feat: implement Iteration 1 — AI recipe recommendations

Backend: - Add Groq LLM client (llama-3.3-70b) for recipe generation with JSON retry strategy (retries only on parse errors, not API errors) - Add Pexels client for parallel photo search per recipe - Add saved_recipes table (migration 004) with JSONB fields - Add GET /recommendations endpoint (profile-aware prompt building) - Add POST/GET/GET{id}/DELETE /saved-recipes CRUD endpoints - Wire gemini, pexels, recommendation, savedrecipe packages in main.go Flutter: - Add Recipe, SavedRecipe models with json_serializable - Add RecipeService (getRecommendations, getSavedRecipes, save, delete) - Add RecommendationsNotifier and SavedRecipesNotifier (Riverpod) - Add RecommendationsScreen with skeleton loading and refresh FAB - Add RecipeDetailScreen (SliverAppBar, nutrition tooltip, steps with timer) - Add SavedRecipesScreen with Dismissible swipe-to-delete and empty state - Update RecipesScreen to TabBar (Recommendations / Saved) - Add /recipe-detail route outside ShellRoute (no bottom nav) - Extend ApiClient with getList() and deleteVoid() Project: - Add CLAUDE.md with English-only rule for comments and commit messages Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-02-21 22:43:29 +02:00
parent 24219b611e
commit e57ff8e06c
41 changed files with 5994 additions and 353 deletions
--- a/backend/internal/recipe/repository.go
+++ b/backend/internal/recipe/repository.go
@@ -0,0 +1,181 @@
+package recipe
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+// Repository handles persistence for recipes.
+type Repository struct {
+	pool *pgxpool.Pool
+}
+
+// NewRepository creates a new Repository.
+func NewRepository(pool *pgxpool.Pool) *Repository {
+	return &Repository{pool: pool}
+}
+
+// Upsert inserts or updates a recipe.
+// Conflict is resolved on spoonacular_id.
+func (r *Repository) Upsert(ctx context.Context, recipe *Recipe) (*Recipe, error) {
+	query := `
+		INSERT INTO recipes (
+			source, spoonacular_id,
+			title, description, title_ru, description_ru,
+			cuisine, difficulty, prep_time_min, cook_time_min, servings, image_url,
+			calories_per_serving, protein_per_serving, fat_per_serving, carbs_per_serving, fiber_per_serving,
+			ingredients, steps, tags
+		) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20)
+		ON CONFLICT (spoonacular_id) DO UPDATE SET
+			title                = EXCLUDED.title,
+			description          = EXCLUDED.description,
+			cuisine              = EXCLUDED.cuisine,
+			difficulty           = EXCLUDED.difficulty,
+			prep_time_min        = EXCLUDED.prep_time_min,
+			cook_time_min        = EXCLUDED.cook_time_min,
+			servings             = EXCLUDED.servings,
+			image_url            = EXCLUDED.image_url,
+			calories_per_serving = EXCLUDED.calories_per_serving,
+			protein_per_serving  = EXCLUDED.protein_per_serving,
+			fat_per_serving      = EXCLUDED.fat_per_serving,
+			carbs_per_serving    = EXCLUDED.carbs_per_serving,
+			fiber_per_serving    = EXCLUDED.fiber_per_serving,
+			ingredients          = EXCLUDED.ingredients,
+			steps                = EXCLUDED.steps,
+			tags                 = EXCLUDED.tags,
+			updated_at           = now()
+		RETURNING id, source, spoonacular_id,
+			title, description, title_ru, description_ru,
+			cuisine, difficulty, prep_time_min, cook_time_min, servings, image_url,
+			calories_per_serving, protein_per_serving, fat_per_serving, carbs_per_serving, fiber_per_serving,
+			ingredients, steps, tags,
+			avg_rating, review_count, created_by, created_at, updated_at`
+
+	row := r.pool.QueryRow(ctx, query,
+		recipe.Source, recipe.SpoonacularID,
+		recipe.Title, recipe.Description, recipe.TitleRu, recipe.DescriptionRu,
+		recipe.Cuisine, recipe.Difficulty, recipe.PrepTimeMin, recipe.CookTimeMin, recipe.Servings, recipe.ImageURL,
+		recipe.CaloriesPerServing, recipe.ProteinPerServing, recipe.FatPerServing, recipe.CarbsPerServing, recipe.FiberPerServing,
+		recipe.Ingredients, recipe.Steps, recipe.Tags,
+	)
+	return scanRecipe(row)
+}
+
+// Count returns the total number of recipes.
+func (r *Repository) Count(ctx context.Context) (int, error) {
+	var n int
+	if err := r.pool.QueryRow(ctx, `SELECT count(*) FROM recipes`).Scan(&n); err != nil {
+		return 0, fmt.Errorf("count recipes: %w", err)
+	}
+	return n, nil
+}
+
+// ListUntranslated returns recipes without a Russian title, ordered by review_count DESC.
+func (r *Repository) ListUntranslated(ctx context.Context, limit, offset int) ([]*Recipe, error) {
+	query := `
+		SELECT id, source, spoonacular_id,
+			title, description, title_ru, description_ru,
+			cuisine, difficulty, prep_time_min, cook_time_min, servings, image_url,
+			calories_per_serving, protein_per_serving, fat_per_serving, carbs_per_serving, fiber_per_serving,
+			ingredients, steps, tags,
+			avg_rating, review_count, created_by, created_at, updated_at
+		FROM recipes
+		WHERE title_ru IS NULL AND source = 'spoonacular'
+		ORDER BY review_count DESC
+		LIMIT $1 OFFSET $2`
+
+	rows, err := r.pool.Query(ctx, query, limit, offset)
+	if err != nil {
+		return nil, fmt.Errorf("list untranslated recipes: %w", err)
+	}
+	defer rows.Close()
+	return collectRecipes(rows)
+}
+
+// UpdateTranslation saves the Russian title, description, and step translations.
+func (r *Repository) UpdateTranslation(ctx context.Context, id string, titleRu, descriptionRu *string, steps json.RawMessage) error {
+	query := `
+		UPDATE recipes SET
+			title_ru       = $2,
+			description_ru = $3,
+			steps          = $4,
+			updated_at     = now()
+		WHERE id = $1`
+
+	if _, err := r.pool.Exec(ctx, query, id, titleRu, descriptionRu, steps); err != nil {
+		return fmt.Errorf("update recipe translation %s: %w", id, err)
+	}
+	return nil
+}
+
+// --- helpers ---
+
+func scanRecipe(row pgx.Row) (*Recipe, error) {
+	var rec Recipe
+	var ingredients, steps, tags []byte
+
+	err := row.Scan(
+		&rec.ID, &rec.Source, &rec.SpoonacularID,
+		&rec.Title, &rec.Description, &rec.TitleRu, &rec.DescriptionRu,
+		&rec.Cuisine, &rec.Difficulty, &rec.PrepTimeMin, &rec.CookTimeMin, &rec.Servings, &rec.ImageURL,
+		&rec.CaloriesPerServing, &rec.ProteinPerServing, &rec.FatPerServing, &rec.CarbsPerServing, &rec.FiberPerServing,
+		&ingredients, &steps, &tags,
+		&rec.AvgRating, &rec.ReviewCount, &rec.CreatedBy, &rec.CreatedAt, &rec.UpdatedAt,
+	)
+	if err != nil {
+		return nil, err
+	}
+	rec.Ingredients = json.RawMessage(ingredients)
+	rec.Steps = json.RawMessage(steps)
+	rec.Tags = json.RawMessage(tags)
+	return &rec, nil
+}
+
+func collectRecipes(rows pgx.Rows) ([]*Recipe, error) {
+	var result []*Recipe
+	for rows.Next() {
+		var rec Recipe
+		var ingredients, steps, tags []byte
+		if err := rows.Scan(
+			&rec.ID, &rec.Source, &rec.SpoonacularID,
+			&rec.Title, &rec.Description, &rec.TitleRu, &rec.DescriptionRu,
+			&rec.Cuisine, &rec.Difficulty, &rec.PrepTimeMin, &rec.CookTimeMin, &rec.Servings, &rec.ImageURL,
+			&rec.CaloriesPerServing, &rec.ProteinPerServing, &rec.FatPerServing, &rec.CarbsPerServing, &rec.FiberPerServing,
+			&ingredients, &steps, &tags,
+			&rec.AvgRating, &rec.ReviewCount, &rec.CreatedBy, &rec.CreatedAt, &rec.UpdatedAt,
+		); err != nil {
+			return nil, fmt.Errorf("scan recipe: %w", err)
+		}
+		rec.Ingredients = json.RawMessage(ingredients)
+		rec.Steps = json.RawMessage(steps)
+		rec.Tags = json.RawMessage(tags)
+		result = append(result, &rec)
+	}
+	return result, rows.Err()
+}
+
+// GetByID returns a recipe by UUID.
+// Returns nil, nil if not found.
+func (r *Repository) GetByID(ctx context.Context, id string) (*Recipe, error) {
+	query := `
+		SELECT id, source, spoonacular_id,
+			title, description, title_ru, description_ru,
+			cuisine, difficulty, prep_time_min, cook_time_min, servings, image_url,
+			calories_per_serving, protein_per_serving, fat_per_serving, carbs_per_serving, fiber_per_serving,
+			ingredients, steps, tags,
+			avg_rating, review_count, created_by, created_at, updated_at
+		FROM recipes
+		WHERE id = $1`
+
+	row := r.pool.QueryRow(ctx, query, id)
+	rec, err := scanRecipe(row)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return nil, nil
+	}
+	return rec, err
+}