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ContentQueryService.cs
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ContentQueryService.cs
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// ==========================================================================
// Squidex Headless CMS
// ==========================================================================
// Copyright (c) Squidex UG (haftungsbeschränkt)
// All rights reserved. Licensed under the MIT license.
// ==========================================================================
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Threading.Tasks;
using Microsoft.Extensions.Options;
using Microsoft.OData;
using Squidex.Domain.Apps.Core.Contents;
using Squidex.Domain.Apps.Core.ConvertContent;
using Squidex.Domain.Apps.Core.Scripting;
using Squidex.Domain.Apps.Entities.Contents.Edm;
using Squidex.Domain.Apps.Entities.Contents.Repositories;
using Squidex.Domain.Apps.Entities.Schemas;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Log;
using Squidex.Infrastructure.Queries;
using Squidex.Infrastructure.Queries.OData;
using Squidex.Infrastructure.Reflection;
using Squidex.Shared;
using Squidex.Shared.Identity;
#pragma warning disable RECS0147
namespace Squidex.Domain.Apps.Entities.Contents
{
public sealed class ContentQueryService : IContentQueryService
{
private static readonly Status[] StatusAll = { Status.Archived, Status.Draft, Status.Published };
private static readonly Status[] StatusArchived = { Status.Archived };
private static readonly Status[] StatusPublished = { Status.Published };
private static readonly Status[] StatusDraftOrPublished = { Status.Draft, Status.Published };
private readonly IContentRepository contentRepository;
private readonly IContentVersionLoader contentVersionLoader;
private readonly IAppProvider appProvider;
private readonly IAssetUrlGenerator assetUrlGenerator;
private readonly IScriptEngine scriptEngine;
private readonly ContentOptions options;
private readonly EdmModelBuilder modelBuilder;
public ContentQueryService(
IAppProvider appProvider,
IAssetUrlGenerator assetUrlGenerator,
IContentRepository contentRepository,
IContentVersionLoader contentVersionLoader,
IScriptEngine scriptEngine,
IOptions<ContentOptions> options,
EdmModelBuilder modelBuilder)
{
Guard.NotNull(appProvider, nameof(appProvider));
Guard.NotNull(assetUrlGenerator, nameof(assetUrlGenerator));
Guard.NotNull(contentRepository, nameof(contentRepository));
Guard.NotNull(contentVersionLoader, nameof(contentVersionLoader));
Guard.NotNull(modelBuilder, nameof(modelBuilder));
Guard.NotNull(options, nameof(options));
Guard.NotNull(scriptEngine, nameof(scriptEngine));
this.appProvider = appProvider;
this.assetUrlGenerator = assetUrlGenerator;
this.contentRepository = contentRepository;
this.contentVersionLoader = contentVersionLoader;
this.modelBuilder = modelBuilder;
this.options = options.Value;
this.scriptEngine = scriptEngine;
}
public Task ThrowIfSchemaNotExistsAsync(QueryContext context, string schemaIdOrName)
{
return GetSchemaAsync(context, schemaIdOrName);
}
public async Task<IContentEntity> FindContentAsync(QueryContext context, string schemaIdOrName, Guid id, long version = -1)
{
Guard.NotNull(context, nameof(context));
var schema = await GetSchemaAsync(context, schemaIdOrName);
CheckPermission(schema, context.User);
using (Profiler.TraceMethod<ContentQueryService>())
{
var isVersioned = version > EtagVersion.Empty;
var status = GetFindStatus(context);
var content =
isVersioned ?
await FindContentByVersionAsync(id, version) :
await FindContentAsync(context, id, status, schema);
if (content == null || (content.Status != Status.Published && !context.IsFrontendClient) || content.SchemaId.Id != schema.Id)
{
throw new DomainObjectNotFoundException(id.ToString(), typeof(IContentEntity));
}
return Transform(context, schema, true, content);
}
}
public async Task<IResultList<IContentEntity>> QueryAsync(QueryContext context, string schemaIdOrName, Q query)
{
Guard.NotNull(context, nameof(context));
var schema = await GetSchemaAsync(context, schemaIdOrName);
CheckPermission(schema, context.User);
using (Profiler.TraceMethod<ContentQueryService>())
{
var status = GetQueryStatus(context);
IResultList<IContentEntity> contents;
if (query.Ids?.Count > 0)
{
contents = await contentRepository.QueryAsync(context.App, schema, status, new HashSet<Guid>(query.Ids));
contents = Sort(contents, query.Ids);
}
else
{
var parsedQuery = ParseQuery(context, query.ODataQuery, schema);
contents = await contentRepository.QueryAsync(context.App, schema, status, parsedQuery);
}
return Transform(context, schema, true, contents);
}
}
private IContentEntity Transform(QueryContext context, ISchemaEntity schema, bool checkType, IContentEntity content)
{
return TransformCore(context, schema, checkType, Enumerable.Repeat(content, 1)).FirstOrDefault();
}
private IResultList<IContentEntity> Transform(QueryContext context, ISchemaEntity schema, bool checkType, IResultList<IContentEntity> contents)
{
var transformed = TransformCore(context, schema, checkType, contents);
return ResultList.Create(contents.Total, transformed);
}
private static IResultList<IContentEntity> Sort(IResultList<IContentEntity> contents, IReadOnlyList<Guid> ids)
{
var sorted = ids.Select(id => contents.FirstOrDefault(x => x.Id == id)).Where(x => x != null);
return ResultList.Create(contents.Total, sorted);
}
private IEnumerable<IContentEntity> TransformCore(QueryContext context, ISchemaEntity schema, bool checkType, IEnumerable<IContentEntity> contents)
{
using (Profiler.TraceMethod<ContentQueryService>())
{
var converters = GenerateConverters(context, checkType).ToArray();
var scriptText = schema.ScriptQuery;
var isScripting = !string.IsNullOrWhiteSpace(scriptText);
foreach (var content in contents)
{
var result = SimpleMapper.Map(content, new ContentEntity());
if (result.Data != null)
{
if (!context.IsFrontendClient && isScripting)
{
result.Data = scriptEngine.Transform(new ScriptContext { User = context.User, Data = content.Data, ContentId = content.Id }, scriptText);
}
result.Data = result.Data.ConvertName2Name(schema.SchemaDef, converters);
}
if (result.DataDraft != null)
{
result.DataDraft = result.DataDraft.ConvertName2Name(schema.SchemaDef, converters);
}
yield return result;
}
}
}
private IEnumerable<FieldConverter> GenerateConverters(QueryContext context, bool checkType)
{
if (!context.IsFrontendClient)
{
yield return FieldConverters.ExcludeHidden();
yield return FieldConverters.ForNestedName2Name(ValueConverters.ExcludeHidden());
}
if (checkType)
{
yield return FieldConverters.ExcludeChangedTypes();
yield return FieldConverters.ForNestedName2Name(ValueConverters.ExcludeChangedTypes());
}
yield return FieldConverters.ResolveInvariant(context.App.LanguagesConfig);
yield return FieldConverters.ResolveLanguages(context.App.LanguagesConfig);
if (!context.IsFrontendClient)
{
yield return FieldConverters.ResolveFallbackLanguages(context.App.LanguagesConfig);
if (context.Languages?.Any() == true)
{
yield return FieldConverters.FilterLanguages(context.App.LanguagesConfig, context.Languages);
}
if (context.AssetUrlsToResolve?.Any() == true)
{
yield return FieldConverters.ResolveAssetUrls(context.AssetUrlsToResolve, assetUrlGenerator);
}
}
}
private Query ParseQuery(QueryContext context, string query, ISchemaEntity schema)
{
using (Profiler.TraceMethod<ContentQueryService>())
{
try
{
var model = modelBuilder.BuildEdmModel(schema, context.App);
var result = model.ParseQuery(query).ToQuery();
if (result.Sort.Count == 0)
{
result.Sort.Add(new SortNode(new List<string> { "lastModified" }, SortOrder.Descending));
}
if (result.Take > options.MaxResults)
{
result.Take = options.MaxResults;
}
return result;
}
catch (NotSupportedException)
{
throw new ValidationException("OData operation is not supported.");
}
catch (ODataException ex)
{
throw new ValidationException($"Failed to parse query: {ex.Message}", ex);
}
}
}
public async Task<ISchemaEntity> GetSchemaAsync(QueryContext context, string schemaIdOrName)
{
ISchemaEntity schema = null;
if (Guid.TryParse(schemaIdOrName, out var id))
{
schema = await appProvider.GetSchemaAsync(context.App.Id, id);
}
if (schema == null)
{
schema = await appProvider.GetSchemaAsync(context.App.Id, schemaIdOrName);
}
if (schema == null)
{
throw new DomainObjectNotFoundException(schemaIdOrName, typeof(ISchemaEntity));
}
return schema;
}
private static void CheckPermission(ISchemaEntity schema, ClaimsPrincipal user)
{
var permissions = user.Permissions();
var permission = Permissions.ForApp(Permissions.AppContentsRead, schema.AppId.Name, schema.Name);
if (!permissions.Allows(permission))
{
throw new DomainForbiddenException("You do not have permission for this schema.");
}
}
private static Status[] GetFindStatus(QueryContext context)
{
if (context.IsFrontendClient)
{
return StatusAll;
}
else if (context.Unpublished)
{
return StatusDraftOrPublished;
}
else
{
return StatusPublished;
}
}
private static Status[] GetQueryStatus(QueryContext context)
{
if (context.IsFrontendClient)
{
if (context.Archived)
{
return StatusArchived;
}
else
{
return StatusDraftOrPublished;
}
}
else
{
if (context.Unpublished)
{
return StatusDraftOrPublished;
}
else
{
return StatusPublished;
}
}
}
private Task<IContentEntity> FindContentByVersionAsync(Guid id, long version)
{
return contentVersionLoader.LoadAsync(id, version);
}
private Task<IContentEntity> FindContentAsync(QueryContext context, Guid id, Status[] status, ISchemaEntity schema)
{
return contentRepository.FindContentAsync(context.App, schema, status, id);
}
}
}