fix: adjusted drag and drop

resources/js/pages/projects/Board.vue

@@ -1,13 +1,24 @@
 <script setup lang="ts">
-import { Form, Head, Link } from '@inertiajs/vue3';
-import { ArrowLeft, ListTodo, Plus } from 'lucide-vue-next';
-import { computed, ref, watch } from 'vue';
+import { Form, Head, Link, useForm } from '@inertiajs/vue3';
+import { ArrowLeft, GripVertical, ListTodo, Plus } from 'lucide-vue-next';
+import { computed, nextTick, ref, watch } from 'vue';
 import { move } from '@/actions/App/Http/Controllers/ProjectBoardController';
 import FeedbackState from '@/components/FeedbackState.vue';
+import FormFeedback from '@/components/FormFeedback.vue';
 import InputError from '@/components/InputError.vue';
 import { TicketCard } from '@/components/tickets';
 import { Badge } from '@/components/ui/badge';
 import { Button } from '@/components/ui/button';
+import {
+    Dialog,
+    DialogContent,
+    DialogDescription,
+    DialogFooter,
+    DialogHeader,
+    DialogTitle,
+} from '@/components/ui/dialog';
+import { useBoardDrag } from '@/composables/useBoardDrag';
+import { useFormProtection } from '@/composables/useFormProtection';
 import { useLocalization } from '@/composables/useLocalization';
 import AppLayout from '@/layouts/AppLayout.vue';
 import { ticketStatusLabel } from '@/lib/tickets';
@@ -67,6 +78,140 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
     (ticket.ticket_status?.allowed_target_statuses ?? []).filter(
         (status) => status.id !== ticket.ticket_status_id,
     );
+
+const moveForm = useForm({ ticket_status_id: 0, redirect_to: 'board' });
+const feedback = useFormProtection(moveForm, { isDirty: () => false });
+const menuPending = ref<number | null>(null);
+const busy = computed(() => moveForm.processing || menuPending.value !== null);
+const choice = ref<{ ticketId: number; columnId: number } | null>(null);
+const lastMove = ref<{ ticketId: number; statusId: number } | null>(null);
+const findTicket = (id: number) =>
+    props.boardColumns
+        .flatMap((column) => column.tickets ?? [])
+        .find((ticket) => ticket.id === id);
+const targetsForColumn = (ticket: TicketModel, columnId: number) => {
+    const statusIds =
+        props.boardColumns
+            .find((column) => column.id === columnId)
+            ?.ticket_statuses?.map((status) => status.id) ?? [];
+    return allowedTargetStatuses(ticket).filter((status) =>
+        statusIds.includes(status.id),
+    );
+};
+const choiceTicket = computed(() =>
+    choice.value ? findTicket(choice.value.ticketId) : undefined,
+);
+const choiceTargets = computed(() =>
+    choice.value && choiceTicket.value
+        ? targetsForColumn(choiceTicket.value, choice.value.columnId)
+        : [],
+);
+const choiceOpen = computed({
+    get: () => choice.value !== null,
+    set: (open: boolean) => {
+        if (!open) {
+            choice.value = null;
+        }
+    },
+});
+
+function submitMove(ticketId: number, statusId: number): void {
+    const ticket = findTicket(ticketId);
+    if (
+        busy.value ||
+        !props.canEditTickets ||
+        !ticket ||
+        !allowedTargetStatuses(ticket).some((status) => status.id === statusId)
+    ) {
+        return;
+    }
+    lastMove.value = { ticketId, statusId };
+    moveForm.ticket_status_id = statusId;
+    moveForm.clearErrors();
+    feedback.submit(move({ project: props.project.id, ticket: ticketId }), {
+        errorBag: `board-ticket-${ticketId}`,
+        preserveScroll: true,
+        onSuccess: async () => {
+            const destination = props.boardColumns.find((column) =>
+                column.ticket_statuses?.some(
+                    (status) => status.id === statusId,
+                ),
+            );
+            if (destination) {
+                selectedColumnId.value = destination.id;
+            }
+            await nextTick();
+            document
+                .getElementById(`ticket-status-${ticketId}`)
+                ?.focus({ preventScroll: true });
+        },
+    });
+}
+
+function dropTicket(ticket: TicketModel, columnId: number): void {
+    const current = findTicket(ticket.id);
+    if (!current || busy.value || !props.canEditTickets) {
+        return;
+    }
+    const targets = targetsForColumn(current, columnId);
+    if (targets.length === 1) {
+        submitMove(current.id, targets[0].id);
+    } else if (targets.length > 1) {
+        moveForm.ticket_status_id = targets[0].id;
+        choice.value = { ticketId: current.id, columnId };
+    }
+}
+
+const {
+    draggedTicket,
+    columnId: dropColumnId,
+    x: dragX,
+    y: dragY,
+    start: startDrag,
+    cancel: cancelDrag,
+} = useBoardDrag({
+    canStart: (ticket) =>
+        props.canEditTickets &&
+        !busy.value &&
+        !choice.value &&
+        allowedTargetStatuses(ticket).length > 0,
+    drop: dropTicket,
+});
+const canDrop = (columnId: number) =>
+    !!draggedTicket.value &&
+    targetsForColumn(draggedTicket.value, columnId).length > 0;
+const dropClasses = (columnId: number) =>
+    !draggedTicket.value
+        ? {}
+        : {
+              'border-primary border-dashed': canDrop(columnId),
+              'ring-2 ring-primary bg-primary/10':
+                  canDrop(columnId) && dropColumnId.value === columnId,
+              'opacity-40': !canDrop(columnId),
+          };
+function confirmMove(): void {
+    if (
+        !choice.value ||
+        !choiceTargets.value.some(
+            (status) => status.id === moveForm.ticket_status_id,
+        )
+    ) {
+        return;
+    }
+    const ticketId = choice.value.ticketId;
+    choice.value = null;
+    submitMove(ticketId, moveForm.ticket_status_id);
+}
+function focusStatus(ticketId: number): void {
+    document.getElementById(`ticket-status-${ticketId}`)?.focus();
+}
+watch(
+    () => [props.project.id, props.boardColumns, props.canEditTickets],
+    () => {
+        cancelDrag();
+        choice.value = null;
+    },
+);
 </script>
 
 <template>
@@ -130,6 +275,13 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
             </header>
 
             <FeedbackState v-if="status" state="success" :title="status" />
+            <FormFeedback
+                :state="feedback.state.value"
+                :description="moveForm.errors.ticket_status_id"
+                @retry="
+                    lastMove && submitMove(lastMove.ticketId, lastMove.statusId)
+                "
+            />
             <FeedbackState
                 v-if="columns.length === 0"
                 state="empty"
@@ -168,10 +320,18 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                 >
                     {{ t('board.scrollHint') }}
                 </p>
+                <p
+                    v-if="canEditTickets"
+                    id="board-drag-hint"
+                    class="text-caption text-muted-foreground"
+                >
+                    {{ t('board.dragHint') }}
+                </p>
                 <section
                     :aria-label="t('board.columns')"
                     aria-describedby="board-scroll-hint"
                     tabindex="0"
+                    data-board-drag-scroll
                     class="gap-column focus-visible:ring-ring/35 flex min-w-0 rounded-md pb-2 focus-visible:outline-none focus-visible:ring-2 md:overflow-x-auto md:overscroll-x-contain"
                 >
                     <section
@@ -179,9 +339,11 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                         :id="`board-column-${column.id}`"
                         :key="`${project.id}-${column.id}`"
                         :aria-labelledby="`board-column-title-${column.id}`"
+                        :data-board-drop-column="column.id"
                         :class="[
                             'bg-muted/40 gap-column w-full min-w-0 shrink-0 flex-col self-stretch rounded-md border p-3 md:flex md:w-80',
                             selectedColumnId === column.id ? 'flex' : 'hidden',
+                            dropClasses(column.id),
                         ]"
                     >
                         <header
@@ -250,6 +412,10 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                     v-for="ticket in group.tickets"
                                     :key="ticket.id"
                                     class="min-w-0"
+                                    :class="{
+                                        'opacity-50':
+                                            draggedTicket?.id === ticket.id,
+                                    }"
                                 >
                                     <TicketCard
                                         :project-id="project.id"
@@ -260,6 +426,36 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                             v-if="canEditTickets"
                                             #actions
                                         >
+                                            <Button
+                                                type="button"
+                                                variant="ghost"
+                                                class="mb-2 w-full cursor-grab touch-none select-none active:cursor-grabbing"
+                                                :disabled="
+                                                    busy ||
+                                                    allowedTargetStatuses(
+                                                        ticket,
+                                                    ).length === 0
+                                                "
+                                                :aria-label="
+                                                    t('board.dragTicket', {
+                                                        key: ticket.ticket_key,
+                                                    })
+                                                "
+                                                aria-describedby="board-drag-hint"
+                                                @pointerdown="
+                                                    startDrag($event, ticket)
+                                                "
+                                                @click.prevent
+                                                @keydown.enter.prevent="
+                                                    focusStatus(ticket.id)
+                                                "
+                                                @keydown.space.prevent="
+                                                    focusStatus(ticket.id)
+                                                "
+                                                ><GripVertical
+                                                    aria-hidden="true"
+                                                />{{ t('board.drag') }}</Button
+                                            >
                                             <Form
                                                 v-bind="
                                                     move.form({
@@ -272,6 +468,12 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                                 :options="{
                                                     preserveScroll: true,
                                                 }"
+                                                :on-before="
+                                                    () =>
+                                                        !busy && !draggedTicket
+                                                "
+                                                @start="menuPending = ticket.id"
+                                                @finish="menuPending = null"
                                                 class="grid min-w-0 gap-2"
                                             >
                                                 <input
@@ -292,6 +494,7 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                                     :id="`ticket-status-${ticket.id}`"
                                                     name="ticket_status_id"
                                                     :disabled="
+                                                        busy ||
                                                         processing ||
                                                         allowedTargetStatuses(
                                                             ticket,
@@ -345,6 +548,7 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                                                     type="submit"
                                                     variant="outline"
                                                     :disabled="
+                                                        busy ||
                                                         processing ||
                                                         allowedTargetStatuses(
                                                             ticket,
@@ -381,6 +585,94 @@ const allowedTargetStatuses = (ticket: TicketModel) =>
                     </section>
                 </section>
             </template>
+            <div
+                v-if="draggedTicket"
+                class="bg-card fixed inset-x-0 bottom-0 z-40 border-t p-3 shadow-lg md:hidden"
+                data-board-mobile-targets
+            >
+                <p class="text-caption mb-2 font-semibold">
+                    {{ t('board.dropHint') }}
+                </p>
+                <div class="flex gap-2 overflow-x-auto" data-board-drag-scroll>
+                    <div
+                        v-for="column in columns"
+                        :key="column.id"
+                        :data-board-drop-column="column.id"
+                        :class="dropClasses(column.id)"
+                        class="text-body flex min-h-20 w-36 shrink-0 items-center rounded-md border p-3"
+                    >
+                        {{ column.name }}
+                    </div>
+                </div>
+            </div>
+            <div
+                v-if="draggedTicket"
+                aria-hidden="true"
+                class="bg-primary text-primary-foreground pointer-events-none fixed z-50 max-w-48 rounded-md px-3 py-2 shadow-lg"
+                :style="{
+                    left: `${Math.max(0, dragX - 80)}px`,
+                    top: `${Math.max(0, dragY - 56)}px`,
+                }"
+            >
+                {{ draggedTicket.ticket_key }}
+            </div>
+            <p class="sr-only" aria-live="polite">
+                {{
+                    draggedTicket
+                        ? t('board.dragging', { key: draggedTicket.ticket_key })
+                        : ''
+                }}
+            </p>
+            <Dialog v-model:open="choiceOpen">
+                <DialogContent>
+                    <DialogHeader>
+                        <DialogTitle>{{ t('board.chooseStatus') }}</DialogTitle>
+                        <DialogDescription>{{
+                            t('board.chooseStatusDescription', {
+                                key: choiceTicket?.ticket_key ?? '',
+                            })
+                        }}</DialogDescription>
+                    </DialogHeader>
+                    <form class="grid gap-4" @submit.prevent="confirmMove">
+                        <label
+                            for="board-drop-status"
+                            class="text-body font-semibold"
+                            >{{ t('board.targetStatus') }}</label
+                        >
+                        <select
+                            id="board-drop-status"
+                            v-model="moveForm.ticket_status_id"
+                            class="border-input bg-card text-body min-h-control focus-visible:ring-ring/35 w-full rounded-md border px-3 py-2 focus-visible:outline-none focus-visible:ring-2"
+                        >
+                            <option
+                                v-for="target in choiceTargets"
+                                :key="target.id"
+                                :value="target.id"
+                            >
+                                {{
+                                    ticketStatusLabel(
+                                        target,
+                                        t('tickets.noStatus'),
+                                    )
+                                }}
+                            </option>
+                        </select>
+                        <DialogFooter>
+                            <Button
+                                type="button"
+                                variant="outline"
+                                @click="choiceOpen = false"
+                                >{{ t('common.cancel') }}</Button
+                            >
+                            <Button
+                                type="submit"
+                                :disabled="busy || choiceTargets.length === 0"
+                                >{{ t('board.updateStatus') }}</Button
+                            >
+                        </DialogFooter>
+                    </form>
+                </DialogContent>
+            </Dialog>
         </div>
     </AppLayout>
 </template>