feat(email): add safe message detail

JobTrackerApi/Controllers/CorrespondenceController.cs

@@ -3,6 +3,8 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
 using JobTrackerApi.Data;
 using JobTrackerApi.Models;
+using JobTrackerApi.Services.EmailProviders;
+using System.Text.Json;
 
 namespace JobTrackerApi.Controllers
 {
@@ -42,6 +44,8 @@ namespace JobTrackerApi.Controllers
             DateTime Date,
             string ContentPreview,
             string? ExternalThreadId,
+            string? ExternalMessageId,
+            string? Provider,
             string? ExternalFrom,
             string? ExternalTo,
             int LabelCount,
@@ -84,27 +88,50 @@ namespace JobTrackerApi.Controllers
                 query = query.Where(c => c.ExternalThreadId == null);
             }
 
-            var items = await query
+            var rows = await query
                 .OrderByDescending(c => c.Date)
                 .Take(200)
-                .Select(c => new CorrespondenceInboxItemDto(
+                .Select(c => new
+                {
                     c.Id,
                     c.JobApplicationId,
-                    c.JobApplication.Company != null ? c.JobApplication.Company.Name : null,
-                    c.JobApplication.JobTitle,
+                    CompanyName = c.JobApplication.Company != null ? c.JobApplication.Company.Name : null,
+                    JobTitle = c.JobApplication.JobTitle,
                     c.From,
                     c.Direction,
                     c.Subject,
                     c.Channel,
                     c.Date,
-                    c.Content.Length <= 220 ? c.Content : c.Content.Substring(0, 220),
+                    ContentPreview = c.Content.Length <= 220 ? c.Content : c.Content.Substring(0, 220),
                     c.ExternalThreadId,
+                    c.ExternalMessageId,
+                    c.Provider,
                     c.ExternalFrom,
                     c.ExternalTo,
-                    c.ExternalLabelsJson != null ? 1 : 0,
-                    c.AttachmentMetadataJson != null ? 1 : 0))
+                    c.ExternalLabelsJson,
+                    c.AttachmentMetadataJson,
+                })
                 .ToListAsync(cancellationToken);
 
+            var items = rows.Select(c => new CorrespondenceInboxItemDto(
+                c.Id,
+                c.JobApplicationId,
+                c.CompanyName,
+                c.JobTitle,
+                c.From,
+                c.Direction,
+                c.Subject,
+                c.Channel,
+                c.Date,
+                c.ContentPreview,
+                c.ExternalThreadId,
+                c.ExternalMessageId,
+                c.Provider,
+                c.ExternalFrom,
+                c.ExternalTo,
+                DeserializeLabels(c.ExternalLabelsJson).Count,
+                DeserializeAttachments(c.AttachmentMetadataJson).Count)).ToList();
+
             return Ok(items);
         }
 
@@ -123,6 +150,25 @@ namespace JobTrackerApi.Controllers
             return Ok(messages);
         }
 
+        [HttpGet("message/{id:int}")]
+        public async Task<ActionResult<EmailMessageDetailDto>> GetMessage([FromRoute] int id, CancellationToken cancellationToken)
+        {
+            var message = await FindOwnedMessageAsync(id, cancellationToken);
+            if (message is null) return NotFound();
+
+            return Ok(new EmailMessageDetailDto(
+                message.ExternalMessageId ?? $"correspondence-{message.Id}",
+                message.ExternalThreadId ?? string.Empty,
+                message.Subject ?? string.Empty,
+                message.ExternalFrom ?? message.From,
+                message.ExternalTo ?? string.Empty,
+                new DateTimeOffset(DateTime.SpecifyKind(message.Date, DateTimeKind.Local)),
+                message.Content.Length <= 220 ? message.Content : message.Content[..220],
+                message.Content,
+                DeserializeLabels(message.ExternalLabelsJson),
+                DeserializeAttachments(message.AttachmentMetadataJson)));
+        }
+
         public sealed record CreateCorrespondenceRequest(int JobApplicationId, string From, string Content);
         public sealed record CreateCorrespondenceRequestV2(
             int JobApplicationId,
@@ -186,5 +232,27 @@ namespace JobTrackerApi.Controllers
             await _db.SaveChangesAsync(cancellationToken);
             return NoContent();
         }
+
+        private static IReadOnlyList<string> DeserializeLabels(string? json)
+        {
+            if (string.IsNullOrWhiteSpace(json)) return Array.Empty<string>();
+            try { return JsonSerializer.Deserialize<List<string>>(json) ?? new List<string>(); }
+            catch (JsonException) { return Array.Empty<string>(); }
+        }
+
+        private static IReadOnlyList<EmailAttachmentRef> DeserializeAttachments(string? json)
+        {
+            if (string.IsNullOrWhiteSpace(json)) return Array.Empty<EmailAttachmentRef>();
+            try
+            {
+                return (JsonSerializer.Deserialize<List<CorrespondenceAttachmentMetadata>>(json) ?? new List<CorrespondenceAttachmentMetadata>())
+                    .Select(item => new EmailAttachmentRef(item.FileName, item.MimeType, item.SizeBytes, item.GmailAttachmentId, item.Inline))
+                    .ToList();
+            }
+            catch (JsonException)
+            {
+                return Array.Empty<EmailAttachmentRef>();
+            }
+        }
     }
 }