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GH-78: Extract building of request messages into a request builder
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131 changes: 131 additions & 0 deletions
131
Source/Lib/TraktApiSharp/Requests/Handler/RequestBuilder.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| namespace TraktApiSharp.Requests.Handler | ||
| { | ||
| using Base; | ||
| using Exceptions; | ||
| using Interfaces; | ||
| using Interfaces.Base; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Net.Http.Headers; | ||
| using UriTemplates; | ||
|
|
||
| internal sealed class RequestBuilder | ||
| { | ||
| private const string AUTHENTICATION_SCHEME = "Bearer"; | ||
|
|
||
| private IRequest _request; | ||
| private IRequestBody _requestBody; | ||
| private readonly TraktClient _client; | ||
|
|
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| internal RequestBuilder(TraktClient client) | ||
| { | ||
| _client = client ?? throw new ArgumentNullException(nameof(client)); | ||
| } | ||
|
|
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| internal RequestBuilder(IRequest request, TraktClient client) : this(client) | ||
| { | ||
| _request = request; | ||
| } | ||
|
|
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| internal RequestBuilder WithRequestBody(IRequestBody requestBody) | ||
| { | ||
| _requestBody = requestBody; | ||
| return this; | ||
| } | ||
|
|
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| internal RequestBuilder Reset(IRequest request) | ||
| { | ||
| _request = request; | ||
| _requestBody = null; | ||
| return this; | ||
| } | ||
|
|
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| internal ExtendedHttpRequestMessage Build() | ||
| { | ||
| ExtendedHttpRequestMessage requestMessage = CreateRequestMessage(); | ||
| AddRequestBodyContent(requestMessage); | ||
| SetRequestMessageHeadersForAuthorization(requestMessage); | ||
| return requestMessage; | ||
| } | ||
|
|
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| private ExtendedHttpRequestMessage CreateRequestMessage() | ||
| { | ||
| if (_request == null) | ||
| throw new ArgumentNullException(nameof(_request)); | ||
|
|
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| const string seasonKey = "season"; | ||
| const string episodeKey = "episode"; | ||
|
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| string url = BuildUrl(); | ||
| var requestMessage = new ExtendedHttpRequestMessage(_request.Method, url) { Url = url }; | ||
|
|
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| if (_request is IHasId) | ||
| { | ||
| var idRequest = _request as IHasId; | ||
|
|
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| requestMessage.ObjectId = idRequest?.Id; | ||
| requestMessage.RequestObjectType = idRequest?.RequestObjectType; | ||
| } | ||
|
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| IDictionary<string, object> parameters = _request.GetUriPathParameters(); | ||
|
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| if (parameters.Count != 0) | ||
| { | ||
| if (parameters.ContainsKey(seasonKey)) | ||
| { | ||
| var strSeasonNumber = (string)parameters[seasonKey]; | ||
|
|
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| if (uint.TryParse(strSeasonNumber, out uint seasonNumber)) | ||
| requestMessage.SeasonNumber = seasonNumber; | ||
| } | ||
|
|
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| if (parameters.ContainsKey(episodeKey)) | ||
| { | ||
| var strEpisodeNumber = (string)parameters[episodeKey]; | ||
|
|
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| if (uint.TryParse(strEpisodeNumber, out uint episodeNumber)) | ||
| requestMessage.EpisodeNumber = episodeNumber; | ||
| } | ||
| } | ||
|
|
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| return requestMessage; | ||
| } | ||
|
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| private string BuildUrl() | ||
| { | ||
| var uriTemplate = new UriTemplate(_request.UriTemplate); | ||
| IDictionary<string, object> requestUriParameters = _request.GetUriPathParameters(); | ||
|
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| foreach (KeyValuePair<string, object> parameter in requestUriParameters) | ||
| uriTemplate.AddParameterFromKeyValuePair(parameter.Key, parameter.Value); | ||
|
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| string uri = uriTemplate.Resolve(); | ||
| return $"{_client.Configuration.BaseUrl}{uri}"; | ||
| } | ||
|
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| private void AddRequestBodyContent(ExtendedHttpRequestMessage requestMessage) | ||
| { | ||
| if (_requestBody != null) | ||
| { | ||
| requestMessage.Content = _requestBody.ToHttpContent(); | ||
| requestMessage.RequestBodyJson = _requestBody.HttpContentAsString; | ||
| } | ||
| } | ||
|
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| private void SetRequestMessageHeadersForAuthorization(ExtendedHttpRequestMessage requestMessage) | ||
| { | ||
| AuthorizationRequirement authorizationRequirement = _request.AuthorizationRequirement; | ||
|
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| if (authorizationRequirement == AuthorizationRequirement.Required) | ||
| { | ||
| if (!_client.Authentication.IsAuthorized) | ||
| throw new TraktAuthorizationException("authorization is required for this request, but the current authorization parameters are invalid"); | ||
|
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| requestMessage.Headers.Authorization = new AuthenticationHeaderValue(AUTHENTICATION_SCHEME, _client.Authentication.Authorization.AccessToken); | ||
| } | ||
|
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| if (authorizationRequirement == AuthorizationRequirement.Optional && _client.Configuration.ForceAuthorization && _client.Authentication.IsAuthorized) | ||
| requestMessage.Headers.Authorization = new AuthenticationHeaderValue(AUTHENTICATION_SCHEME, _client.Authentication.Authorization.AccessToken); | ||
| } | ||
| } | ||
| } |
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