feat(web,api): added ability to add and then display list of institutions

src/FiscalOS.API/Institutions/Get/Endpoint.cs

@@ -0,0 +1,34 @@
+namespace FiscalOS.API.Institutions.Get;
+
+internal static class Endpoint
+{
+  private const string Route = "/";
+
+  public static RouteHandlerBuilder MapGetEndpoint(this RouteGroupBuilder groupBuilder)
+  {
+    return groupBuilder.MapGet(Route, HandleAsync);
+  }
+
+  private static async Task<IResult> HandleAsync(
+    HttpContext httpContext,
+    [FromServices] AppDbContext appDbContext
+  )
+  {
+    var userId = httpContext.GetUserId();
+
+    var user = await appDbContext.Users
+      .Include(u => u.Institutions)
+      .FirstOrDefaultAsync(u => u.Id == userId);
+
+    if (user is null)
+    {
+      return Results.Unauthorized();
+    }
+
+    var institutionDtos = user.Institutions
+      .Select(InstitutionDto.FromInstitution)
+      .OrderBy(dto => dto.Name);
+
+    return Results.Ok(Response.From(institutionDtos));
+  }
+}