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app/javascript/controllers/local_time_controller.js

@@ -2,7 +2,7 @@ import { Controller } from "@hotwired/stimulus"
 import { differenceInDays } from "helpers/date_helpers"
 
 export default class extends Controller {
-  static targets = [ "time", "date", "datetime", "shortdate", "ago", "indays", "daysago" ]
+  static targets = [ "time", "date", "datetime", "shortdate", "ago", "indays", "daysago", "daysuntil" ]
 
   #timer
 
@@ -14,6 +14,7 @@ export default class extends Controller {
     this.agoFormatter = new AgoFormatter()
     this.daysagoFormatter = new DaysAgoFormatter()
     this.indaysFormatter = new InDaysFormatter()
+    this.daysuntilFormatter = new DaysUntilFormatter()
   }
 
   connect() {
@@ -60,6 +61,10 @@ export default class extends Controller {
     this.#formatTime(this.daysagoFormatter, target)
   }
 
+  daysuntilTargetConnected(target) {
+    this.#formatTime(this.daysuntilFormatter, target)
+  }
+
   #refreshRelativeTimes() {
     this.agoTargets.forEach(target => {
       this.#formatTime(this.agoFormatter, target)
@@ -121,6 +126,13 @@ class InDaysFormatter {
   }
 }
 
+class DaysUntilFormatter {
+  format(date) {
+    const days = differenceInDays(new Date(), date)
+    return styleableValue(days)
+  }
+}
+
 function styleableValue(value) {
   return `<span class="local-time-value">${value}</span>`
 }