From dfbe8539184810a3201ebfa9a165ce59ec87d277 Mon Sep 17 00:00:00 2001
From: "HOME-LAPTOP\\kshkulev" <kshkulev@gmail.com>
Date: Thu, 13 Nov 2025 10:41:54 +0900
Subject: [PATCH] Reuse base page class

---
 .../Components/Pages/Objects/Houses.razor     | 132 ++---------------
 .../Components/Pages/Registry/Common.razor    | 132 ++---------------
 .../Components/Pages/Registry/Private.razor   | 132 ++---------------
 .../Components/Shared/SyncedPageBase.cs       | 140 ++++++++++++++++++
 4 files changed, 167 insertions(+), 369 deletions(-)
 create mode 100644 Hcs.WebApp/Components/Shared/SyncedPageBase.cs

diff --git a/Hcs.WebApp/Components/Pages/Objects/Houses.razor b/Hcs.WebApp/Components/Pages/Objects/Houses.razor
index 65a0e26..d71e049 100644
--- a/Hcs.WebApp/Components/Pages/Objects/Houses.razor
+++ b/Hcs.WebApp/Components/Pages/Objects/Houses.razor
@@ -1,22 +1,16 @@
 @page "/objects/houses"
 
-@using System.IdentityModel.Claims
-@using Hcs.WebApp.BackgroundServices
 @using Hcs.WebApp.Components.Dialogs
 @using Hcs.WebApp.Services
 @using Microsoft.AspNetCore.Authorization
-@using Microsoft.AspNetCore.Identity
-@using Microsoft.EntityFrameworkCore
+@using System.Security.Claims
 
-@implements IDisposable
+@inherits SyncedPageBase<House>
 
 @attribute [Authorize]
 
-@inject AuthenticationStateProvider AuthenticationStateProvider
-@inject HeadquartersService HeadquartersService
 @inject HouseService HouseService
 @inject DialogService DialogService
-@inject CampaignManagementState CampaignManagementState
 
 <PageTitle>Жилищный фонд</PageTitle>
 
@@ -29,16 +23,13 @@
                 </RadzenColumn>
                 <RadzenColumn Size="12" SizeMD="6">
                     <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" JustifyContent="JustifyContent.End" Gap="0.5rem">
-                        <RadzenButton Icon="sync" Text="@syncText" Disabled="@(state != SyncedPageState.Idle)" Click="@SyncHousesAsync" ButtonStyle="ButtonStyle.Primary" />
+                        <RadzenButton Icon="sync" Text="@syncButtonText" Disabled="@(state != SyncedPageState.Idle)" Click="@SyncDataAsync" ButtonStyle="ButtonStyle.Primary" />
                     </RadzenStack>
                 </RadzenColumn>
             </RadzenRow>
             <RadzenRow>
                 <RadzenColumn SizeMD="12">
-                    <RadzenAlert Visible="@hasError" AlertStyle="AlertStyle.Danger" Variant="Variant.Flat" Shade="Shade.Lighter" AllowClose="false">
-                        @errorMessage
-                    </RadzenAlert>
-                    <RadzenDataGrid TItem="House" Data="@houses" RowExpand="@RowExpandAsync" IsLoading="@(state != SyncedPageState.Idle)" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" ExpandMode="DataGridExpandMode.Single">
+                    <RadzenDataGrid TItem="House" Data="@data" RowExpand="@RowExpandAsync" IsLoading="@(state != SyncedPageState.Idle)" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" ExpandMode="DataGridExpandMode.Single">
                         @* <Template Context="house">
                             <RadzenDataGrid Data="@registry.Elements" AllowFiltering="true" AllowSorting="true">
                                 <Columns>
@@ -64,56 +55,16 @@
 </AuthorizedContent>
 
 @code {
-    SyncedPageState state;
-    IEnumerable<House> houses;
-    string syncText = "...";
-    bool hasError;
-    string errorMessage;
+    protected override Campaign.CampaignType CampaignType => Campaign.CampaignType.ExportHousesData_15_7_0_1;
 
-    protected override async Task OnAfterRenderAsync(bool firstRender)
+    protected override bool HasPermission(ClaimsPrincipal user)
     {
-        await base.OnAfterRenderAsync(firstRender);
-
-        if (firstRender)
-        {
-            ChangeState(SyncedPageState.Init);
-
-            var finalState = SyncedPageState.Idle;
-            var state = await AuthenticationStateProvider.GetAuthenticationStateAsync();
-            if (state.User.IsOperatorOrHigher())
-            {
-                var operationInProgress = await HeadquartersService.HasActiveCampaignAsync(Campaign.CampaignType.ExportHousesData_15_7_0_1);
-                if (operationInProgress)
-                {
-                    finalState = SyncedPageState.SyncWaiting;
-                }
-
-                CampaignManagementState.OnCampaignCreated += OnCampaignCreated;
-                CampaignManagementState.OnCampaignEnded += OnCampaignEnded;
-
-                houses = await HouseService.GetAllHousesAsync();
-            }
-
-            ChangeState(finalState);
-        }
+        return user.IsOperatorOrHigher();
     }
 
-    async Task SyncHousesAsync()
+    protected override Task<IEnumerable<House>> GetDataAsync()
     {
-        if (state == SyncedPageState.SyncWaiting) return;
-
-        ChangeState(SyncedPageState.SyncWaiting);
-
-        if (await HeadquartersService.HasActiveCampaignAsync(Campaign.CampaignType.ExportHousesData_15_7_0_1))
-        {
-            ChangeState(SyncedPageState.Idle);
-        }
-        else
-        {
-            // TODO: Use user id
-            var campaign = await HeadquartersService.InitiateCampaignAsync(Campaign.CampaignType.ExportHousesData_15_7_0_1, "");
-            CampaignManagementState.EnqueueCampaign(campaign);
-        }
+        return HouseService.GetAllHousesAsync();
     }
 
     async Task RowExpandAsync(House house)
@@ -135,69 +86,4 @@
         //         Height = "600px"
         //     });
     }
-
-    void ChangeState(SyncedPageState state)
-    {
-        if (this.state == state) return;
-
-        this.state = state;
-
-        SetSyncText();
-        StateHasChanged();
-    }
-
-    void SetSyncText()
-    {
-        switch (state)
-        {
-            case SyncedPageState.Init:
-                syncText = "...";
-                break;
-
-            case SyncedPageState.Loading:
-            case SyncedPageState.Idle:
-                syncText = "Синхронизировать";
-                break;
-
-            case SyncedPageState.SyncWaiting:
-                syncText = "Идет синхронизация...";
-                break;
-        }
-    }
-
-    void OnCampaignCreated(Campaign campaign)
-    {
-        if (campaign.Type == Campaign.CampaignType.ExportHousesData_15_7_0_1)
-        {
-            InvokeAsync(() => ChangeState(SyncedPageState.SyncWaiting));
-        }
-    }
-
-    void OnCampaignEnded(int campaignId, Campaign.CampaignType type, DateTime endedAt, string failureReason)
-    {
-        if (type == Campaign.CampaignType.ExportHousesData_15_7_0_1)
-        {
-            Task.Run(RefreshHouses);
-        }
-    }
-
-    async Task RefreshHouses()
-    {
-        await InvokeAsync(() => ChangeState(SyncedPageState.Loading));
-
-        var refreshedHouses = await HouseService.GetAllHousesAsync();
-
-        await InvokeAsync(() =>
-        {
-            houses = refreshedHouses;
-
-            ChangeState(SyncedPageState.Idle);
-        });
-    }
-
-    public void Dispose()
-    {
-        CampaignManagementState.OnCampaignCreated -= OnCampaignCreated;
-        CampaignManagementState.OnCampaignEnded -= OnCampaignEnded;
-    }
 }
diff --git a/Hcs.WebApp/Components/Pages/Registry/Common.razor b/Hcs.WebApp/Components/Pages/Registry/Common.razor
index 469cd60..a139cae 100644
--- a/Hcs.WebApp/Components/Pages/Registry/Common.razor
+++ b/Hcs.WebApp/Components/Pages/Registry/Common.razor
@@ -1,22 +1,16 @@
 @page "/registry/common"
 
-@using System.IdentityModel.Claims
-@using Hcs.WebApp.BackgroundServices
 @using Hcs.WebApp.Components.Dialogs
 @using Hcs.WebApp.Services
 @using Microsoft.AspNetCore.Authorization
-@using Microsoft.AspNetCore.Identity
-@using Microsoft.EntityFrameworkCore
+@using System.Security.Claims
 
-@implements IDisposable
+@inherits SyncedPageBase<Registry>
 
 @attribute [Authorize]
 
-@inject AuthenticationStateProvider AuthenticationStateProvider
-@inject HeadquartersService HeadquartersService
 @inject RegistryService RegistryService
 @inject DialogService DialogService
-@inject CampaignManagementState CampaignManagementState
 
 <PageTitle>Общие справочники подсистемы НСИ</PageTitle>
 
@@ -29,16 +23,13 @@
                 </RadzenColumn>
                 <RadzenColumn Size="12" SizeMD="6">
                     <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" JustifyContent="JustifyContent.End" Gap="0.5rem">
-                        <RadzenButton Icon="sync" Text="@syncText" Disabled="@(state != SyncedPageState.Idle)" Click="@SyncRegistriesAsync" ButtonStyle="ButtonStyle.Primary" />
+                        <RadzenButton Icon="sync" Text="@syncButtonText" Disabled="@(state != SyncedPageState.Idle)" Click="@SyncDataAsync" ButtonStyle="ButtonStyle.Primary" />
                     </RadzenStack>
                 </RadzenColumn>
             </RadzenRow>
             <RadzenRow>
                 <RadzenColumn SizeMD="12">
-                    <RadzenAlert Visible="@hasError" AlertStyle="AlertStyle.Danger" Variant="Variant.Flat" Shade="Shade.Lighter" AllowClose="false">
-                        @errorMessage
-                    </RadzenAlert>
-                    <RadzenDataGrid TItem="Registry" Data="@registries" RowExpand="@RowExpandAsync" IsLoading="@(state != SyncedPageState.Idle)" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" ExpandMode="DataGridExpandMode.Single">
+                    <RadzenDataGrid TItem="Registry" Data="@data" RowExpand="@RowExpandAsync" IsLoading="@(state != SyncedPageState.Idle)" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" ExpandMode="DataGridExpandMode.Single">
                         <Template Context="registry">
                             <RadzenDataGrid Data="@registry.Elements" AllowFiltering="true" AllowSorting="true">
                                 <Columns>
@@ -64,56 +55,16 @@
 </AuthorizedContent>
 
 @code {
-    SyncedPageState state;
-    IEnumerable<Registry> registries;
-    string syncText = "...";
-    bool hasError;
-    string errorMessage;
+    protected override Campaign.CampaignType CampaignType => Campaign.CampaignType.ExportCommonRegistryElements_15_7_0_1;
 
-    protected override async Task OnAfterRenderAsync(bool firstRender)
+    protected override bool HasPermission(ClaimsPrincipal user)
     {
-        await base.OnAfterRenderAsync(firstRender);
-
-        if (firstRender)
-        {
-            ChangeState(SyncedPageState.Init);
-
-            var finalState = SyncedPageState.Idle;
-            var state = await AuthenticationStateProvider.GetAuthenticationStateAsync();
-            if (state.User.IsOperatorOrHigher())
-            {
-                var operationInProgress = await HeadquartersService.HasActiveCampaignAsync(Campaign.CampaignType.ExportCommonRegistryElements_15_7_0_1);
-                if (operationInProgress)
-                {
-                    finalState = SyncedPageState.SyncWaiting;
-                }
-
-                CampaignManagementState.OnCampaignCreated += OnCampaignCreated;
-                CampaignManagementState.OnCampaignEnded += OnCampaignEnded;
-
-                registries = await RegistryService.GetAllRegistriesAsync(true);
-            }
-
-            ChangeState(finalState);
-        }
+        return user.IsOperatorOrHigher();
     }
 
-    async Task SyncRegistriesAsync()
+    protected override Task<IEnumerable<Registry>> GetDataAsync()
     {
-        if (state == SyncedPageState.SyncWaiting) return;
-
-        ChangeState(SyncedPageState.SyncWaiting);
-
-        if (await HeadquartersService.HasActiveCampaignAsync(Campaign.CampaignType.ExportCommonRegistryElements_15_7_0_1))
-        {
-            ChangeState(SyncedPageState.Idle);
-        }
-        else
-        {
-            // TODO: Use user id
-            var campaign = await HeadquartersService.InitiateCampaignAsync(Campaign.CampaignType.ExportCommonRegistryElements_15_7_0_1, "");
-            CampaignManagementState.EnqueueCampaign(campaign);
-        }
+        return RegistryService.GetAllRegistriesAsync(true);
     }
 
     async Task RowExpandAsync(Registry registry)
@@ -138,69 +89,4 @@
                 Height = "600px"
             });
     }
-
-    void ChangeState(SyncedPageState state)
-    {
-        if (this.state == state) return;
-
-        this.state = state;
-
-        SetSyncText();
-        StateHasChanged();
-    }
-
-    void SetSyncText()
-    {
-        switch (state)
-        {
-            case SyncedPageState.Init:
-                syncText = "...";
-                break;
-
-            case SyncedPageState.Loading:
-            case SyncedPageState.Idle:
-                syncText = "Синхронизировать";
-                break;
-
-            case SyncedPageState.SyncWaiting:
-                syncText = "Идет синхронизация...";
-                break;
-        }
-    }
-
-    void OnCampaignCreated(Campaign campaign)
-    {
-        if (campaign.Type == Campaign.CampaignType.ExportCommonRegistryElements_15_7_0_1)
-        {
-            InvokeAsync(() => ChangeState(SyncedPageState.SyncWaiting));
-        }
-    }
-
-    void OnCampaignEnded(int campaignId, Campaign.CampaignType type, DateTime endedAt, string failureReason)
-    {
-        if (type == Campaign.CampaignType.ExportCommonRegistryElements_15_7_0_1)
-        {
-            Task.Run(RefreshRegistries);
-        }
-    }
-
-    async Task RefreshRegistries()
-    {
-        await InvokeAsync(() => ChangeState(SyncedPageState.Loading));
-
-        var refreshedRegistries = await RegistryService.GetAllRegistriesAsync(true);
-
-        await InvokeAsync(() =>
-        {
-            registries = refreshedRegistries;
-
-            ChangeState(SyncedPageState.Idle);
-        });
-    }
-
-    public void Dispose()
-    {
-        CampaignManagementState.OnCampaignCreated -= OnCampaignCreated;
-        CampaignManagementState.OnCampaignEnded -= OnCampaignEnded;
-    }
 }
diff --git a/Hcs.WebApp/Components/Pages/Registry/Private.razor b/Hcs.WebApp/Components/Pages/Registry/Private.razor
index 32fe7a4..bd62c0c 100644
--- a/Hcs.WebApp/Components/Pages/Registry/Private.razor
+++ b/Hcs.WebApp/Components/Pages/Registry/Private.razor
@@ -1,22 +1,16 @@
 @page "/registry/private"
 
-@using System.IdentityModel.Claims
-@using Hcs.WebApp.BackgroundServices
 @using Hcs.WebApp.Components.Dialogs
 @using Hcs.WebApp.Services
 @using Microsoft.AspNetCore.Authorization
-@using Microsoft.AspNetCore.Identity
-@using Microsoft.EntityFrameworkCore
+@using System.Security.Claims
 
-@implements IDisposable
+@inherits SyncedPageBase<Registry>
 
 @attribute [Authorize]
 
-@inject AuthenticationStateProvider AuthenticationStateProvider
-@inject HeadquartersService HeadquartersService
 @inject RegistryService RegistryService
 @inject DialogService DialogService
-@inject CampaignManagementState CampaignManagementState
 
 <PageTitle>Частные справочники подсистемы НСИ</PageTitle>
 
@@ -29,16 +23,13 @@
                 </RadzenColumn>
                 <RadzenColumn Size="12" SizeMD="6">
                     <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" JustifyContent="JustifyContent.End" Gap="0.5rem">
-                        <RadzenButton Icon="sync" Text="@syncText" Disabled="@(state != SyncedPageState.Idle)" Click="@SyncRegistriesAsync" ButtonStyle="ButtonStyle.Primary" />
+                        <RadzenButton Icon="sync" Text="@syncButtonText" Disabled="@(state != SyncedPageState.Idle)" Click="@SyncDataAsync" ButtonStyle="ButtonStyle.Primary" />
                     </RadzenStack>
                 </RadzenColumn>
             </RadzenRow>
             <RadzenRow>
                 <RadzenColumn SizeMD="12">
-                    <RadzenAlert Visible="@hasError" AlertStyle="AlertStyle.Danger" Variant="Variant.Flat" Shade="Shade.Lighter" AllowClose="false">
-                        @errorMessage
-                    </RadzenAlert>
-                    <RadzenDataGrid TItem="Registry" Data="@registries" RowExpand="@RowExpandAsync" IsLoading="@(state != SyncedPageState.Idle)" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" ExpandMode="DataGridExpandMode.Single">
+                    <RadzenDataGrid TItem="Registry" Data="@data" RowExpand="@RowExpandAsync" IsLoading="@(state != SyncedPageState.Idle)" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" ExpandMode="DataGridExpandMode.Single">
                         <Template Context="registry">
                             <RadzenDataGrid Data="@registry.Elements" AllowFiltering="true" AllowSorting="true">
                                 <Columns>
@@ -64,56 +55,16 @@
 </AuthorizedContent>
 
 @code {
-    IEnumerable<Registry> registries;
-    SyncedPageState state;
-    string syncText = "...";
-    bool hasError;
-    string errorMessage;
+    protected override Campaign.CampaignType CampaignType => Campaign.CampaignType.ExportPrivateRegistryElements_15_7_0_1;
 
-    protected override async Task OnAfterRenderAsync(bool firstRender)
+    protected override bool HasPermission(ClaimsPrincipal user)
     {
-        await base.OnAfterRenderAsync(firstRender);
-
-        if (firstRender)
-        {
-            ChangeState(SyncedPageState.Init);
-
-            var finalState = SyncedPageState.Idle;
-            var state = await AuthenticationStateProvider.GetAuthenticationStateAsync();
-            if (state.User.IsOperatorOrHigher())
-            {
-                var operationInProgress = await HeadquartersService.HasActiveCampaignAsync(Campaign.CampaignType.ExportPrivateRegistryElements_15_7_0_1);
-                if (operationInProgress)
-                {
-                    finalState = SyncedPageState.SyncWaiting;
-                }
-
-                CampaignManagementState.OnCampaignCreated += OnCampaignCreated;
-                CampaignManagementState.OnCampaignEnded += OnCampaignEnded;
-
-                registries = await RegistryService.GetAllRegistriesAsync(false);
-            }
-
-            ChangeState(finalState);
-        }
+        return user.IsOperatorOrHigher();
     }
 
-    async Task SyncRegistriesAsync()
+    protected override Task<IEnumerable<Registry>> GetDataAsync()
     {
-        if (state == SyncedPageState.SyncWaiting) return;
-
-        ChangeState(SyncedPageState.SyncWaiting);
-
-        if (await HeadquartersService.HasActiveCampaignAsync(Campaign.CampaignType.ExportPrivateRegistryElements_15_7_0_1))
-        {
-            ChangeState(SyncedPageState.Idle);
-        }
-        else
-        {
-            // TODO: Use user id
-            var campaign = await HeadquartersService.InitiateCampaignAsync(Campaign.CampaignType.ExportPrivateRegistryElements_15_7_0_1, "");
-            CampaignManagementState.EnqueueCampaign(campaign);
-        }
+        return RegistryService.GetAllRegistriesAsync(false);
     }
 
     async Task RowExpandAsync(Registry registry)
@@ -138,69 +89,4 @@
                 Height = "600px"
             });
     }
-
-    void ChangeState(SyncedPageState state)
-    {
-        if (this.state == state) return;
-
-        this.state = state;
-
-        SetSyncText();
-        StateHasChanged();
-    }
-
-    void SetSyncText()
-    {
-        switch (state)
-        {
-            case SyncedPageState.Init:
-                syncText = "...";
-                break;
-
-            case SyncedPageState.Loading:
-            case SyncedPageState.Idle:
-                syncText = "Синхронизировать";
-                break;
-
-            case SyncedPageState.SyncWaiting:
-                syncText = "Идет синхронизация...";
-                break;
-        }
-    }
-
-    void OnCampaignCreated(Campaign campaign)
-    {
-        if (campaign.Type == Campaign.CampaignType.ExportPrivateRegistryElements_15_7_0_1)
-        {
-            InvokeAsync(() => ChangeState(SyncedPageState.SyncWaiting));
-        }
-    }
-
-    void OnCampaignEnded(int campaignId, Campaign.CampaignType type, DateTime endedAt, string failureReason)
-    {
-        if (type == Campaign.CampaignType.ExportPrivateRegistryElements_15_7_0_1)
-        {
-            Task.Run(RefreshRegistries);
-        }
-    }
-
-    async Task RefreshRegistries()
-    {
-        await InvokeAsync(() => ChangeState(SyncedPageState.Loading));
-
-        var refreshedRegistries = await RegistryService.GetAllRegistriesAsync(false);
-
-        await InvokeAsync(() =>
-        {
-            registries = refreshedRegistries;
-
-            ChangeState(SyncedPageState.Idle);
-        });
-    }
-
-    public void Dispose()
-    {
-        CampaignManagementState.OnCampaignCreated -= OnCampaignCreated;
-        CampaignManagementState.OnCampaignEnded -= OnCampaignEnded;
-    }
 }
diff --git a/Hcs.WebApp/Components/Shared/SyncedPageBase.cs b/Hcs.WebApp/Components/Shared/SyncedPageBase.cs
new file mode 100644
index 0000000..05ffd88
--- /dev/null
+++ b/Hcs.WebApp/Components/Shared/SyncedPageBase.cs
@@ -0,0 +1,140 @@
+using Hcs.WebApp.BackgroundServices;
+using Hcs.WebApp.Data.Hcs;
+using Hcs.WebApp.Services;
+using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Authorization;
+using System.Security.Claims;
+
+namespace Hcs.WebApp.Components.Shared
+{
+    public abstract class SyncedPageBase<TData> : ComponentBase, IDisposable
+    {
+        protected SyncedPageState state;
+        protected IEnumerable<TData> data;
+        protected string syncButtonText = "...";
+
+        protected abstract Campaign.CampaignType CampaignType { get; }
+
+        [Inject]
+        private AuthenticationStateProvider AuthenticationStateProvider { get; set; }
+
+        [Inject]
+        private HeadquartersService HeadquartersService { get; set; }
+
+        [Inject]
+        private CampaignManagementState CampaignManagementState { get; set; }
+
+        protected override async Task OnAfterRenderAsync(bool firstRender)
+        {
+            if (firstRender)
+            {
+                ChangeState(SyncedPageState.Init);
+
+                var finalState = SyncedPageState.Idle;
+                var state = await AuthenticationStateProvider.GetAuthenticationStateAsync();
+                if (HasPermission(state.User))
+                {
+                    var operationInProgress = await HeadquartersService.HasActiveCampaignAsync(CampaignType);
+                    if (operationInProgress)
+                    {
+                        finalState = SyncedPageState.SyncWaiting;
+                    }
+
+                    CampaignManagementState.OnCampaignCreated += OnCampaignCreated;
+                    CampaignManagementState.OnCampaignEnded += OnCampaignEnded;
+
+                    data = await GetDataAsync();
+                }
+
+                ChangeState(finalState);
+            }
+        }
+
+        public void Dispose()
+        {
+            CampaignManagementState.OnCampaignCreated -= OnCampaignCreated;
+            CampaignManagementState.OnCampaignEnded -= OnCampaignEnded;
+        }
+
+        protected abstract bool HasPermission(ClaimsPrincipal user);
+
+        protected abstract Task<IEnumerable<TData>> GetDataAsync();
+
+        protected async Task SyncDataAsync()
+        {
+            if (state == SyncedPageState.SyncWaiting) return;
+
+            ChangeState(SyncedPageState.SyncWaiting);
+
+            if (await HeadquartersService.HasActiveCampaignAsync(CampaignType))
+            {
+                ChangeState(SyncedPageState.Idle);
+            }
+            else
+            {
+                // TODO: Use user id
+                var campaign = await HeadquartersService.InitiateCampaignAsync(CampaignType, "");
+                CampaignManagementState.EnqueueCampaign(campaign);
+            }
+        }
+
+        private void ChangeState(SyncedPageState state)
+        {
+            if (this.state == state) return;
+
+            this.state = state;
+
+            SetSyncButtonText();
+            StateHasChanged();
+        }
+
+        private void SetSyncButtonText()
+        {
+            switch (state)
+            {
+                case SyncedPageState.Init:
+                    syncButtonText = "...";
+                    break;
+
+                case SyncedPageState.Loading:
+                case SyncedPageState.Idle:
+                    syncButtonText = "Синхронизировать";
+                    break;
+
+                case SyncedPageState.SyncWaiting:
+                    syncButtonText = "Идет синхронизация...";
+                    break;
+            }
+        }
+
+        private void OnCampaignCreated(Campaign campaign)
+        {
+            if (campaign.Type == CampaignType)
+            {
+                InvokeAsync(() => ChangeState(SyncedPageState.SyncWaiting));
+            }
+        }
+
+        private void OnCampaignEnded(int campaignId, Campaign.CampaignType type, DateTime endedAt, string failureReason)
+        {
+            if (type == CampaignType)
+            {
+                Task.Run(RefreshData);
+            }
+        }
+
+        private async Task RefreshData()
+        {
+            await InvokeAsync(() => ChangeState(SyncedPageState.Loading));
+
+            var refreshedData = await GetDataAsync();
+
+            await InvokeAsync(() =>
+            {
+                data = refreshedData;
+
+                ChangeState(SyncedPageState.Idle);
+            });
+        }
+    }
+}