fix: skip Sunday in delivery date selection (client flow + backend validation)

- buildDefaultDatedAvailableSlots(): skip Sunday via getNextWorkday()
- ClientDeliveryPage.jsx: getAllowedDeliveryDateKeys() + fallback slots skip Sunday
- confirm-delivery-choice edge function: reject Sunday for delivery
- confirm_delivery_choice_by_token SQL RPC: extract(dow) = 0 → RAISE EXCEPTION
- Tests: Friday→Sat+Mon, Saturday→Mon+Tue (skip Sunday)
- Skill updated with pitfall

docs/sql/public-delivery-choice-rpc.sql

@@ -220,6 +220,11 @@ BEGIN
     RAISE EXCEPTION 'Selected slot is not available';
   END IF;
 
+  -- Business rule: never allow Sunday delivery (0 = Sunday in extract(dow))
+  IF extract(dow from p_delivery_date) = 0 THEN
+    RAISE EXCEPTION 'Delivery is not available on Sunday';
+  END IF;
+
   v_token_hash := encode(digest(p_token, 'sha256'), 'hex');
   v_slot_label := concat(p_delivery_date::text, ', ', trim(p_delivery_time));
 

src/pages/ClientDeliveryPage.jsx

@@ -42,9 +42,25 @@ const addDaysToDateKey = (dateKey, amount) => {
   return baseDate.toISOString().slice(0, 10);
 };
 
+const isSundayKey = (dateKey) => {
+  if (!dateKey) return true;
+  const d = new Date(`${dateKey}T12:00:00Z`);
+  return d.getUTCDay() === 0;
+};
+
+const getNextWorkdayKey = (dateKey) => {
+  let next = addDaysToDateKey(dateKey, 1);
+  while (isSundayKey(next)) {
+    next = addDaysToDateKey(next, 1);
+  }
+  return next;
+};
+
 const getAllowedDeliveryDateKeys = (referenceDate = new Date()) => {
   const todayKey = getBusinessTodayKey(referenceDate);
-  return new Set([addDaysToDateKey(todayKey, 1), addDaysToDateKey(todayKey, 2)].filter(Boolean));
+  const firstWorkday = getNextWorkdayKey(todayKey);
+  const secondWorkday = getNextWorkdayKey(firstWorkday);
+  return new Set([firstWorkday, secondWorkday].filter(Boolean));
 };
 
 const isAllowedDeliverySlotDate = (dateKey, referenceDate = new Date()) => {
@@ -65,15 +81,15 @@ export const groupSlotsFromInvitation = (invitation, referenceDate = new Date())
   const deliveryTime = invitation.deliveryTime;
 
   if (!rawSlots.length && !deliveryDate) {
-    // Fallback: generate default delivery slots (tomorrow + dayAfter, both halves)
+    // Fallback: generate default delivery slots (next 2 workdays, both halves, skip Sunday)
     const todayKey = getBusinessTodayKey(referenceDate);
-    const tomorrow = addDaysToDateKey(todayKey, 1);
+    const firstWorkday = getNextWorkdayKey(todayKey);
-    const dayAfter = addDaysToDateKey(todayKey, 2);
+    const secondWorkday = getNextWorkdayKey(firstWorkday);
     return [
-      { id: `slot-${tomorrow}-first`, date: tomorrow, time: "Первая половина дня" },
+      { id: `slot-${firstWorkday}-first`, date: firstWorkday, time: "Первая половина дня" },
-      { id: `slot-${tomorrow}-second`, date: tomorrow, time: "Вторая половина дня" },
+      { id: `slot-${firstWorkday}-second`, date: firstWorkday, time: "Вторая половина дня" },
-      { id: `slot-${dayAfter}-first`, date: dayAfter, time: "Первая половина дня" },
+      { id: `slot-${secondWorkday}-first`, date: secondWorkday, time: "Первая половина дня" },
-      { id: `slot-${dayAfter}-second`, date: dayAfter, time: "Вторая половина дня" },
+      { id: `slot-${secondWorkday}-second`, date: secondWorkday, time: "Вторая половина дня" },
     ].filter((s) => s.date);
   }
 

src/pages/ClientDeliveryPage.test.js

@@ -187,4 +187,28 @@ describe("ClientDeliveryPage helpers", () => {
       "По этому заказу согласование доставки завершено или передано логисту.",
     );
   });
+
+  it("skips Sunday when generating fallback delivery slots from Friday", () => {
+    // 2026-04-17 is Friday → next workday = Saturday 18, then Monday 20 (skip Sunday 19)
+    const slots = groupSlotsFromInvitation(
+      { availableSlots: [], deliveryDate: null },
+      new Date("2026-04-17T09:00:00Z"),
+    );
+    const dates = [...new Set(slots.map((s) => s.date))];
+    expect(dates).not.toContain("2026-04-19"); // Sunday
+    expect(dates).toContain("2026-04-18"); // Saturday
+    expect(dates).toContain("2026-04-20"); // Monday
+  });
+
+  it("skips Sunday when generating fallback delivery slots from Saturday", () => {
+    // 2026-04-18 is Saturday → next workday = Monday 20, then Tuesday 21
+    const slots = groupSlotsFromInvitation(
+      { availableSlots: [], deliveryDate: null },
+      new Date("2026-04-18T09:00:00Z"),
+    );
+    const dates = [...new Set(slots.map((s) => s.date))];
+    expect(dates).not.toContain("2026-04-19"); // Sunday
+    expect(dates).toContain("2026-04-20"); // Monday
+    expect(dates).toContain("2026-04-21"); // Tuesday
+  });
 });

supabase/functions/_shared/delivery-invitations.ts

@@ -137,8 +137,22 @@ export const buildDefaultDatedAvailableSlots = (now = new Date()) => {
     return next;
   };
 
-  const firstDay = formatCrimeaDate(addDays(now, 1));
+  // Skip Sunday (getUTCDay() === 0) — never offer Sunday delivery
-  const secondDay = formatCrimeaDate(addDays(now, 2));
+  const isSunday = (date: Date) => date.getUTCDay() === 0;
+
+  const getNextWorkday = (date: Date) => {
+    let next = addDays(date, 1);
+    while (isSunday(next)) {
+      next = addDays(next, 1);
+    }
+    return next;
+  };
+
+  const firstWorkday = getNextWorkday(now);
+  const secondWorkday = getNextWorkday(firstWorkday);
+
+  const firstDay = formatCrimeaDate(firstWorkday);
+  const secondDay = formatCrimeaDate(secondWorkday);
 
   return [
     `${firstDay}, Первая половина дня`,

supabase/functions/confirm-delivery-choice/index.ts

@@ -31,6 +31,13 @@ type ConfirmBody = {
 
 const isValidDate = (value: string) => /^\d{4}-\d{2}-\d{2}$/.test(value);
 
+const isWeekendDate = (value: string) => {
+  if (!isValidDate(value)) return false;
+  const date = new Date(`${value}T12:00:00Z`);
+  const weekday = date.getUTCDay();
+  return weekday === 0;  // 0=Sunday — never allow Sunday delivery
+};
+
 const resolveRequestedSlot = (
   invitation: {
     delivery_date?: string | null;
@@ -52,6 +59,11 @@ const resolveRequestedSlot = (
     return { deliveryDate, deliveryTime, deliveryType };
   }
 
+  // Reject Sunday for delivery (business rule: never deliver on Sunday)
+  if (isWeekendDate(deliveryDate)) {
+    return null;
+  }
+
   const slotLabel = `${deliveryDate}, ${deliveryTime}`;
   const availableSlots = invitation.available_slots || [];
 

supabase/schema.sql

@@ -758,6 +758,11 @@ begin
     raise exception 'Selected slot is not available';
   end if;
 
+  -- Business rule: never allow Sunday delivery (0 = Sunday in extract(dow))
+  if extract(dow from p_delivery_date) = 0 then
+    raise exception 'Delivery is not available on Sunday';
+  end if;
+
   v_token_hash := encode(digest(p_token, 'sha256'), 'hex');
   v_slot_label := concat(p_delivery_date::text, ', ', trim(p_delivery_time));
 

volumes/functions/confirm-delivery-choice/index.ts

@@ -24,10 +24,20 @@ type ConfirmBody = {
   token?: string;
   deliveryDate?: string;
   deliveryTime?: string;
+  deliveryType?: string;
+  pickupDate?: string;
+  pickupTimeSlot?: string;
 };
 
 const isValidDate = (value: string) => /^\d{4}-\d{2}-\d{2}$/.test(value);
 
+const isWeekendDate = (value: string) => {
+  if (!isValidDate(value)) return false;
+  const date = new Date(`${value}T12:00:00Z`);
+  const weekday = date.getUTCDay();
+  return weekday === 0;  // 0=Sunday — never allow Sunday delivery
+};
+
 const resolveRequestedSlot = (
   invitation: {
     delivery_date?: string | null;
@@ -36,6 +46,7 @@ const resolveRequestedSlot = (
   },
   body: ConfirmBody,
 ) => {
+  const deliveryType = body.deliveryType || "delivery";
   const deliveryDate = String(body.deliveryDate || invitation.delivery_date || "").trim();
   const deliveryTime = String(body.deliveryTime || invitation.delivery_time || "").trim();
 
@@ -43,6 +54,16 @@ const resolveRequestedSlot = (
     return null;
   }
 
+  // For pickup, we allow slots outside the invitation's available_slots
+  if (deliveryType === "pickup") {
+    return { deliveryDate, deliveryTime, deliveryType };
+  }
+
+  // Reject Sunday for delivery (business rule: never deliver on Sunday)
+  if (isWeekendDate(deliveryDate)) {
+    return null;
+  }
+
   const slotLabel = `${deliveryDate}, ${deliveryTime}`;
   const availableSlots = invitation.available_slots || [];
 
@@ -50,7 +71,7 @@ const resolveRequestedSlot = (
     return null;
   }
 
-  return { deliveryDate, deliveryTime };
+  return { deliveryDate, deliveryTime, deliveryType };
 };
 
 Deno.serve(async (request) => {
@@ -127,10 +148,12 @@ Deno.serve(async (request) => {
       return jsonResponse({ ok: false, error: "Invitation expired" }, 410, corsHeaders);
     }
 
+    const deliveryType = body.deliveryType || "delivery";
+
     if (invitation.order_group_id) {
       const { data: currentGroup, error: groupError } = await supabase
         .from("order_groups")
-        .select("id, delivery_status")
+        .select("id, delivery_status, delivery_address, customer_address")
         .eq("id", invitation.order_group_id)
         .single();
 
@@ -138,6 +161,14 @@ Deno.serve(async (request) => {
         throw groupError;
       }
 
+      // When user switches from pickup to delivery but has no address → requires_address
+      const hasAddress = invitation.delivery_address?.trim() || currentGroup?.delivery_address?.trim() || currentGroup?.customer_address?.trim();
+      const effectiveDeliveryStatus = deliveryType === "pickup"
+        ? "pickup"
+        : hasAddress
+          ? "agreed"
+          : "requires_address";
+
       if (!isActiveInvitationState(invitation.state) || currentGroup.delivery_status !== "pending_confirmation") {
         return jsonResponse(
           {
@@ -177,15 +208,25 @@ Deno.serve(async (request) => {
         throw invitationUpdateError;
       }
 
+      const groupUpdateData: Record<string, unknown> = {
+        delivery_status: effectiveDeliveryStatus,
+        delivery_date: requestedSlot.deliveryDate,
+        delivery_time: requestedSlot.deliveryTime,
+        delivery_type: deliveryType,
+        notification_status: effectiveDeliveryStatus === "requires_address" ? "address_required" : "confirmed",
+        updated_at: new Date().toISOString(),
+      };
+
+      if (deliveryType === "pickup") {
+        groupUpdateData.pickup_date = body.pickupDate || requestedSlot.deliveryDate || null;
+        groupUpdateData.pickup_time_slot = body.pickupTimeSlot || requestedSlot.deliveryTime || null;
+        // Pickup orders don't need a driver — clear assignment
+        groupUpdateData.assigned_driver_id = null;
+      }
+
       const { error: groupUpdateError } = await supabase
         .from("order_groups")
-        .update({
+        .update(groupUpdateData)
-          delivery_status: "agreed",
-          delivery_date: requestedSlot.deliveryDate,
-          delivery_time: requestedSlot.deliveryTime,
-          notification_status: "confirmed",
-          updated_at: new Date().toISOString(),
-        })
         .eq("id", invitation.order_group_id);
 
       if (groupUpdateError) {
@@ -197,10 +238,13 @@ Deno.serve(async (request) => {
         order_group_id: invitation.order_group_id,
         action: "client_confirmed",
         old_value: currentGroup.delivery_status,
-        new_value: "agreed",
+        new_value: effectiveDeliveryStatus,
         details: {
           delivery_date: requestedSlot.deliveryDate,
           delivery_time: requestedSlot.deliveryTime,
+          delivery_type: deliveryType,
+          pickup_date: body.pickupDate || null,
+          pickup_time_slot: body.pickupTimeSlot || null,
           source: "auto",
         },
       });
@@ -215,6 +259,9 @@ Deno.serve(async (request) => {
           delivery_invitation_id: invitation.id,
           delivery_date: requestedSlot.deliveryDate,
           delivery_time: requestedSlot.deliveryTime,
+          delivery_type: deliveryType,
+          pickup_date: body.pickupDate || null,
+          pickup_time_slot: body.pickupTimeSlot || null,
         },
       });
 
@@ -222,7 +269,8 @@ Deno.serve(async (request) => {
         {
           ok: true,
           orderGroupId: invitation.order_group_id,
-          deliveryStatus: "agreed",
+          deliveryStatus: effectiveDeliveryStatus,
+          pickupCode: groupUpdateData.pickup_code || null,
         },
         200,
         corsHeaders,
@@ -314,6 +362,9 @@ Deno.serve(async (request) => {
         new_delivery_agreement_status: orderUpdate?.deliveryAgreementStatus,
         delivery_date: requestedSlot.deliveryDate,
         delivery_time: requestedSlot.deliveryTime,
+        delivery_type: deliveryType,
+        pickup_date: body.pickupDate || null,
+        pickup_time_slot: body.pickupTimeSlot || null,
       },
     });
 
@@ -329,6 +380,9 @@ Deno.serve(async (request) => {
       payload: {
         delivery_date: requestedSlot.deliveryDate,
         delivery_time: requestedSlot.deliveryTime,
+        delivery_type: deliveryType,
+        pickup_date: body.pickupDate || null,
+        pickup_time_slot: body.pickupTimeSlot || null,
       },
     });