[IMP] hr_holidays: limit accrual plans and levels day selection based on selected month

The day selection for accrual plans carryover date and accrual levels yearly date is now limited to 29 or 30 depending on which month is selected.

Task: 6191776

Author: SebVde

addons/hr_holidays/static/src/components/day_selection/day_selection.js

@@ -0,0 +1,36 @@
+import { selectionField, SelectionField } from "@web/views/fields/selection/selection_field";
+import { registry } from "@web/core/registry";
+
+export class DaySelectionField extends SelectionField {
+    static props = {
+        ...SelectionField.props,
+        month: String,
+    };
+
+    get options() {
+        let allOptions = super.options;
+        const monthValue = this.props.record.data[this.props.month];
+        const maxDay = new Date(2020, monthValue, 0).getDate();
+        allOptions = allOptions.filter((option) => option[0] <= maxDay);
+        return allOptions;
+    }
+}
+
+export const daySelectionField = {
+    ...selectionField,
+    component: DaySelectionField,
+    extractProps({ attrs }) {
+        return {
+            ...selectionField.extractProps(...arguments),
+            month: attrs.month,
+        };
+    },
+    fieldDependencies: ({ attrs }) => [
+        {
+            name: attrs.month,
+            type: "selection",
+        },
+    ],
+};
+
+registry.category("fields").add("day_selection", daySelectionField);

addons/hr_holidays/views/hr_leave_accrual_views.xml

@@ -46,7 +46,7 @@
                                 </span>
                                 <span name="yearly" invisible="frequency != 'yearly'">
                                     on the
-                                    <field nolabel="1" name="yearly_day" class="o_field_accrual" required="frequency == 'yearly'" placeholder="select a day"/>
+                                    <field nolabel="1" name="yearly_day" class="o_field_accrual" widget="day_selection" month="yearly_month" required="frequency == 'yearly'" placeholder="select a day"/>
                                     of
                                     <field nolabel="1" name="yearly_month" class="o_field_accrual" required="frequency == 'yearly'" placeholder="select a month"/>
                                 </span>
@@ -195,7 +195,7 @@
                                                options="{'links': {'other': 'carryover_custom_date'}, 'observe': 'carryover'}"/>
                                         <span id="carryover_custom_date">
                                             : the
-                                            <field name="carryover_day" placeholder="select a day"
+                                            <field name="carryover_day" widget="day_selection" month="carryover_month" style="width: 50px;" placeholder="select a day"
                                                    required="carryover_date == 'other'"/>
                                             of
                                             <field name="carryover_month" placeholder="select a month"