MRB webassembly
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Chase Tucker
208
MesaFabApproval.Client/Services/UserService.cs
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208
MesaFabApproval.Client/Services/UserService.cs
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using System.Security.Claims;
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using System.Text.Json;
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using MesaFabApproval.Shared.Models;
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using Microsoft.AspNetCore.Components.WebAssembly.Http;
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using Microsoft.Extensions.Caching.Memory;
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namespace MesaFabApproval.Client.Services;
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public interface IUserService {
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ClaimsPrincipal GetClaimsPrincipalFromUser(User user);
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string GetLoginIdFromClaimsPrincipal(ClaimsPrincipal claimsPrincipal);
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Task<User> GetUserFromClaimsPrincipal(ClaimsPrincipal claimsPrincipal);
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Task<User> GetUserByUserId(int userId);
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Task<User> GetUserByLoginId(string loginId);
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Task<IEnumerable<User>> GetAllActiveUsers();
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Task<IEnumerable<int>> GetApproverUserIdsBySubRoleCategoryItem(string item);
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}
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public class UserService : IUserService {
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private readonly IMemoryCache _cache;
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private readonly IHttpClientFactory _httpClientFactory;
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public UserService(IMemoryCache cache, IHttpClientFactory httpClientFactory) {
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_cache = cache ?? throw new ArgumentNullException("IMemoryCache not injected");
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_httpClientFactory = httpClientFactory ?? throw new ArgumentNullException("IHttpClientFactory not injected");
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}
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public ClaimsPrincipal GetClaimsPrincipalFromUser(User user) {
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if (user is null) throw new ArgumentNullException("user cannot be null");
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List<Claim> claims = new() {
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new Claim(nameof(user.LoginID), user.LoginID)
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};
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if (user.IsManager) claims.Add(new Claim(ClaimTypes.Role, "manager"));
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if (user.IsAdmin) claims.Add(new Claim(ClaimTypes.Role, "admin"));
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ClaimsIdentity identity = new ClaimsIdentity(claims, "MesaFabApprovalWasm");
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return new ClaimsPrincipal(identity);
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}
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public async Task<User> GetUserByUserId(int userId) {
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if (userId <= 0) throw new ArgumentException($"{userId} is not a valid user ID");
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User? user = _cache.Get<User>($"user{userId}");
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if (user is null)
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user = _cache.Get<IEnumerable<User>>("allActiveUsers")?.FirstOrDefault(u => u.UserID == userId);
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if (user is null) {
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HttpClient httpClient = _httpClientFactory.CreateClient("API");
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HttpRequestMessage requestMessage = new(HttpMethod.Get, $"user/userId?userId={userId}");
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HttpResponseMessage responseMessage = await httpClient.SendAsync(requestMessage);
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if (responseMessage.IsSuccessStatusCode) {
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string responseContent = await responseMessage.Content.ReadAsStringAsync();
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JsonSerializerOptions jsonSerializerOptions = new() {
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PropertyNameCaseInsensitive = true
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};
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user = JsonSerializer.Deserialize<User>(responseContent, jsonSerializerOptions) ??
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throw new Exception("Unable to parse user from API response");
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_cache.Set($"user{userId}", user, DateTimeOffset.Now.AddDays(1));
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} else {
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throw new Exception($"GetUserByUserId failed for user {userId}, because {responseMessage.ReasonPhrase}");
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}
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}
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if (user is null) throw new Exception($"User for userId {userId} not found");
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return user;
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}
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public async Task<User> GetUserByLoginId(string loginId) {
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if (string.IsNullOrWhiteSpace(loginId))
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throw new ArgumentNullException("loginId cannot be null or empty");
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User? user = _cache.Get<User>($"user{loginId}");
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if (user is null)
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user = _cache.Get<IEnumerable<User>>("allActiveUsers")?.FirstOrDefault(u => u.LoginID == loginId);
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if (user is null) {
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HttpClient httpClient = _httpClientFactory.CreateClient("API");
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HttpRequestMessage requestMessage = new(HttpMethod.Get, $"user/loginId?loginId={loginId}");
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HttpResponseMessage responseMessage = await httpClient.SendAsync(requestMessage);
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if (responseMessage.IsSuccessStatusCode) {
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string responseContent = await responseMessage.Content.ReadAsStringAsync();
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JsonSerializerOptions jsonSerializerOptions = new() {
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PropertyNameCaseInsensitive = true
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};
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user = JsonSerializer.Deserialize<User>(responseContent, jsonSerializerOptions) ??
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throw new Exception("Unable to parse user from API response");
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_cache.Set($"user{loginId}", user, DateTimeOffset.Now.AddDays(1));
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} else {
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throw new Exception($"GetUserByLoginId failed for {loginId}, because {responseMessage.ReasonPhrase}");
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}
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}
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if (user is null) throw new Exception($"User for loginId {loginId} not found");
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return user;
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}
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public async Task<IEnumerable<User>> GetAllActiveUsers() {
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IEnumerable<User>? activeUsers = _cache.Get<IEnumerable<User>>("allActiveUsers");
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if (activeUsers is null) {
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HttpClient httpClient = _httpClientFactory.CreateClient("API");
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HttpRequestMessage requestMessage = new(HttpMethod.Get, $"users/active");
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HttpResponseMessage responseMessage = await httpClient.SendAsync(requestMessage);
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if (responseMessage.IsSuccessStatusCode) {
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string responseContent = await responseMessage.Content.ReadAsStringAsync();
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JsonSerializerOptions jsonSerializerOptions = new() {
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PropertyNameCaseInsensitive = true
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};
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activeUsers = JsonSerializer.Deserialize<IEnumerable<User>>(responseContent, jsonSerializerOptions) ??
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throw new Exception("Unable to parse user from API response");
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_cache.Set("allActiveUsers", activeUsers, DateTimeOffset.Now.AddHours(1));
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} else {
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throw new Exception($"Cannot get all active users, because {responseMessage.ReasonPhrase}");
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}
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}
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if (activeUsers is null)
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throw new Exception("unable to fetch all active users");
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return activeUsers;
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}
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public string GetLoginIdFromClaimsPrincipal(ClaimsPrincipal principal) {
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if (principal is null) throw new ArgumentNullException("Principal cannot be null");
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Claim loginIdClaim = principal.FindFirst("LoginID") ??
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throw new Exception("LoginID claim not found in principal");
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string loginId = loginIdClaim.Value;
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return loginId;
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}
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public async Task<User> GetUserFromClaimsPrincipal(ClaimsPrincipal claimsPrincipal) {
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if (claimsPrincipal is null) throw new ArgumentNullException("ClaimsPrincipal cannot be null");
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Claim loginIdClaim = claimsPrincipal.FindFirst("LoginID") ??
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throw new Exception("LoginID claim not found in principal");
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string loginId = loginIdClaim.Value ??
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throw new Exception("LoginID claim value is null");
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User user = await GetUserByLoginId(loginId) ??
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throw new Exception($"User for loginId {loginId} not found");
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return user;
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}
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public async Task<IEnumerable<int>> GetApproverUserIdsBySubRoleCategoryItem(string item) {
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if (string.IsNullOrWhiteSpace(item)) throw new ArgumentException("SubRoleCategoryItem cannot be null or empty");
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IEnumerable<int>? approverUserIds = _cache.Get<IEnumerable<int>>($"approvers{item}");
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if (approverUserIds is null) {
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HttpClient httpClient = _httpClientFactory.CreateClient("API");
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HttpRequestMessage requestMessage = new(HttpMethod.Get, $"approver?subRoleCategoryItem={item}");
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HttpResponseMessage responseMessage = await httpClient.SendAsync(requestMessage);
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if (responseMessage.IsSuccessStatusCode) {
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string responseContent = await responseMessage.Content.ReadAsStringAsync();
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JsonSerializerOptions jsonSerializerOptions = new() {
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PropertyNameCaseInsensitive = true
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};
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approverUserIds = JsonSerializer.Deserialize<IEnumerable<int>>(responseContent, jsonSerializerOptions) ??
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throw new Exception("Unable to parse user from API response");
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_cache.Set($"approvers{item}", approverUserIds, DateTimeOffset.Now.AddDays(1));
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} else {
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throw new Exception($"Unable to get approvers for SubRoleCategoryItem {item}, because {responseMessage.ReasonPhrase}");
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}
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}
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if (approverUserIds is null) throw new Exception($"Approvers for SubRoleCategoryItem {item} not found");
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return approverUserIds;
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}
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}
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