fix(dossier): improuve decimal field formatting

app/components/editable_champ/decimal_number_component/decimal_number_component.html.haml

@@ -1 +1 @@
-= @form.text_field(:value, input_opts(id: @champ.input_id, aria: { describedby: @champ.describedby_id }, required: @champ.required?, pattern: "-?[0-9]+([\.,][0-9]{1,3})?", inputmode: :decimal, data: { controller: 'format decimal-number-input', format: :decimal }))
+= @form.text_field(:value, input_opts(id: @champ.input_id, aria: { describedby: @champ.describedby_id }, required: @champ.required?, pattern: "-?[0-9]+([\.,][0-9]{1,3})?", inputmode: :decimal, data: { controller: 'format', format: :decimal }))

app/javascript/controllers/decimal_number_input_controller.ts

@@ -1,35 +0,0 @@
-import { ApplicationController } from './application_controller';
-
-export class DecimalNumberInputController extends ApplicationController {
-  connect() {
-    const value = this.inputElement.value;
-
-    if (value) {
-      this.formatValue(value);
-    }
-  }
-
-  formatValue(value: string) {
-    const number = parseFloat(value);
-
-    if (isNaN(number)) {
-      return;
-    }
-
-    this.inputElement.value = number.toLocaleString();
-    this.emitInputEvent(); // trigger format controller
-  }
-
-  private get inputElement(): HTMLInputElement {
-    return this.element as HTMLInputElement;
-  }
-
-  private emitInputEvent() {
-    const event = new InputEvent('input', {
-      bubbles: true,
-      cancelable: true
-    });
-
-    this.inputElement.dispatchEvent(event);
-  }
-}

app/javascript/controllers/format_controller.ts

@@ -7,25 +7,29 @@ export class FormatController extends ApplicationController {
       case 'list':
         this.on('change', (event) => {
           const target = event.target as HTMLInputElement;
-          target.value = this.formatList(target.value);
+          const value = this.formatList(target.value);
+          replaceValue(target, value);
         });
         break;
       case 'iban':
         this.on('input', (event) => {
           const target = event.target as HTMLInputElement;
-          target.value = this.formatIBAN(target.value);
+          const value = this.formatIBAN(target.value);
+          replaceValue(target, value);
         });
         break;
       case 'integer':
         this.on('input', (event) => {
           const target = event.target as HTMLInputElement;
-          target.value = this.formatInteger(target.value);
+          const value = this.formatInteger(target.value);
+          replaceValue(target, value);
         });
         break;
       case 'decimal':
         this.on('input', (event) => {
           const target = event.target as HTMLInputElement;
-          target.value = this.formatDecimal(target.value);
+          const value = this.formatDecimal(target.value);
+          replaceValue(target, value);
         });
         break;
     }
@@ -48,12 +52,34 @@ export class FormatController extends ApplicationController {
   }
 
   private formatDecimal(value: string) {
-    // Le séparateur de décimales est toujours après le séparateur de milliers (un point ou une virgule).
-    // S'il n'y a qu'un seul séparateur, on considère que c'est celui des décimales.
-    // S'il n'y en a pas, ça n'a pas d'effet.
-    const decimalSeparator =
-      value.lastIndexOf(',') > value.lastIndexOf('.') ? ',' : '.';
-
-    return value.replace(new RegExp(`[^-?\\d${decimalSeparator}]`, 'g'), '');
+    const decimalSeparator = getDecimalSeparator(value);
+    const number =
+      decimalSeparator == ','
+        ? value.replace(/\./g, '').replace(/,/g, '.')
+        : value.replace(/,/g, '');
+    return number.replace(new RegExp(`[^-?\\d.]`, 'g'), '');
   }
 }
+
+function replaceValue(target: HTMLInputElement, value: string) {
+  const delta = target.value.length - value.length;
+  const start = target.selectionStart;
+  const end = target.selectionStart;
+  const dir = target.selectionDirection;
+  target.value = value;
+  target.selectionStart = start ? start - delta : 0;
+  target.selectionEnd = end ? end - delta : 0;
+  target.selectionDirection = dir;
+}
+
+function getDecimalSeparator(value: string) {
+  if (value.indexOf('.') != -1 && value.indexOf(',') != -1) {
+    if (value.lastIndexOf('.') < value.lastIndexOf(',')) {
+      return ',';
+    }
+    return '.';
+  } else if (value.indexOf(',') != -1) {
+    return ',';
+  }
+  return (1.1).toLocaleString().indexOf('.') != -1 ? '.' : ',';
+}

spec/system/users/brouillon_spec.rb

@@ -195,15 +195,20 @@ describe 'The user' do
       champ_value_for('nombre décimal') == '123456.78'
     }
 
-    fill_in('nombre décimal', with: '1,234.56')
+    champ_past_value_for('nombre décimal', '1,234.56')
     wait_until {
       champ_value_for('nombre décimal') == '1234.56'
     }
 
-    fill_in('nombre décimal', with: '-1,234.56')
+    champ_past_value_for('nombre décimal', '-1,234.56')
     wait_until {
       champ_value_for('nombre décimal') == '-1234.56'
     }
+
+    champ_past_value_for('nombre décimal', '1.234,56')
+    wait_until {
+      champ_value_for('nombre décimal') == '1234.56'
+    }
   end
 
   scenario 'extends dossier experation date more than one time, ', js: true, retry: 3 do
@@ -584,6 +589,18 @@ describe 'The user' do
     champ_for(libelle).value
   end
 
+  def champ_id_for(libelle)
+    champ_for(libelle).input_id
+  end
+
+  def champ_past_value_for(libelle, value)
+    execute_script("{
+      let target = document.querySelector('##{champ_id_for(libelle)}');
+      target.value = \"#{value}\";
+      target.dispatchEvent(new CustomEvent('input', { bubbles: true }));
+    }")
+  end
+
   def champ_for(libelle)
     champs = user_dossier.reload.champs_public
     champs.find { |c| c.libelle == libelle }