Initial import into Gitea
This commit is contained in:
Grae Jones
230
Creative/Services/CreativeService.cs
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230
Creative/Services/CreativeService.cs
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using System.Text.Json;
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using Creative.Models;
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namespace Creative.Services;
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/// <summary>
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/// Main creative service - dispatches operations to appropriate handlers.
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/// Stateless: returns JSON, Gateway handles persistence.
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/// </summary>
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public class CreativeService
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{
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private readonly ScraperService _scraper;
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private readonly CopyGeneratorService _copyGen;
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private readonly ImageGeneratorService _imageGen;
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private readonly ILogger<CreativeService> _logger;
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public CreativeService(
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ScraperService scraper,
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CopyGeneratorService copyGen,
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ImageGeneratorService imageGen,
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ILogger<CreativeService> logger)
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{
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_scraper = scraper;
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_copyGen = copyGen;
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_imageGen = imageGen;
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_logger = logger;
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}
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/// <summary>
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/// Main dispatch method - routes to appropriate operation handler.
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/// </summary>
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public async Task<CreativeResponse> ExecuteAsync(CreativeRequest request, CancellationToken ct)
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{
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var requestId = request.RequestId ?? Guid.NewGuid().ToString("N");
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var operation = (request.Operation ?? "").Trim();
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_logger.LogInformation("[Creative] Executing {Operation} | RequestId={RequestId}",
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operation, requestId);
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try
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{
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return operation switch
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{
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"Ping" => Ping(requestId),
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"AnalyzeUrl" => await AnalyzeUrlAsync(request, requestId, ct),
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"GenerateAssets" => await GenerateAssetsAsync(request, requestId, ct),
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"GetImages" => await GetImagesAsync(request, requestId, ct),
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"CreateDraft" => await CreateDraftAsync(request, requestId, ct),
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_ => CreativeResponse.Fail(requestId, "UNKNOWN_OPERATION",
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$"Unknown operation: {operation}")
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};
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "[Creative] {Operation} failed | RequestId={RequestId}",
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operation, requestId);
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return CreativeResponse.Fail(requestId, "INTERNAL_ERROR", ex.Message);
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}
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}
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// ============================================================
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// Operations
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// ============================================================
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/// <summary>
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/// Health check.
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/// </summary>
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private static CreativeResponse Ping(string requestId)
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{
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return CreativeResponse.Success(requestId, new
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{
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pong = true,
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timestamp = DateTimeOffset.UtcNow
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});
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}
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/// <summary>
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/// Scrape and analyze a URL. Returns structured content.
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/// Payload: { "url": "https://..." }
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/// </summary>
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private async Task<CreativeResponse> AnalyzeUrlAsync(
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CreativeRequest request, string requestId, CancellationToken ct)
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{
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var url = GetPayloadString(request, "url");
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if (string.IsNullOrWhiteSpace(url))
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return CreativeResponse.Fail(requestId, "MISSING_URL", "payload.url is required");
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url = NormalizeUrl(url);
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var analysis = await _scraper.AnalyzeUrlAsync(url, ct);
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return CreativeResponse.Success(requestId, analysis);
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}
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/// <summary>
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/// Generate text assets from previously analyzed content.
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/// Payload: { "analysis": { ... } } (UrlAnalysis object)
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/// </summary>
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private async Task<CreativeResponse> GenerateAssetsAsync(
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CreativeRequest request, string requestId, CancellationToken ct)
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{
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var analysisJson = GetPayloadObject(request, "analysis");
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if (analysisJson == null)
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return CreativeResponse.Fail(requestId, "MISSING_ANALYSIS",
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"payload.analysis is required (pass result from AnalyzeUrl)");
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var analysis = JsonSerializer.Deserialize<UrlAnalysis>(analysisJson.Value.GetRawText());
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if (analysis == null)
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return CreativeResponse.Fail(requestId, "INVALID_ANALYSIS",
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"Could not deserialize analysis object");
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var (headlines, descriptions, source) = await _copyGen.GenerateAsync(analysis, ct);
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return CreativeResponse.Success(requestId, new
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{
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headlines,
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descriptions,
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source
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});
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}
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/// <summary>
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/// Get images matching previously analyzed content.
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/// Payload: { "analysis": { ... } } (UrlAnalysis object)
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/// </summary>
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private async Task<CreativeResponse> GetImagesAsync(
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CreativeRequest request, string requestId, CancellationToken ct)
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{
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var analysisJson = GetPayloadObject(request, "analysis");
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if (analysisJson == null)
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return CreativeResponse.Fail(requestId, "MISSING_ANALYSIS",
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"payload.analysis is required (pass result from AnalyzeUrl)");
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var analysis = JsonSerializer.Deserialize<UrlAnalysis>(analysisJson.Value.GetRawText());
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if (analysis == null)
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return CreativeResponse.Fail(requestId, "INVALID_ANALYSIS",
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"Could not deserialize analysis object");
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var (images, source) = await _imageGen.GenerateAsync(analysis, ct);
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return CreativeResponse.Success(requestId, new
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{
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images,
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source
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});
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}
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/// <summary>
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/// Full pipeline: scrape URL → generate copy → source images → return campaign draft.
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/// Payload: { "url": "https://..." }
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/// Gateway persists the returned draft to tbCreativeDraft.
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/// </summary>
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private async Task<CreativeResponse> CreateDraftAsync(
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CreativeRequest request, string requestId, CancellationToken ct)
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{
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var url = GetPayloadString(request, "url");
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if (string.IsNullOrWhiteSpace(url))
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return CreativeResponse.Fail(requestId, "MISSING_URL", "payload.url is required");
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url = NormalizeUrl(url);
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// Step 1: Scrape
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_logger.LogInformation("[Creative] CreateDraft step 1/3: scraping {Url}", url);
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var analysis = await _scraper.AnalyzeUrlAsync(url, ct);
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// Step 2: Generate copy
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_logger.LogInformation("[Creative] CreateDraft step 2/3: generating copy");
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var (headlines, descriptions, copySource) = await _copyGen.GenerateAsync(analysis, ct);
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// Step 3: Source images
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_logger.LogInformation("[Creative] CreateDraft step 3/3: sourcing images");
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var (images, imageSource) = await _imageGen.GenerateAsync(analysis, ct);
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// Assemble draft - Gateway will persist this
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var draftId = Guid.NewGuid().ToString("N")[..12];
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var draft = new CampaignDraft
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{
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DraftId = draftId,
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Url = url,
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Analysis = analysis,
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Headlines = headlines,
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Descriptions = descriptions,
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Images = images,
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Source = copySource,
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ImageSource = imageSource,
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CreatedAt = DateTimeOffset.UtcNow
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};
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_logger.LogInformation(
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"[Creative] Draft assembled | DraftId={DraftId} Headlines={H} Descriptions={D} Images={I} CopySource={CS} ImageSource={IS}",
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draftId, headlines.Count, descriptions.Count, images.Count, copySource, imageSource);
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return CreativeResponse.Success(requestId, draft);
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}
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// ============================================================
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// Helpers
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// ============================================================
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private static string? GetPayloadString(CreativeRequest request, string key)
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{
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if (request.Payload == null) return null;
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if (!request.Payload.TryGetValue(key, out var value)) return null;
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return value switch
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{
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string s => s,
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JsonElement je when je.ValueKind == JsonValueKind.String => je.GetString(),
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_ => value?.ToString()
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};
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}
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private static JsonElement? GetPayloadObject(CreativeRequest request, string key)
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{
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if (request.Payload == null) return null;
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if (!request.Payload.TryGetValue(key, out var value)) return null;
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if (value is JsonElement je && je.ValueKind == JsonValueKind.Object)
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return je;
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return null;
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}
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private static string NormalizeUrl(string url)
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{
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url = url.Trim();
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if (!url.StartsWith("http://") && !url.StartsWith("https://"))
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url = "https://" + url;
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return url;
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}
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}
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