From afc881a7c65de6827e2346aafe290bc5ffc65122 Mon Sep 17 00:00:00 2001
From: Denis Bykhov <bykhov.denis@gmail.com>
Date: Mon, 7 Aug 2023 18:39:04 +0600
Subject: [PATCH] UBER-668 UBER-669 UBER-670 UBER-671 (#3566)

Signed-off-by: Denis Bykhov <bykhov.denis@gmail.com>
---
 models/calendar/src/index.ts                  |  25 +-
 models/calendar/src/plugin.ts                 |   3 +-
 packages/ui/src/index.ts                      |   1 -
 .../components/CalendarEventPresenter.svelte  |  37 +++
 .../src/components/CalendarView.svelte        | 128 ++++------
 .../src/components}/DayCalendar.svelte        | 240 ++++++++++++------
 .../src/components/EventElement.svelte        | 124 +++++++--
 plugins/calendar-resources/src/index.ts       |   7 +-
 plugins/calendar/src/index.ts                 |  12 +-
 plugins/calendar/src/utils.ts                 |  10 +-
 10 files changed, 406 insertions(+), 181 deletions(-)
 create mode 100644 plugins/calendar-resources/src/components/CalendarEventPresenter.svelte
 rename {packages/ui/src/components/calendar => plugins/calendar-resources/src/components}/DayCalendar.svelte (77%)

diff --git a/models/calendar/src/index.ts b/models/calendar/src/index.ts
index 0e8d100a48..d7f09e8d9d 100644
--- a/models/calendar/src/index.ts
+++ b/models/calendar/src/index.ts
@@ -14,7 +14,15 @@
 //
 
 import activity from '@hcengineering/activity'
-import { Calendar, Event, ReccuringEvent, ReccuringInstance, RecurringRule, calendarId } from '@hcengineering/calendar'
+import {
+  Calendar,
+  CalendarEventPresenter,
+  Event,
+  ReccuringEvent,
+  ReccuringInstance,
+  RecurringRule,
+  calendarId
+} from '@hcengineering/calendar'
 import { Contact } from '@hcengineering/contact'
 import { DateRangeMode, Domain, IndexKind, Markup, Ref, Timestamp } from '@hcengineering/core'
 import {
@@ -22,6 +30,7 @@ import {
   Builder,
   Collection,
   Index,
+  Mixin,
   Model,
   Prop,
   ReadOnly,
@@ -35,13 +44,14 @@ import {
 } from '@hcengineering/model'
 import attachment from '@hcengineering/model-attachment'
 import contact from '@hcengineering/model-contact'
-import core, { TAttachedDoc } from '@hcengineering/model-core'
+import core, { TAttachedDoc, TClass } from '@hcengineering/model-core'
 import { TSpaceWithStates } from '@hcengineering/model-task'
 import view, { createAction } from '@hcengineering/model-view'
 import workbench from '@hcengineering/model-workbench'
 import notification from '@hcengineering/notification'
 import setting from '@hcengineering/setting'
 import calendar from './plugin'
+import { AnyComponent } from '@hcengineering/ui'
 
 export * from '@hcengineering/calendar'
 export { calendarId } from '@hcengineering/calendar'
@@ -115,8 +125,13 @@ export class TReccuringInstance extends TEvent implements ReccuringInstance {
   virtual?: boolean
 }
 
+@Mixin(calendar.mixin.CalendarEventPresenter, core.class.Class)
+export class TCalendarEventPresenter extends TClass implements CalendarEventPresenter {
+  presenter!: AnyComponent
+}
+
 export function createModel (builder: Builder): void {
-  builder.createModel(TCalendar, TReccuringEvent, TReccuringInstance, TEvent)
+  builder.createModel(TCalendar, TReccuringEvent, TReccuringInstance, TEvent, TCalendarEventPresenter)
 
   builder.createDoc(
     workbench.class.Application,
@@ -131,6 +146,10 @@ export function createModel (builder: Builder): void {
     calendar.app.Calendar
   )
 
+  builder.mixin(calendar.class.Event, core.class.Class, calendar.mixin.CalendarEventPresenter, {
+    presenter: calendar.component.CalendarEventPresenter
+  })
+
   builder.createDoc(
     view.class.Viewlet,
     core.space.Model,
diff --git a/models/calendar/src/plugin.ts b/models/calendar/src/plugin.ts
index 9da16f06e2..821b550e81 100644
--- a/models/calendar/src/plugin.ts
+++ b/models/calendar/src/plugin.ts
@@ -28,7 +28,8 @@ export default mergeIds(calendarId, calendar, {
     IntegrationConnect: '' as AnyComponent,
     CreateCalendar: '' as AnyComponent,
     EventPresenter: '' as AnyComponent,
-    CalendarIntegrationIcon: '' as AnyComponent
+    CalendarIntegrationIcon: '' as AnyComponent,
+    CalendarEventPresenter: '' as AnyComponent
   },
   action: {
     SaveEventReminder: '' as Ref<Action>,
diff --git a/packages/ui/src/index.ts b/packages/ui/src/index.ts
index 945359e80f..2456b32d58 100644
--- a/packages/ui/src/index.ts
+++ b/packages/ui/src/index.ts
@@ -172,7 +172,6 @@ export { default as Panel } from './components/Panel.svelte'
 export { default as MonthCalendar } from './components/calendar/MonthCalendar.svelte'
 export { default as YearCalendar } from './components/calendar/YearCalendar.svelte'
 export { default as WeekCalendar } from './components/calendar/WeekCalendar.svelte'
-export { default as DayCalendar } from './components/calendar/DayCalendar.svelte'
 
 export { default as FocusHandler } from './components/FocusHandler.svelte'
 export { default as ListView } from './components/ListView.svelte'
diff --git a/plugins/calendar-resources/src/components/CalendarEventPresenter.svelte b/plugins/calendar-resources/src/components/CalendarEventPresenter.svelte
new file mode 100644
index 0000000000..321b58eca3
--- /dev/null
+++ b/plugins/calendar-resources/src/components/CalendarEventPresenter.svelte
@@ -0,0 +1,37 @@
+<!--
+// Copyright © 2023 Hardcore Engineering Inc.
+//
+// Licensed under the Eclipse Public License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License. You may
+// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//
+// See the License for the specific language governing permissions and
+// limitations under the License.
+-->
+<script lang="ts">
+  import { Event } from '@hcengineering/calendar'
+  import { addZero } from '@hcengineering/ui'
+
+  export let event: Event
+  export let oneRow: boolean = false
+  export let narrow: boolean = false
+  export let size: { width: number; height: number }
+
+  $: startDate = new Date(event.date)
+  $: endDate = new Date(event.dueDate)
+
+  const getTime = (date: Date): string => {
+    return `${addZero(date.getHours())}:${addZero(date.getMinutes())}`
+  }
+</script>
+
+{#if !narrow}
+  <b class="overflow-label">{event.title}</b>
+{/if}
+{#if !oneRow}
+  <span class="overflow-label text-sm">{getTime(startDate)}-{getTime(endDate)}</span>
+{/if}
diff --git a/plugins/calendar-resources/src/components/CalendarView.svelte b/plugins/calendar-resources/src/components/CalendarView.svelte
index f14aa9099e..38d92c16b6 100644
--- a/plugins/calendar-resources/src/components/CalendarView.svelte
+++ b/plugins/calendar-resources/src/components/CalendarView.svelte
@@ -13,7 +13,7 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import { Calendar, Event, getAllEvents } from '@hcengineering/calendar'
+  import { Calendar, Event, generateEventId, getAllEvents } from '@hcengineering/calendar'
   import { PersonAccount } from '@hcengineering/contact'
   import {
     Class,
@@ -30,27 +30,25 @@
   import {
     AnyComponent,
     Button,
-    CalendarItem,
-    DayCalendar,
     DropdownLabelsIntl,
     IconBack,
     IconForward,
-    MILLISECONDS_IN_DAY,
     MonthCalendar,
     YearCalendar,
     areDatesEqual,
     getMonday,
     showPopup
   } from '@hcengineering/ui'
-  import { CalendarMode } from '../index'
+  import { CalendarMode, DayCalendar } from '../index'
   import calendar from '../plugin'
   import Day from './Day.svelte'
-  import EventElement from './EventElement.svelte'
 
   export let _class: Ref<Class<Doc>> = calendar.class.Event
   export let query: DocumentQuery<Event> | undefined = undefined
   export let options: FindOptions<Event> | undefined = undefined
   export let createComponent: AnyComponent | undefined = calendar.component.CreateEvent
+  export let dragItem: Doc | undefined = undefined
+  export let dragEventClass: Ref<Class<Event>> = calendar.class.Event
   export let allowedModes: CalendarMode[] = [
     CalendarMode.Days,
     CalendarMode.Week,
@@ -117,7 +115,6 @@
   const calendarsQuery = createQuery()
 
   let calendars: Calendar[] = []
-  const offsetTZ = new Date().getTimezoneOffset() * 60 * 1000
 
   calendarsQuery.query(calendar.class.Calendar, { createdBy: me._id }, (res) => {
     calendars = res
@@ -233,6 +230,50 @@
     ddItems = ddItems
   }
 
+  const dragItemId = 'drag_item' as Ref<Event>
+
+  function dragEnter (e: CustomEvent<any>) {
+    if (dragItem !== undefined) {
+      const current = raw.find((p) => p._id === dragItemId)
+      if (current !== undefined) {
+        current.attachedTo = dragItem._id
+        current.attachedToClass = dragItem._class
+        current.date = e.detail.date.getTime()
+        current.dueDate = new Date(e.detail.date).setMinutes(new Date(e.detail.date).getMinutes() + 30)
+      } else {
+        const me = getCurrentAccount() as PersonAccount
+        raw.push({
+          _id: dragItemId,
+          allDay: false,
+          eventId: generateEventId(),
+          title: '',
+          description: '',
+          access: 'owner',
+          attachedTo: dragItem._id,
+          attachedToClass: dragItem._class,
+          _class: dragEventClass,
+          collection: 'events',
+          space: dragItem.space,
+          modifiedBy: me._id,
+          participants: [me.person],
+          modifiedOn: Date.now(),
+          date: e.detail.date.getTime(),
+          dueDate: new Date(e.detail.date).setMinutes(new Date(e.detail.date).getMinutes() + 30)
+        })
+      }
+      raw = raw
+    }
+  }
+
+  $: clear(dragItem)
+
+  function clear (dragItem: Doc | undefined) {
+    if (dragItem === undefined) {
+      raw = raw.filter((p) => p._id !== dragItemId)
+      objects = getAllEvents(raw, from, to)
+    }
+  }
+
   $: getDdItems(allowedModes)
 
   let ddItems: {
@@ -247,55 +288,6 @@
     { id: 'month', label: calendar.string.ModeMonth, mode: CalendarMode.Month },
     { id: 'year', label: calendar.string.ModeYear, mode: CalendarMode.Year }
   ]
-
-  const toCalendar = (
-    events: Event[],
-    date: Date,
-    days: number = 1,
-    startHour: number = 0,
-    endHour: number = 24
-  ): CalendarItem[] => {
-    const result: CalendarItem[] = []
-    for (let day = 0; day < days; day++) {
-      const startDay = new Date(MILLISECONDS_IN_DAY * day + date.getTime()).setHours(0, 0, 0, 0)
-      const startDate = new Date(MILLISECONDS_IN_DAY * day + date.getTime()).setHours(startHour, 0, 0, 0)
-      const lastDate = new Date(MILLISECONDS_IN_DAY * day + date.getTime()).setHours(endHour, 0, 0, 0)
-      events.forEach((event) => {
-        const eventStart = event.allDay ? event.date + offsetTZ : event.date
-        const eventEnd = event.allDay ? event.dueDate + offsetTZ : event.dueDate
-        if ((eventStart < lastDate && eventEnd > startDate) || (eventStart === eventEnd && eventStart === startDay)) {
-          result.push({
-            _id: event._id,
-            allDay: event.allDay,
-            date: eventStart,
-            dueDate: eventEnd,
-            day,
-            access: event.access
-          })
-        }
-      })
-    }
-    const sd = date.setHours(0, 0, 0, 0)
-    const ld = new Date(MILLISECONDS_IN_DAY * (days - 1) + date.getTime()).setHours(23, 59, 59, 999)
-    events
-      .filter((ev) => ev.allDay)
-      .sort((a, b) => b.dueDate - b.date - (a.dueDate - a.date))
-      .forEach((event) => {
-        const eventStart = event.date + offsetTZ
-        const eventEnd = event.dueDate + offsetTZ
-        if ((eventStart < ld && eventEnd > sd) || (eventStart === eventEnd && eventStart === sd)) {
-          result.push({
-            _id: event._id,
-            allDay: event.allDay,
-            date: eventStart,
-            dueDate: eventEnd,
-            day: -1,
-            access: event.access
-          })
-        }
-      })
-    return result
-  }
 </script>
 
 <div class="calendar-header">
@@ -383,7 +375,7 @@
   </MonthCalendar>
 {:else if mode === CalendarMode.Week}
   <DayCalendar
-    events={toCalendar(objects, currentDate, 7)}
+    events={objects}
     {mondayStart}
     displayedDaysCount={7}
     startFromWeekStart={false}
@@ -391,18 +383,12 @@
     bind:currentDate
     on:create={(e) => showCreateDialog(e.detail.date, e.detail.withTime)}
     on:drop
-  >
-    <svelte:fragment slot="event" let:id let:size>
-      {@const event = objects.find((event) => event._id === id)}
-      {#if event}
-        <EventElement {event} {size} />
-      {/if}
-    </svelte:fragment>
-  </DayCalendar>
+    on:dragenter={dragEnter}
+  />
 {:else if mode === CalendarMode.Day || mode === CalendarMode.Days}
   {#key mode}
     <DayCalendar
-      events={toCalendar(objects, currentDate, mode === CalendarMode.Days ? 3 : 1)}
+      events={objects}
       {mondayStart}
       displayedDaysCount={mode === CalendarMode.Days ? 3 : 1}
       startFromWeekStart={false}
@@ -410,14 +396,8 @@
       bind:currentDate
       on:create={(e) => showCreateDialog(e.detail.date, e.detail.withTime)}
       on:drop
-    >
-      <svelte:fragment slot="event" let:id let:size>
-        {@const event = objects.find((event) => event._id === id)}
-        {#if event}
-          <EventElement {event} {size} />
-        {/if}
-      </svelte:fragment>
-    </DayCalendar>
+      on:dragenter={dragEnter}
+    />
   {/key}
 {/if}
 
diff --git a/packages/ui/src/components/calendar/DayCalendar.svelte b/plugins/calendar-resources/src/components/DayCalendar.svelte
similarity index 77%
rename from packages/ui/src/components/calendar/DayCalendar.svelte
rename to plugins/calendar-resources/src/components/DayCalendar.svelte
index 698bc88c3c..5eb138f056 100644
--- a/packages/ui/src/components/calendar/DayCalendar.svelte
+++ b/plugins/calendar-resources/src/components/DayCalendar.svelte
@@ -13,28 +13,29 @@
 // limitations under the License.
 -->
 <script lang="ts">
+  import { Event } from '@hcengineering/calendar'
   import { Timestamp } from '@hcengineering/core'
-  import { createEventDispatcher, onMount } from 'svelte'
   import ui, {
-    resizeObserver,
-    deviceOptionsStore as deviceInfo,
-    Scroller,
-    Label,
     ActionIcon,
+    CalendarItem,
+    IconDownOutline,
     IconUpOutline,
-    IconDownOutline
-  } from '../..'
-  import {
+    Label,
     MILLISECONDS_IN_DAY,
+    Scroller,
     addZero,
+    areDatesEqual,
+    deviceOptionsStore as deviceInfo,
     day as getDay,
     getMonday,
     getWeekDayName,
-    areDatesEqual
-  } from './internal/DateUtils'
-  import { CalendarItem } from '../../types'
+    resizeObserver
+  } from '@hcengineering/ui'
+  import { createEventDispatcher, onMount } from 'svelte'
+  import calendar from '../plugin'
+  import EventElement from './EventElement.svelte'
 
-  export let events: CalendarItem[]
+  export let events: Event[]
   export let mondayStart = true
   export let selectedDate: Date = new Date()
   export let currentDate: Date = selectedDate
@@ -54,6 +55,59 @@
   }
   const rem = (n: number): number => n * fontSize
 
+  const offsetTZ = new Date().getTimezoneOffset() * 60 * 1000
+
+  const toCalendar = (
+    events: Event[],
+    date: Date,
+    days: number = 1,
+    startHour: number = 0,
+    endHour: number = 24
+  ): CalendarItem[] => {
+    const result: CalendarItem[] = []
+    for (let day = 0; day < days; day++) {
+      const startDay = new Date(MILLISECONDS_IN_DAY * day + date.getTime()).setHours(0, 0, 0, 0)
+      const startDate = new Date(MILLISECONDS_IN_DAY * day + date.getTime()).setHours(startHour, 0, 0, 0)
+      const lastDate = new Date(MILLISECONDS_IN_DAY * day + date.getTime()).setHours(endHour, 0, 0, 0)
+      events.forEach((event) => {
+        const eventStart = event.allDay ? event.date + offsetTZ : event.date
+        const eventEnd = event.allDay ? event.dueDate + offsetTZ : event.dueDate
+        if ((eventStart < lastDate && eventEnd > startDate) || (eventStart === eventEnd && eventStart === startDay)) {
+          result.push({
+            _id: event._id,
+            allDay: event.allDay,
+            date: eventStart,
+            dueDate: eventEnd,
+            day,
+            access: event.access
+          })
+        }
+      })
+    }
+    const sd = date.setHours(0, 0, 0, 0)
+    const ld = new Date(MILLISECONDS_IN_DAY * (days - 1) + date.getTime()).setHours(23, 59, 59, 999)
+    events
+      .filter((ev) => ev.allDay)
+      .sort((a, b) => b.dueDate - b.date - (a.dueDate - a.date))
+      .forEach((event) => {
+        const eventStart = event.date + offsetTZ
+        const eventEnd = event.dueDate + offsetTZ
+        if ((eventStart < ld && eventEnd > sd) || (eventStart === eventEnd && eventStart === sd)) {
+          result.push({
+            _id: event._id,
+            allDay: event.allDay,
+            date: eventStart,
+            dueDate: eventEnd,
+            day: -1,
+            access: event.access
+          })
+        }
+      })
+    return result
+  }
+
+  $: calendarEvents = toCalendar(events, currentDate, displayedDaysCount, startHour, displayedHours + startHour)
+
   $: fontSize = $deviceInfo.fontSize
   $: docHeight = $deviceInfo.docHeight
   $: cellHeight = 4 * fontSize
@@ -88,7 +142,7 @@
   let calendarWidth: number = 0
   let calendarRect: DOMRect
   let colWidth: number = 0
-  let newEvents = events
+  let newEvents = calendarEvents
   let grid: CalendarGrid[] = Array<CalendarGrid>(displayedDaysCount)
   let alldays: CalendarItem[] = []
   let alldaysGrid: CalendarADGrid[] = Array<CalendarADGrid>(displayedDaysCount)
@@ -105,8 +159,8 @@
   let shortAlldays: { id: string; day: number; fixRow?: boolean }[] = []
   let moreCounts: number[] = Array<number>(displayedDaysCount)
 
-  $: if (newEvents !== events) {
-    newEvents = events
+  $: if (newEvents !== calendarEvents) {
+    newEvents = calendarEvents
     grid = new Array<CalendarGrid>(displayedDaysCount)
     alldaysGrid = new Array<CalendarADGrid>(displayedDaysCount)
     alldays = []
@@ -187,12 +241,12 @@
     adMaxRow++
   }
   const prepareAllDays = () => {
-    alldays = events.filter((ev) => ev.day === -1)
+    alldays = calendarEvents.filter((ev) => ev.allDay)
     adRows = []
     for (let i = 0; i < displayedDaysCount; i++) alldaysGrid[i] = { alldays: [null] }
     adMaxRow = 1
     alldays.forEach((event) => {
-      const days = events
+      const days = calendarEvents
         .filter((ev) => ev.allDay && ev.day !== -1 && event._id === ev._id)
         .map((ev) => {
           return ev.day
@@ -288,7 +342,8 @@
     result.bottom =
       cellHeight * (displayedHours - startHour - endTime.hours - 1) +
       ((60 - endTime.mins) / 60) * cellHeight +
-      getGridOffset(endTime.mins, true)
+      getGridOffset(endTime.mins, true) +
+      (showHeader ? 0 : rem(2.5))
     let cols = 1
     let index: number = 0
     grid[event.day].columns.forEach((col, i) =>
@@ -414,7 +469,7 @@
     {/each}
 
     <div class="sticky-header allday-header text-sm content-dark-color">
-      All day
+      <Label label={calendar.string.AllDay} />
       {#if (!minimizedAD && adMaxRow > maxAD) || (minimizedAD && adMaxRow > minAD)}
         <ActionIcon
           icon={shownAD ? IconUpOutline : IconDownOutline}
@@ -432,19 +487,26 @@
                 <div style:min-height={`${shownHeightAD - cellBorder * 2}px`} />
                 {#each alldays as event, i}
                   {@const rect = getADRect(event._id)}
-                  <!-- svelte-ignore a11y-no-noninteractive-tabindex -->
-                  <div
-                    class="calendar-element"
-                    style:top={`${rect.top}px`}
-                    style:height={`${rect.height}px`}
-                    style:left={`${rect.left}px`}
-                    style:width={`${rect.width}px`}
-                    style:opacity={rect.visibility === 0 ? 0.4 : 1}
-                    style:--mask-image={getMask(rect.visibility)}
-                    tabindex={500 + i}
-                  >
-                    <slot name="event" id={event._id} size={{ width: rect.width, height: rect.height }} />
-                  </div>
+                  {@const ev = events.find((p) => p._id === event._id)}
+                  {#if ev}
+                    <!-- svelte-ignore a11y-no-noninteractive-tabindex -->
+                    <div
+                      class="calendar-element"
+                      style:top={`${rect.top}px`}
+                      style:height={`${rect.height}px`}
+                      style:left={`${rect.left}px`}
+                      style:width={`${rect.width}px`}
+                      style:opacity={rect.visibility === 0 ? 0.4 : 1}
+                      style:--mask-image={getMask(rect.visibility)}
+                      tabindex={500 + i}
+                    >
+                      <EventElement
+                        hourHeight={cellHeight}
+                        event={ev}
+                        size={{ width: rect.width, height: rect.height }}
+                      />
+                    </div>
+                  {/if}
                 {/each}
               {/key}{/key}{/key}
         </Scroller>
@@ -452,38 +514,44 @@
         {#key [styleAD, calendarWidth, displayedDaysCount]}
           {#each alldays as event, i}
             {@const rect = getADRect(event._id)}
-            <!-- svelte-ignore a11y-no-noninteractive-tabindex -->
-            <div
-              class="calendar-element"
-              style:top={`${rect.top}px`}
-              style:height={`${rect.height}px`}
-              style:left={`${rect.left}px`}
-              style:width={`${rect.width}px`}
-              style:opacity={rect.visibility === 0 ? 0.4 : 1}
-              style:--mask-image={getMask(rect.visibility)}
-              tabindex={500 + i}
-            >
-              <slot name="event" id={event._id} size={{ width: rect.width, height: rect.height }} />
-            </div>
+            {@const ev = events.find((p) => p._id === event._id)}
+            {#if ev}
+              <!-- svelte-ignore a11y-no-noninteractive-tabindex -->
+              <div
+                class="calendar-element"
+                style:top={`${rect.top}px`}
+                style:height={`${rect.height}px`}
+                style:left={`${rect.left}px`}
+                style:width={`${rect.width}px`}
+                style:opacity={rect.visibility === 0 ? 0.4 : 1}
+                style:--mask-image={getMask(rect.visibility)}
+                tabindex={500 + i}
+              >
+                <EventElement hourHeight={cellHeight} event={ev} size={{ width: rect.width, height: rect.height }} />
+              </div>
+            {/if}
           {/each}
         {/key}
       {:else}
         {#key [styleAD, calendarWidth, displayedDaysCount]}
           {#each shortAlldays as event, i}
             {@const rect = getADRect(event.id, event.day, event.fixRow)}
-            <!-- svelte-ignore a11y-no-noninteractive-tabindex -->
-            <div
-              class="calendar-element"
-              style:top={`${rect.top}px`}
-              style:height={`${rect.height}px`}
-              style:left={`${rect.left}px`}
-              style:width={`${rect.width}px`}
-              style:opacity={rect.visibility === 0 ? 0.4 : 1}
-              style:--mask-image={getMask(rect.visibility)}
-              tabindex={500 + i}
-            >
-              <slot name="event" id={event.id} size={{ width: rect.width, height: rect.height }} />
-            </div>
+            {@const ev = events.find((p) => p._id === event.id)}
+            {#if ev}
+              <!-- svelte-ignore a11y-no-noninteractive-tabindex -->
+              <div
+                class="calendar-element"
+                style:top={`${rect.top}px`}
+                style:height={`${rect.height}px`}
+                style:left={`${rect.left}px`}
+                style:width={`${rect.width}px`}
+                style:opacity={rect.visibility === 0 ? 0.4 : 1}
+                style:--mask-image={getMask(rect.visibility)}
+                tabindex={500 + i}
+              >
+                <EventElement hourHeight={cellHeight} event={ev} size={{ width: rect.width, height: rect.height }} />
+              </div>
+            {/if}
           {/each}
           {#each moreCounts as more, day}
             {@const addon = shortAlldays.length}
@@ -530,7 +598,11 @@
           style:width={`${colWidth}px`}
           style:grid-column={`col-start ${dayOfWeek + 1} / ${dayOfWeek + 2}`}
           style:grid-row={`row-start ${hourOfDay * 2 + 1} / row-start ${hourOfDay * 2 + 3}`}
-          on:dragover|preventDefault
+          on:dragenter={(e) => {
+            dispatch('dragenter', {
+              date: new Date(day.setHours(hourOfDay + startHour, 0, 0, 0))
+            })
+          }}
           on:drop|preventDefault={(e) => {
             dispatch('drop', {
               day,
@@ -552,26 +624,35 @@
     {#key [styleAD, calendarWidth, displayedDaysCount]}
       {#each newEvents.filter((ev) => !ev.allDay) as event, i}
         {@const rect = getRect(event)}
-        <!-- svelte-ignore a11y-no-noninteractive-tabindex -->
-        <div
-          class="calendar-element"
-          style:top={`${rect.top}px`}
-          style:bottom={`${rect.bottom}px`}
-          style:left={`${rect.left}px`}
-          style:right={`${rect.right}px`}
-          style:opacity={rect.visibility === 0 ? 0.4 : 1}
-          style:--mask-image={'none'}
-          tabindex={1000 + i}
-        >
-          <slot
-            name="event"
-            id={event._id}
-            size={{
-              width: rect.width,
-              height: (calendarRect?.height ?? rect.top + rect.bottom) - rect.top - rect.bottom
-            }}
-          />
-        </div>
+        {@const ev = events.find((p) => p._id === event._id)}
+        {#if ev}
+          <!-- svelte-ignore a11y-no-noninteractive-tabindex -->
+          <div
+            class="calendar-element"
+            style:top={`${rect.top}px`}
+            style:bottom={`${rect.bottom}px`}
+            style:left={`${rect.left}px`}
+            style:right={`${rect.right}px`}
+            style:opacity={rect.visibility === 0 ? 0.4 : 1}
+            style:--mask-image={'none'}
+            tabindex={1000 + i}
+          >
+            <EventElement
+              event={ev}
+              hourHeight={cellHeight}
+              size={{
+                width: rect.width,
+                height: (calendarRect?.height ?? rect.top + rect.bottom) - rect.top - rect.bottom
+              }}
+              on:drop={(e) => {
+                dispatch('drop', {
+                  date: new Date(event.date)
+                })
+              }}
+              on:resize={() => (events = events)}
+            />
+          </div>
+        {/if}
       {/each}
     {/key}
   </div>
@@ -596,6 +677,7 @@
     mask-image: var(--mask-image, none);
     --webkit-mask-image: var(--mask-image, none);
     border-radius: 0.25rem;
+    pointer-events: none;
   }
   .sticky-header {
     position: sticky;
diff --git a/plugins/calendar-resources/src/components/EventElement.svelte b/plugins/calendar-resources/src/components/EventElement.svelte
index 95481825bc..d4195c6215 100644
--- a/plugins/calendar-resources/src/components/EventElement.svelte
+++ b/plugins/calendar-resources/src/components/EventElement.svelte
@@ -13,47 +13,141 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import { Event } from '@hcengineering/calendar'
-  import { MILLISECONDS_IN_MINUTE, addZero, showPanel, tooltip } from '@hcengineering/ui'
-  import view from '@hcengineering/view'
+  import calendar, { CalendarEventPresenter, Event } from '@hcengineering/calendar'
+  import { Doc, DocumentUpdate } from '@hcengineering/core'
+  import { getClient } from '@hcengineering/presentation'
+  import { Component, MILLISECONDS_IN_MINUTE, deviceOptionsStore, showPopup, tooltip } from '@hcengineering/ui'
+  import view, { ObjectEditor } from '@hcengineering/view'
+  import { createEventDispatcher } from 'svelte'
   import EventPresenter from './EventPresenter.svelte'
 
   export let event: Event
+  export let hourHeight: number
   export let size: { width: number; height: number }
 
-  $: startDate = new Date(event.date)
-  $: endDate = new Date(event.dueDate)
   $: oneRow = size.height < 42 || event.allDay
   $: narrow = event.dueDate - event.date < MILLISECONDS_IN_MINUTE * 25
   $: empty = size.width < 44
 
-  const getTime = (date: Date): string => {
-    return `${addZero(date.getHours())}:${addZero(date.getMinutes())}`
+  function click () {
+    const editor = hierarchy.classHierarchyMixin<Doc, ObjectEditor>(event._class, view.mixin.ObjectEditor)
+    if (editor?.editor !== undefined) {
+      showPopup(editor.editor, { object: event })
+    }
+  }
+
+  const client = getClient()
+  const hierarchy = client.getHierarchy()
+  $: presenter = hierarchy.classHierarchyMixin<Doc, CalendarEventPresenter>(
+    event._class,
+    calendar.mixin.CalendarEventPresenter
+  )
+
+  let div: HTMLDivElement
+
+  const dispatch = createEventDispatcher()
+
+  $: fontSize = $deviceOptionsStore.fontSize
+
+  function dragStart (e: DragEvent) {
+    if (event.allDay) return
+    originDate = event.date
+    originDueDate = event.dueDate
+    const rect = div.getBoundingClientRect()
+    const topThreshold = rect.y + fontSize / 2
+    if (e.dataTransfer) {
+      e.dataTransfer.effectAllowed = 'move'
+      e.dataTransfer.dropEffect = 'move'
+    }
+    dragInitY = e.y
+    if (e.y < topThreshold) {
+      dragDirection = 'top'
+    } else {
+      const bottomThreshold = rect.y + rect.height - fontSize / 2
+      if (e.y > bottomThreshold) {
+        dragDirection = 'bottom'
+      } else {
+        dragDirection = 'mid'
+      }
+    }
+  }
+
+  let originDate = event.date
+  let originDueDate = event.dueDate
+  $: pixelPer15Min = hourHeight / 4
+  let dragInitY: number | undefined
+  let dragDirection: 'bottom' | 'mid' | 'top' | undefined
+
+  function drag (e: DragEvent) {
+    if (event.allDay) return
+    if (dragInitY !== undefined) {
+      const diff = Math.floor((e.y - dragInitY) / pixelPer15Min)
+      if (diff) {
+        if (dragDirection !== 'bottom') {
+          const newValue = new Date(originDate).setMinutes(new Date(originDate).getMinutes() + 15 * diff)
+          if (dragDirection === 'top') {
+            if (newValue < event.dueDate) {
+              event.date = newValue
+              dispatch('resize')
+            }
+          } else {
+            const newDue = new Date(originDueDate).setMinutes(new Date(originDueDate).getMinutes() + 15 * diff)
+            event.date = newValue
+            event.dueDate = newDue
+            dispatch('resize')
+          }
+        } else {
+          const newDue = new Date(originDueDate).setMinutes(new Date(originDueDate).getMinutes() + 15 * diff)
+          if (newDue > event.date) {
+            event.dueDate = newDue
+            dispatch('resize')
+          }
+        }
+      }
+    }
+  }
+
+  async function drop () {
+    const update: DocumentUpdate<Event> = {}
+    if (originDate !== event.date) {
+      update.date = event.date
+    }
+    if (originDueDate !== event.dueDate) {
+      update.dueDate = event.dueDate
+    }
+    if (Object.keys(update).length > 0) {
+      await client.update(event, {
+        dueDate: event.dueDate,
+        date: event.date
+      })
+    }
   }
 </script>
 
 {#if event}
   <!-- svelte-ignore a11y-click-events-have-key-events -->
   <div
+    bind:this={div}
     class="event-container"
     class:oneRow
     class:empty
+    draggable={!event.allDay}
     use:tooltip={{ component: EventPresenter, props: { value: event } }}
-    on:click|stopPropagation={() => {
-      if (event) showPanel(view.component.EditDoc, event._id, event._class, 'content')
-    }}
+    on:click|stopPropagation={click}
+    on:dragstart={dragStart}
+    on:drag={drag}
+    on:dragend={drop}
+    on:drop
   >
-    {#if !narrow && !empty}
-      <b class="overflow-label">{event.title}</b>
-    {/if}
-    {#if !oneRow && !empty}
-      <span class="overflow-label text-sm">{getTime(startDate)}-{getTime(endDate)}</span>
+    {#if !empty && presenter?.presenter}
+      <Component is={presenter.presenter} props={{ event, narrow, oneRow }} />
     {/if}
   </div>
 {/if}
 
 <style lang="scss">
   .event-container {
+    pointer-events: auto;
     overflow: hidden;
     display: flex;
     flex-direction: column;
diff --git a/plugins/calendar-resources/src/index.ts b/plugins/calendar-resources/src/index.ts
index 7e2837169e..176b0879b1 100644
--- a/plugins/calendar-resources/src/index.ts
+++ b/plugins/calendar-resources/src/index.ts
@@ -33,11 +33,13 @@ import UpdateRecInstancePopup from './components/UpdateRecInstancePopup.svelte'
 import ReminderViewlet from './components/activity/ReminderViewlet.svelte'
 import CalendarIntegrationIcon from './components/icons/Calendar.svelte'
 import EventElement from './components/EventElement.svelte'
+import CalendarEventPresenter from './components/CalendarEventPresenter.svelte'
+import DayCalendar from './components/DayCalendar.svelte'
 import calendar from './plugin'
 import contact from '@hcengineering/contact'
 import { deleteObjects } from '@hcengineering/view-resources'
 
-export { EventElement, CalendarView }
+export { EventElement, CalendarView, DayCalendar }
 
 async function saveEventReminder (object: Doc): Promise<void> {
   showPopup(SaveEventReminder, { objectId: object._id, objectClass: object._class })
@@ -148,7 +150,8 @@ export default async (): Promise<Resources> => ({
     EventPresenter,
     CreateEvent,
     IntegrationConnect,
-    CalendarIntegrationIcon
+    CalendarIntegrationIcon,
+    CalendarEventPresenter
   },
   activity: {
     ReminderViewlet
diff --git a/plugins/calendar/src/index.ts b/plugins/calendar/src/index.ts
index d2dc4dfdbf..78f8acc4b8 100644
--- a/plugins/calendar/src/index.ts
+++ b/plugins/calendar/src/index.ts
@@ -12,7 +12,7 @@
 // limitations under the License.
 
 import { Contact } from '@hcengineering/contact'
-import type { AttachedDoc, Class, Doc, Markup, Ref, Space, Timestamp } from '@hcengineering/core'
+import type { AttachedDoc, Class, Doc, Markup, Mixin, Ref, Space, Timestamp } from '@hcengineering/core'
 import { NotificationType } from '@hcengineering/notification'
 import type { Asset, IntlString, Metadata, Plugin } from '@hcengineering/platform'
 import { plugin } from '@hcengineering/platform'
@@ -94,6 +94,13 @@ export interface ReccuringInstance extends Event {
   virtual?: boolean
 }
 
+/**
+ * @public
+ */
+export interface CalendarEventPresenter extends Class<Event> {
+  presenter: AnyComponent
+}
+
 /**
  * @public
  */
@@ -109,6 +116,9 @@ const calendarPlugin = plugin(calendarId, {
     ReccuringEvent: '' as Ref<Class<ReccuringEvent>>,
     ReccuringInstance: '' as Ref<Class<ReccuringInstance>>
   },
+  mixin: {
+    CalendarEventPresenter: '' as Ref<Mixin<CalendarEventPresenter>>
+  },
   icon: {
     Calendar: '' as Asset,
     Location: '' as Asset,
diff --git a/plugins/calendar/src/utils.ts b/plugins/calendar/src/utils.ts
index 9c7c67a69f..d553fcd3c6 100644
--- a/plugins/calendar/src/utils.ts
+++ b/plugins/calendar/src/utils.ts
@@ -261,11 +261,7 @@ export function getAllEvents (events: Event[], from: Timestamp, to: Timestamp):
   const recurData: ReccuringInstance[] = []
   const instancesMap: Map<string, ReccuringInstance[]> = new Map()
   for (const event of events) {
-    if (event._class === calendar.class.Event) {
-      if (from > event.dueDate) continue
-      if (event.date > to) continue
-      base.push(event)
-    } else if (event._class === calendar.class.ReccuringEvent) {
+    if (event._class === calendar.class.ReccuringEvent) {
       recur.push(event as ReccuringEvent)
     } else if (event._class === calendar.class.ReccuringInstance) {
       const instance = event as ReccuringInstance
@@ -273,6 +269,10 @@ export function getAllEvents (events: Event[], from: Timestamp, to: Timestamp):
       const arr = instancesMap.get(instance.recurringEventId) ?? []
       arr.push(instance)
       instancesMap.set(instance.recurringEventId, arr)
+    } else {
+      if (from > event.dueDate) continue
+      if (event.date > to) continue
+      base.push(event)
     }
   }
   for (const rec of recur) {