Initial commit

Author: Matthiee

FinancialModelingPrepApi/Abstractions/IFinancialModelingPrepApiClient.cs

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+namespace FinancialModelingPrepApi.Abstractions
+{
+    public interface IFinancialModelingPrepApiClient
+    {
+    }
+}

FinancialModelingPrepApi/Abstractions/Models/ApiVersion.cs

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+namespace FinancialModelingPrepApi.Abstractions.Models
+{
+    public enum ApiVersion
+    {
+        v3,
+        v4,
+    }
+}

FinancialModelingPrepApi/Core/FinancialModelingPrepApiClient.cs

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+using FinancialModelingPrepApi.Abstractions;
+
+namespace FinancialModelingPrepApi.Core
+{
+    public class FinancialModelingPrepApiClient : IFinancialModelingPrepApiClient
+    {
+       
+    }
+}

FinancialModelingPrepApi/Core/Http/FinancialModelingPrepHttpClient.cs

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+using System;
+using System.Collections.Specialized;
+using System.Net.Http;
+using System.Threading.Tasks;
+
+namespace FinancialModelingPrepApi.Core.Http
+{
+    public class FinancialModelingPrepHttpClient
+    {
+        private readonly HttpClient client;
+        private readonly FinancialModelingPrepOptions options;
+
+        public FinancialModelingPrepHttpClient(HttpClient client, FinancialModelingPrepOptions options)
+        {
+            this.client = client ?? throw new ArgumentNullException(nameof(client));
+            this.options = options ?? throw new ArgumentNullException(nameof(options));
+
+            if (string.IsNullOrWhiteSpace(this.options.ApiKey))
+            {
+                throw new ArgumentException("'ApiKey' can not be null or empty");
+            }
+        }
+
+        public async Task<string> CallApiAsync(string urlPattern, NameValueCollection pathParams, QueryStringBuilder queryString)
+        {
+            PreProcessUrl(ref urlPattern, ref pathParams, ref queryString);
+
+            queryString.Add("apikey", options.ApiKey);
+
+            var requestUrl = $"{urlPattern}{queryString}";
+
+            using var response = await client.GetAsync(requestUrl);
+            return await response.EnsureSuccessStatusCode().Content.ReadAsStringAsync();
+        }
+
+        private static void PreProcessUrl(ref string url, ref NameValueCollection pathParams, ref QueryStringBuilder qsb)
+        {
+            if (string.IsNullOrEmpty(url))
+            {
+                throw new ArgumentNullException(nameof(url));
+            }
+
+            if (pathParams == null)
+            {
+                throw new ArgumentNullException(nameof(pathParams));
+            }
+
+            qsb ??= new QueryStringBuilder();
+
+            if (pathParams.Count == 0)
+            {
+                return;
+            }
+
+            foreach (string key in pathParams.Keys)
+            {
+                if (string.IsNullOrWhiteSpace(key))
+                {
+                    throw new ArgumentException("Provided path parameter was null or empty");
+                }
+                else if (string.IsNullOrWhiteSpace(pathParams[key]))
+                {
+                    throw new ArgumentException($"Provided path parameter value for {key} was null or empty");
+                }
+                else if (url.IndexOf($"[{key}]") < 0)
+                {
+                    throw new ArgumentException($"Url pattern doesn't contain [{key}]");
+                }
+
+                url = url.Replace($"[{key}]", pathParams[key]);
+            }
+        }
+    }
+}

FinancialModelingPrepApi/Core/Http/QueryStringBuilder.cs

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+using System.Collections.Specialized;
+
+namespace FinancialModelingPrepApi.Core.Http
+{
+    public class QueryStringBuilder
+    {
+        private readonly NameValueCollection queryParams;
+
+        public QueryStringBuilder()
+        {
+            queryParams = new NameValueCollection();
+        }
+
+        public void Add(string key, object value)
+        {
+            if (string.IsNullOrEmpty(key))
+            {
+                return;
+            }
+
+            var valueToAdd = value?.ToString().Trim();
+            queryParams.Add(key, valueToAdd);
+        }
+
+        public override string ToString()
+        {
+            if (queryParams.Count == 0)
+            {
+                return string.Empty;
+            }
+
+            return $"?{queryParams}";
+        }
+    }
+}

FinancialModelingPrepApi/DependencyInjectionExtensions.cs

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+using FinancialModelingPrepApi.Abstractions;
+using FinancialModelingPrepApi.Core;
+using FinancialModelingPrepApi.Core.Http;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using System;
+
+namespace FinancialModelingPrepApi
+{
+    public static class DependencyInjectionExtensions
+    {
+        public static void AddFinancialModelingPrepApiClient(this IServiceCollection services)
+        {
+            services.AddLogging();
+            services.AddHttpClient<FinancialModelingPrepHttpClient>(client 
+                => client.BaseAddress = new Uri("https://financialmodelingprep.com/api/"));
+            services.TryAddSingleton<IFinancialModelingPrepApiClient, FinancialModelingPrepApiClient>();
+        }
+    }
+}

FinancialModelingPrepApi/FinancialModelingPrepApi.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="5.0.0" />
+  </ItemGroup>
+
+</Project>

FinancialModelingPrepApi/FinancialModelingPrepApi.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31229.75
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FinancialModelingPrepApi", "FinancialModelingPrepApi.csproj", "{B691C86E-CE23-40FA-811E-8D17BE9DD8BE}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B691C86E-CE23-40FA-811E-8D17BE9DD8BE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B691C86E-CE23-40FA-811E-8D17BE9DD8BE}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B691C86E-CE23-40FA-811E-8D17BE9DD8BE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B691C86E-CE23-40FA-811E-8D17BE9DD8BE}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {9A0E2AE7-CBFD-4C5C-89DF-A920130130FD}
+	EndGlobalSection
+EndGlobal

FinancialModelingPrepApi/FinancialModelingPrepOptions.cs

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+namespace FinancialModelingPrepApi
+{
+    public class FinancialModelingPrepOptions
+    {
+        public string ApiKey { get; set; } = "demo";
+    }
+}