From b41c00c4c450bbae4f48447db1bcc67697e78e48 Mon Sep 17 00:00:00 2001
From: Brendan Forster <brendan@github.com>
Date: Sun, 14 Feb 2016 18:04:28 +1100
Subject: [PATCH] extracted pagination function to separate type

---
 Octokit.Reactive/Octokit.Reactive-Mono.csproj |  5 +-
 .../Octokit.Reactive-MonoAndroid.csproj       |  5 +-
 .../Octokit.Reactive-Monotouch.csproj         |  5 +-
 Octokit.Reactive/Octokit.Reactive.csproj      |  3 +
 Octokit/Helpers/Pagination.cs                 | 76 +++++++++++++++++++
 Octokit/Octokit-Mono.csproj                   |  1 +
 Octokit/Octokit-MonoAndroid.csproj            |  1 +
 Octokit/Octokit-Monotouch.csproj              |  1 +
 Octokit/Octokit-Portable.csproj               |  1 +
 Octokit/Octokit-netcore45.csproj              |  1 +
 Octokit/Octokit.csproj                        |  3 +-
 11 files changed, 98 insertions(+), 4 deletions(-)
 create mode 100644 Octokit/Helpers/Pagination.cs

diff --git a/Octokit.Reactive/Octokit.Reactive-Mono.csproj b/Octokit.Reactive/Octokit.Reactive-Mono.csproj
index 10d63457..80fd88f2 100644
--- a/Octokit.Reactive/Octokit.Reactive-Mono.csproj
+++ b/Octokit.Reactive/Octokit.Reactive-Mono.csproj
@@ -52,6 +52,9 @@
     <Compile Include="..\Octokit\Helpers\Ensure.cs">
       <Link>Helpers\Ensure.cs</Link>
     </Compile>
+    <Compile Include="..\Octokit\Helpers\Pagination.cs">
+      <Link>Helpers\Pagination.cs</Link>
+    </Compile>
     <Compile Include="..\SolutionInfo.cs">
       <Link>Properties\SolutionInfo.cs</Link>
     </Compile>
@@ -179,4 +182,4 @@
       <Name>Octokit-Mono</Name>
     </ProjectReference>
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/Octokit.Reactive/Octokit.Reactive-MonoAndroid.csproj b/Octokit.Reactive/Octokit.Reactive-MonoAndroid.csproj
index d0f878da..ce887c4c 100644
--- a/Octokit.Reactive/Octokit.Reactive-MonoAndroid.csproj
+++ b/Octokit.Reactive/Octokit.Reactive-MonoAndroid.csproj
@@ -60,6 +60,9 @@
     <Compile Include="..\Octokit\Helpers\Ensure.cs">
       <Link>Helpers\Ensure.cs</Link>
     </Compile>
+    <Compile Include="..\Octokit\Helpers\Pagination.cs">
+      <Link>Helpers\Pagination.cs</Link>
+    </Compile>
     <Compile Include="..\SolutionInfo.cs">
       <Link>Properties\SolutionInfo.cs</Link>
     </Compile>
@@ -187,4 +190,4 @@
       <Name>Octokit-MonoAndroid</Name>
     </ProjectReference>
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/Octokit.Reactive/Octokit.Reactive-Monotouch.csproj b/Octokit.Reactive/Octokit.Reactive-Monotouch.csproj
index ce3efdbe..14a1c7ea 100644
--- a/Octokit.Reactive/Octokit.Reactive-Monotouch.csproj
+++ b/Octokit.Reactive/Octokit.Reactive-Monotouch.csproj
@@ -56,6 +56,9 @@
     <Compile Include="..\Octokit\Helpers\Ensure.cs">
       <Link>Helpers\Ensure.cs</Link>
     </Compile>
+    <Compile Include="..\Octokit\Helpers\Pagination.cs">
+      <Link>Helpers\Pagination.cs</Link>
+    </Compile>
     <Compile Include="..\SolutionInfo.cs">
       <Link>Properties\SolutionInfo.cs</Link>
     </Compile>
@@ -183,4 +186,4 @@
       <Name>Octokit-Monotouch</Name>
     </ProjectReference>
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/Octokit.Reactive/Octokit.Reactive.csproj b/Octokit.Reactive/Octokit.Reactive.csproj
index 607a71eb..ebf316aa 100644
--- a/Octokit.Reactive/Octokit.Reactive.csproj
+++ b/Octokit.Reactive/Octokit.Reactive.csproj
@@ -72,6 +72,9 @@
     <Compile Include="..\Octokit\Helpers\Ensure.cs">
       <Link>Helpers\Ensure.cs</Link>
     </Compile>
+    <Compile Include="..\Octokit\Helpers\Pagination.cs">
+      <Link>Helpers\Pagination.cs</Link>
+    </Compile>
     <Compile Include="..\SolutionInfo.cs">
       <Link>Properties\SolutionInfo.cs</Link>
     </Compile>
diff --git a/Octokit/Helpers/Pagination.cs b/Octokit/Helpers/Pagination.cs
new file mode 100644
index 00000000..1acf39ea
--- /dev/null
+++ b/Octokit/Helpers/Pagination.cs
@@ -0,0 +1,76 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+
+namespace Octokit
+{
+    internal static class Pagination
+    {
+        internal static IDictionary<string, string> Setup(IDictionary<string, string> parameters, ApiOptions options)
+        {
+            parameters = parameters ?? new Dictionary<string, string>();
+
+            if (options.PageSize.HasValue)
+            {
+                parameters.Add("per_page", options.PageSize.Value.ToString(CultureInfo.InvariantCulture));
+            }
+
+            if (options.StartPage.HasValue)
+            {
+                parameters.Add("page", options.StartPage.Value.ToString(CultureInfo.InvariantCulture));
+            }
+
+            return parameters;
+        }
+
+        internal static bool ShouldContinue(
+            Uri uri,
+            ApiOptions options)
+        {
+            if (uri == null)
+            {
+                return false;
+            }
+
+            if (uri.Query.Contains("page=") && options.PageCount.HasValue)
+            {
+                var allValues = ToQueryStringDictionary(uri);
+
+                string pageValue;
+                if (allValues.TryGetValue("page", out pageValue))
+                {
+                    var startPage = options.StartPage ?? 1;
+                    var pageCount = options.PageCount.Value;
+
+                    var endPage = startPage + pageCount;
+                    if (pageValue.Equals(endPage.ToString(CultureInfo.InvariantCulture), StringComparison.OrdinalIgnoreCase))
+                    {
+                        return false;
+                    }
+                }
+            }
+
+            return true;
+        }
+
+        static Dictionary<string, string> ToQueryStringDictionary(Uri uri)
+        {
+            return uri.Query.Split('&')
+                .Select(keyValue =>
+                {
+                    var indexOf = keyValue.IndexOf('=');
+                    if (indexOf > 0)
+                    {
+                        var key = keyValue.Substring(0, indexOf);
+                        var value = keyValue.Substring(indexOf + 1);
+                        return new KeyValuePair<string, string>(key, value);
+                    }
+
+                    //just a plain old value, return it
+                    return new KeyValuePair<string, string>(keyValue, null);
+                })
+                .ToDictionary(x => x.Key, x => x.Value);
+        }
+    }
+}
diff --git a/Octokit/Octokit-Mono.csproj b/Octokit/Octokit-Mono.csproj
index c518b97d..3e4bcc99 100644
--- a/Octokit/Octokit-Mono.csproj
+++ b/Octokit/Octokit-Mono.csproj
@@ -448,6 +448,7 @@
     <Compile Include="Models\Request\Enterprise\SearchIndexingTarget.cs" />
     <Compile Include="Models\Response\Enterprise\SearchIndexingResponse.cs" />
     <Compile Include="Models\Request\ApiOptions.cs" />
+    <Compile Include="Helpers\Pagination.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/Octokit/Octokit-MonoAndroid.csproj b/Octokit/Octokit-MonoAndroid.csproj
index 904a34c0..4bda9bba 100644
--- a/Octokit/Octokit-MonoAndroid.csproj
+++ b/Octokit/Octokit-MonoAndroid.csproj
@@ -456,6 +456,7 @@
     <Compile Include="Models\Request\Enterprise\SearchIndexingTarget.cs" />
     <Compile Include="Models\Response\Enterprise\SearchIndexingResponse.cs" />
     <Compile Include="Models\Request\ApiOptions.cs" />
+    <Compile Include="Helpers\Pagination.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Novell\Novell.MonoDroid.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/Octokit/Octokit-Monotouch.csproj b/Octokit/Octokit-Monotouch.csproj
index 9816e046..8dabb0fa 100644
--- a/Octokit/Octokit-Monotouch.csproj
+++ b/Octokit/Octokit-Monotouch.csproj
@@ -452,6 +452,7 @@
     <Compile Include="Models\Request\Enterprise\SearchIndexingTarget.cs" />
     <Compile Include="Models\Response\Enterprise\SearchIndexingResponse.cs" />
     <Compile Include="Models\Request\ApiOptions.cs" />
+    <Compile Include="Helpers\Pagination.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.MonoTouch.CSharp.targets" />
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
diff --git a/Octokit/Octokit-Portable.csproj b/Octokit/Octokit-Portable.csproj
index f2faa095..6f03fac3 100644
--- a/Octokit/Octokit-Portable.csproj
+++ b/Octokit/Octokit-Portable.csproj
@@ -445,6 +445,7 @@
     <Compile Include="Models\Request\Enterprise\SearchIndexingTarget.cs" />
     <Compile Include="Models\Response\Enterprise\SearchIndexingResponse.cs" />
     <Compile Include="Models\Request\ApiOptions.cs" />
+    <Compile Include="Helpers\Pagination.cs" />
   </ItemGroup>
   <ItemGroup>
     <CodeAnalysisDictionary Include="..\CustomDictionary.xml">
diff --git a/Octokit/Octokit-netcore45.csproj b/Octokit/Octokit-netcore45.csproj
index 2a4d4aa8..7268c43b 100644
--- a/Octokit/Octokit-netcore45.csproj
+++ b/Octokit/Octokit-netcore45.csproj
@@ -452,6 +452,7 @@
     <Compile Include="Models\Request\Enterprise\SearchIndexingTarget.cs" />
     <Compile Include="Models\Response\Enterprise\SearchIndexingResponse.cs" />
     <Compile Include="Models\Request\ApiOptions.cs" />
+    <Compile Include="Helpers\Pagination.cs" />
   </ItemGroup>
   <ItemGroup>
     <CodeAnalysisDictionary Include="..\CustomDictionary.xml">
diff --git a/Octokit/Octokit.csproj b/Octokit/Octokit.csproj
index 22536261..0eb8c1d0 100644
--- a/Octokit/Octokit.csproj
+++ b/Octokit/Octokit.csproj
@@ -102,6 +102,7 @@
     <Compile Include="Helpers\ApiUrls.Keys.cs" />
     <Compile Include="Helpers\ConcurrentCache.cs" />
     <Compile Include="Helpers\HttpClientExtensions.cs" />
+    <Compile Include="Helpers\Pagination.cs" />
     <Compile Include="Helpers\PropertyOrField.cs" />
     <Compile Include="Helpers\SerializeNullAttribute.cs" />
     <Compile Include="Helpers\WebHookConfigComparer.cs" />
@@ -484,4 +485,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>
\ No newline at end of file