+    default: ', ',
+    and: ' und ',
+    or: ' oder ',
+  },
+
   rrule: {
     rrule: 'Wiederholungsregel',
 

src/i18n/en.js

@@ -687,7 +687,12 @@ export default {
     size: 'File size',
   },
 
-  // Etc
+  humanJoin: {
+    default: ', ',
+    and: ', and ',
+    or: ', or ',
+  },
+
   rrule: {
     rrule: 'Repetition rule',
 

src/util.ts

@@ -337,3 +337,14 @@ export function useForeignSlotNames() {
       .map(([key]) => key)
   })
 }
+
+export function humanJoin(iterable: Iterable<string>, glue: string, lastGlue: string) {
+  const array = Array.from(iterable)
+
+  if (array.length === 0) return ''
+  if (array.length === 1) return array[0]
+  if (array.length === 2) return array.join(lastGlue)
+
+  const lastValue = array.pop() as string
+  return `${array.join(glue)}${lastGlue}${lastValue}`
+}