feat(career): CV builder backend — data-driven theme engine + variant model

Phase 4 foundation. A CvVariant is a lens over the master CareerProfile (section order/visibility, per-item overrides keyed by ItemKey, theme + builder settings) — it references career data, never duplicates it. One renderer (ThemedCvRenderer) draws every theme; a theme is pure data (CvThemeCatalog, 8 professional themes), so adding a theme needs no renderer change. Autosave version history + non-destructive restore, public CV via /api/public-cv/{slug} (anonymous, noindex, filter-bypassing owner load), and an AI-assist endpoint reusing the existing provider abstraction (suggestions only, never auto-applied). - Models: CvVariant/CvVariantVersion, CvVariantSettings, CvTheme + catalog - Services: CvVariantResolver (profile+lens -> render model), ThemedCvRenderer, CvVariantService, CareerProfileService.LoadStructuredForOwnerAsync (public) - API: CvVariantController (/api/cv), PublicCvController (/api/public-cv) - Migration AddCvVariants (2 self-contained tables; verified applied on the running container), 16 tests (resolver/renderer/service), 296 backend green Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-18 09:52:58 +02:00
parent 707d8c59d2
commit a3e18e4b44
15 changed files with 3842 additions and 0 deletions
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+using JobTrackerApi.Models;
+using JobTrackerApi.Services;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+
+namespace JobTrackerApi.Controllers;
+
+// Phase 4 — Career Workspace Builder API. Every endpoint reads the master profile through
+// ICareerProfileService and renders through the data-driven theme engine; none of them store career
+// data. docs/architecture/cv-builder.md.
+[ApiController]
+[Route("api/cv")]
+[Authorize(AuthenticationSchemes = "local")]
+public sealed class CvVariantController : ControllerBase
+{
+    private readonly UserManager<ApplicationUser> _users;
+    private readonly ICvVariantService _variants;
+    private readonly ICvPdfExporter _pdf;
+    private readonly ISummarizerService _ai;
+
+    public CvVariantController(UserManager<ApplicationUser> users, ICvVariantService variants, ICvPdfExporter pdf, ISummarizerService ai)
+    {
+        _users = users;
+        _variants = variants;
+        _pdf = pdf;
+        _ai = ai;
+    }
+
+    public sealed record VariantDto(int Id, string Name, CvVariantSettings Settings, bool IsPublic, string PublicSlug, int Version, int? JobApplicationId, DateTimeOffset UpdatedAtUtc);
+    public sealed record CreateVariantRequest(string? Name, int? JobApplicationId, CvVariantSettings? Settings);
+    public sealed record SaveVariantRequest(string? Name, CvVariantSettings? Settings, string? Source);
+    public sealed record PublicToggleRequest(bool IsPublic);
+    public sealed record DuplicateRequest(string? Name);
+    public sealed record PreviewRequest(CvVariantSettings? Settings);
+    public sealed record RenderDto(string ThemeId, string Html, string SuggestedFileName);
+    public sealed record AiAssistRequest(string? Action, string? Text, string? Context, string? Role, string? Language);
+    public sealed record AiAssistResult(string Original, string Result);
+
+    [HttpGet("themes")]
+    public ActionResult<IEnumerable<object>> GetThemes()
+    {
+        var themes = CvThemeCatalog.Themes.Select(t => new
+        {
+            id = t.Id,
+            name = t.Name,
+            category = t.Category,
+            description = t.Description,
+            layout = t.Layout,
+            accent = t.Accent,
+            photoShape = t.PhotoShape,
+            supportsIcons = t.DefaultIcons,
+            swatches = new[] { t.Accent, t.SidebarBg, t.Paper },
+        });
+        return Ok(themes);
+    }
+
+    [HttpGet("variants")]
+    public async Task<ActionResult<IEnumerable<CvVariantSummary>>> List(CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        return Ok(await _variants.ListAsync(user.Id, ct));
+    }
+
+    [HttpPost("variants")]
+    public async Task<ActionResult<VariantDto>> Create([FromBody] CreateVariantRequest? request, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        if (request?.Settings is not null && !CvThemeCatalog.Exists(request.Settings.ThemeId))
+            return BadRequest("Unknown theme.");
+        var variant = await _variants.CreateAsync(user.Id, request?.Name, request?.JobApplicationId, request?.Settings, ct);
+        return Ok(ToDto(variant));
+    }
+
+    [HttpGet("variants/{id:int}")]
+    public async Task<ActionResult<VariantDto>> Get(int id, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var variant = await _variants.GetAsync(user.Id, id, ct);
+        return variant is null ? NotFound() : Ok(ToDto(variant));
+    }
+
+    [HttpPut("variants/{id:int}")]
+    public async Task<ActionResult<VariantDto>> Save(int id, [FromBody] SaveVariantRequest request, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var settings = CvVariantSettingsJson.Normalize(request.Settings);
+        if (!CvThemeCatalog.Exists(settings.ThemeId)) return BadRequest("Unknown theme.");
+        var variant = await _variants.SaveAsync(user.Id, id, request.Name, settings, request.Source ?? "autosave", ct);
+        return variant is null ? NotFound() : Ok(ToDto(variant));
+    }
+
+    [HttpDelete("variants/{id:int}")]
+    public async Task<IActionResult> Delete(int id, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        return await _variants.DeleteAsync(user.Id, id, ct) ? NoContent() : NotFound();
+    }
+
+    [HttpPost("variants/{id:int}/duplicate")]
+    public async Task<ActionResult<VariantDto>> Duplicate(int id, [FromBody] DuplicateRequest? request, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var variant = await _variants.DuplicateAsync(user.Id, id, request?.Name, ct);
+        return variant is null ? NotFound() : Ok(ToDto(variant));
+    }
+
+    [HttpPut("variants/{id:int}/public")]
+    public async Task<ActionResult<VariantDto>> SetPublic(int id, [FromBody] PublicToggleRequest request, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var variant = await _variants.SetPublicAsync(user.Id, id, request.IsPublic, ct);
+        return variant is null ? NotFound() : Ok(ToDto(variant));
+    }
+
+    [HttpGet("variants/{id:int}/versions")]
+    public async Task<ActionResult<IEnumerable<CvVariantVersionInfo>>> Versions(int id, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        return Ok(await _variants.ListVersionsAsync(user.Id, id, ct));
+    }
+
+    [HttpPost("variants/{id:int}/versions/{version:int}/restore")]
+    public async Task<ActionResult<VariantDto>> Restore(int id, int version, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var variant = await _variants.RestoreVersionAsync(user.Id, id, version, ct);
+        return variant is null ? NotFound() : Ok(ToDto(variant));
+    }
+
+    [HttpGet("variants/{id:int}/preview")]
+    public async Task<ActionResult<RenderDto>> Preview(int id, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var render = await _variants.RenderAsync(user.Id, id, Person(user), ct);
+        return render is null ? NotFound() : Ok(new RenderDto(render.ThemeId, render.Html, render.SuggestedFileName));
+    }
+
+    // Live preview for unsaved builder settings.
+    [HttpPost("preview")]
+    public async Task<ActionResult<RenderDto>> PreviewSettings([FromBody] PreviewRequest request, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var settings = CvVariantSettingsJson.Normalize(request.Settings);
+        var render = await _variants.RenderSettingsAsync(user.Id, settings, Person(user), ct);
+        return Ok(new RenderDto(render.ThemeId, render.Html, render.SuggestedFileName));
+    }
+
+    [HttpPost("variants/{id:int}/export-pdf")]
+    public async Task<IActionResult> ExportPdf(int id, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var render = await _variants.RenderAsync(user.Id, id, Person(user), ct);
+        if (render is null) return NotFound();
+        var artifact = await _pdf.ExportAsync(new TailoredCvRenderResult(render.ThemeId, render.SuggestedFileName, render.Html), ct);
+        return File(artifact.Bytes, "application/pdf", artifact.FileName);
+    }
+
+    // AI assistance on any text area. Never mutates the profile or variant — returns a suggestion the
+    // user reviews and applies themselves. Reuses the existing provider abstraction (ISummarizerService).
+    [HttpPost("ai/assist")]
+    public async Task<ActionResult<AiAssistResult>> AiAssist([FromBody] AiAssistRequest request, CancellationToken ct)
+    {
+        var user = await _users.GetUserAsync(User);
+        if (user is null) return Unauthorized();
+        var text = (request.Text ?? string.Empty).Trim();
+        if (text.Length == 0) return BadRequest("Provide text to work on.");
+
+        var instruction = BuildAiInstruction(request.Action, request.Role, request.Language, request.Context);
+        var result = await _ai.SummarizeSectionAsync(instruction, text, 1200, 300);
+        if (string.IsNullOrWhiteSpace(result))
+        {
+            var metrics = await _ai.GetMetricsAsync(ct);
+            return StatusCode(StatusCodes.Status502BadGateway, metrics.Healthy
+                ? "The AI service returned no usable text."
+                : "The AI service is unavailable right now.");
+        }
+        return Ok(new AiAssistResult(text, result.Trim()));
+    }
+
+    private static string BuildAiInstruction(string? action, string? role, string? language, string? context)
+    {
+        var target = string.IsNullOrWhiteSpace(role) ? null : role.Trim();
+        var lang = string.IsNullOrWhiteSpace(language) ? "the same language as the input" : language.Trim();
+        var extra = string.IsNullOrWhiteSpace(context) ? string.Empty : $" Context: {context.Trim()}.";
+        var task = (action ?? "improve").Trim().ToLowerInvariant() switch
+        {
+            "professional" => "Rewrite the text in a more professional, confident tone.",
+            "shorten" => "Make the text more concise without losing meaning.",
+            "expand" => "Expand the text with more concrete, relevant detail — but never invent facts.",
+            "grammar" => "Fix grammar, spelling and punctuation only. Keep wording and meaning.",
+            "ats" => "Rewrite for ATS keyword optimisation: strong action verbs, quantified impact, clear phrasing. Do not invent facts.",
+            "bullets" => "Rewrite as 3–5 tight achievement bullet points, each starting with a strong action verb. Do not invent facts.",
+            "summary" => "Write a concise professional summary (2–3 sentences) from this text. Do not invent facts.",
+            "rewrite" => "Rewrite the text more clearly and compellingly, preserving all facts.",
+            "tailor" => $"Rewrite the text to align with the target role{(target is null ? string.Empty : $" '{target}'")}, emphasising the most relevant experience. Do not invent facts.",
+            _ => "Improve the clarity, impact and phrasing of the text while preserving all facts.",
+        };
+        return $"{task} Preserve every factual claim — never invent employers, titles, dates, or metrics. Write in {lang}. Return only the rewritten text with no preamble.{extra}";
+    }
+
+    private static CvRenderPerson Person(ApplicationUser user)
+    {
+        var name = string.Join(" ", new[] { user.FirstName?.Trim(), user.LastName?.Trim() }.Where(x => !string.IsNullOrWhiteSpace(x)));
+        if (string.IsNullOrWhiteSpace(name)) name = user.DisplayName?.Trim();
+        if (string.IsNullOrWhiteSpace(name)) name = user.UserName?.Trim();
+        if (string.IsNullOrWhiteSpace(name)) name = user.Email?.Trim();
+        if (string.IsNullOrWhiteSpace(name)) name = "Your Name";
+        return new CvRenderPerson(name!, user.AvatarImageDataUrl);
+    }
+
+    private static VariantDto ToDto(CvVariant v) => new(
+        v.Id, v.Name, CvVariantSettingsJson.Deserialize(v.SettingsJson), v.IsPublic, v.PublicSlug, v.Version, v.JobApplicationId, v.UpdatedAtUtc);
+}