Add PdfController for PDF generation

src/FunderMaps.WebApi/Controllers/PdfController.cs

@@ -0,0 +1,51 @@
+using System.Text;
+using System.Text.Json;
+using FunderMaps.Core.Controllers;
+using Microsoft.AspNetCore.Mvc;
+
+namespace FunderMaps.WebApi.Controllers;
+
+// TODO: This is a makeshift controller to demonstrate the PDF generation.
+public class PdfController(IConfiguration configuration) : FunderMapsController
+{
+    [HttpGet("api/pdf/{id}")]
+    public async Task<IActionResult> GetAsync(string id)
+    {
+        var httpClient = new HttpClient
+        {
+            Timeout = TimeSpan.FromMinutes(5),
+            DefaultRequestHeaders =
+            {
+                { "x-api-key", configuration.GetSection("PdfCo:ApiKey").Value}
+            }
+        };
+
+        try
+        {
+            string jsonBody = JsonSerializer.Serialize(new
+            {
+                url = $"https://whale-app-nm9uv.ondigitalocean.app/{id}",
+                name = $"{id}.pdf",
+                paperSize = "A4",
+                async = false,
+            });
+            using var content = new StringContent(jsonBody, Encoding.UTF8, "application/json");
+
+            HttpResponseMessage response = await httpClient.PostAsync("https://api.pdf.co/v1/pdf/convert/from/url", content);
+            response.EnsureSuccessStatusCode(); // Throw an exception if the request failed
+
+            var jsonResponse = await response.Content.ReadAsStringAsync();
+            var url = JsonSerializer.Deserialize<Dictionary<string, object>>(jsonResponse)["url"];
+
+            return Ok(url);
+        }
+        catch (HttpRequestException ex)
+        {
+            Console.WriteLine($"An error occurred: {ex.Message}");
+        }
+
+        httpClient.Dispose();
+
+        return Ok();
+    }
+}