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Update app.py
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app.py
CHANGED
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@@ -7,28 +7,27 @@ from fastapi import FastAPI
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from fastapi.responses import JSONResponse
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from pydantic import BaseModel
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# Lade RecipeBERT Modell
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bert_model_name = "alexdseo/RecipeBERT"
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bert_tokenizer = AutoTokenizer.from_pretrained(bert_model_name)
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bert_model = AutoModel.from_pretrained(bert_model_name)
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bert_model.eval()
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# Lade T5 Rezeptgenerierungsmodell
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MODEL_NAME_OR_PATH = "flax-community/t5-recipe-generation"
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t5_tokenizer = AutoTokenizer.from_pretrained(MODEL_NAME_OR_PATH, use_fast=True)
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t5_model = FlaxAutoModelForSeq2SeqLM.from_pretrained(MODEL_NAME_OR_PATH)
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# Token Mapping für die T5 Modell-Ausgabe
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special_tokens = t5_tokenizer.all_special_tokens
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tokens_map = {
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"<sep>": "--",
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"<section>": "\n"
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}
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# --- RecipeBERT-spezifische Funktionen (unverändert) ---
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def get_embedding(text):
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"""Berechnet das Embedding für einen Text mit Mean Pooling über alle Tokens
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inputs = bert_tokenizer(text, return_tensors="pt", truncation=True, padding=True)
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with torch.no_grad():
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outputs = bert_model(**inputs)
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@@ -39,82 +38,187 @@ def get_embedding(text):
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sum_mask = torch.clamp(input_mask_expanded.sum(1), min=1e-9)
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return (sum_embeddings / sum_mask).squeeze(0)
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def average_embedding(embedding_list):
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"""Berechnet den Durchschnitt einer Liste von Embeddings
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return tensors.mean(dim=0)
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def get_cosine_similarity(vec1, vec2):
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"""Berechnet die Cosinus-Ähnlichkeit zwischen zwei Vektoren
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if torch.is_tensor(vec1):
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vec1 = vec1.flatten()
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vec2 = vec2.flatten()
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dot_product = np.dot(vec1, vec2)
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norm_a = np.linalg.norm(vec1)
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norm_b = np.linalg.norm(vec2)
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if norm_a == 0 or norm_b == 0:
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return dot_product / (norm_a * norm_b)
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"""
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Findet die besten Zutaten
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"""
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required_ingredients = list(set(required_ingredients))
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available_ingredients = list(set([i for i in available_ingredients if i not in required_ingredients]))
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return {
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"title":
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"ingredients":
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"directions": [
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"Dies ist ein Testrezept.",
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"RecipeBERT und T5-Modell wurden beide erfolgreich geladen!",
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"Die Zutaten wurden mit RecipeBERT-Intelligenz ausgewählt.",
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f"Basierend auf deinen Eingaben wurde '{ingredients_list[-1]}' als ähnlichste Zutat hinzugefügt." if len(
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ingredients_list) > 1 else "Keine zusätzliche Zutat hinzugefügt."
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],
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"used_ingredients": ingredients_list
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}
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def process_recipe_request_logic(required_ingredients, available_ingredients, max_ingredients, max_retries):
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"""
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Kernlogik zur Verarbeitung einer Rezeptgenerierungsanfrage.
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@@ -125,9 +229,8 @@ def process_recipe_request_logic(required_ingredients, available_ingredients, ma
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optimized_ingredients = find_best_ingredients(
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required_ingredients, available_ingredients, max_ingredients
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)
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recipe =
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result = {
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'title': recipe['title'],
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'ingredients': recipe['ingredients'],
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@@ -138,21 +241,25 @@ def process_recipe_request_logic(required_ingredients, available_ingredients, ma
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except Exception as e:
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return {"error": f"Fehler bei der Rezeptgenerierung: {str(e)}"}
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# --- FastAPI-Implementierung ---
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app = FastAPI(title="AI Recipe Generator API
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class RecipeRequest(BaseModel):
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required_ingredients: list[str] = []
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available_ingredients: list[str] = []
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max_ingredients: int = 7
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max_retries: int = 5
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@app.post("/generate_recipe")
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async def generate_recipe_api(request_data: RecipeRequest):
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final_required_ingredients = request_data.required_ingredients
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if not final_required_ingredients and request_data.ingredients:
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final_required_ingredients = request_data.ingredients
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@@ -165,10 +272,11 @@ async def generate_recipe_api(request_data: RecipeRequest):
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)
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return JSONResponse(content=result_dict)
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@app.get("/")
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async def read_root():
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return {"message": "AI Recipe Generator API is running (
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print("INFO: FastAPI application script finished execution and defined 'app' variable.")
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from fastapi.responses import JSONResponse
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from pydantic import BaseModel
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# Lade RecipeBERT Modell (für semantische Zutat-Kombination)
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bert_model_name = "alexdseo/RecipeBERT"
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bert_tokenizer = AutoTokenizer.from_pretrained(bert_model_name)
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bert_model = AutoModel.from_pretrained(bert_model_name)
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bert_model.eval() # Setze das Modell in den Evaluationsmodus
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# Lade T5 Rezeptgenerierungsmodell
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MODEL_NAME_OR_PATH = "flax-community/t5-recipe-generation"
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t5_tokenizer = AutoTokenizer.from_pretrained(MODEL_NAME_OR_PATH, use_fast=True)
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t5_model = FlaxAutoModelForSeq2SeqLM.from_pretrained(MODEL_NAME_OR_PATH)
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# Token Mapping für die T5 Modell-Ausgabe
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special_tokens = t5_tokenizer.all_special_tokens
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tokens_map = {
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"<sep>": "--",
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"<section>": "\n"
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}
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# --- RecipeBERT-spezifische Funktionen ---
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def get_embedding(text):
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"""Berechnet das Embedding für einen Text mit Mean Pooling über alle Tokens"""
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inputs = bert_tokenizer(text, return_tensors="pt", truncation=True, padding=True)
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with torch.no_grad():
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outputs = bert_model(**inputs)
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sum_mask = torch.clamp(input_mask_expanded.sum(1), min=1e-9)
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return (sum_embeddings / sum_mask).squeeze(0)
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def average_embedding(embedding_list):
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"""Berechnet den Durchschnitt einer Liste von Embeddings"""
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# Sicherstellen, dass embedding_list Tupel von (Name, Embedding) enthält
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tensors = torch.stack([emb for _, emb in embedding_list])
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return tensors.mean(dim=0)
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def get_cosine_similarity(vec1, vec2):
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"""Berechnet die Cosinus-Ähnlichkeit zwischen zwei Vektoren"""
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if torch.is_tensor(vec1):
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vec1 = vec1.detach().numpy()
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if torch.is_tensor(vec2):
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vec2 = vec2.detach().numpy()
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vec1 = vec1.flatten()
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vec2 = vec2.flatten()
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dot_product = np.dot(vec1, vec2)
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norm_a = np.linalg.norm(vec1)
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norm_b = np.linalg.norm(vec2)
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if norm_a == 0 or norm_b == 0:
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return 0
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return dot_product / (norm_a * norm_b)
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def get_combined_scores(query_vector, embedding_list, all_good_embeddings, avg_weight=0.6):
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"""Berechnet einen kombinierten Score unter Berücksichtigung der Ähnlichkeit zum Durchschnitt und zu einzelnen Zutaten"""
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results = []
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for name, emb in embedding_list:
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avg_similarity = get_cosine_similarity(query_vector, emb)
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individual_similarities = [get_cosine_similarity(good_emb, emb)
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for _, good_emb in all_good_embeddings]
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avg_individual_similarity = sum(individual_similarities) / len(individual_similarities) if individual_similarities else 0
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combined_score = avg_weight * avg_similarity + (1 - avg_weight) * avg_individual_similarity
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results.append((name, emb, combined_score))
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results.sort(key=lambda x: x[2], reverse=True)
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return results
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# Die vollständige find_best_ingredients Funktion, die du bereitgestellt hast
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def find_best_ingredients(required_ingredients, available_ingredients, max_ingredients=6, avg_weight=0.6):
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"""
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Findet die besten Zutaten basierend auf RecipeBERT Embeddings.
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"""
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required_ingredients = list(set(required_ingredients))
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available_ingredients = list(set([i for i in available_ingredients if i not in required_ingredients]))
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if not required_ingredients and available_ingredients:
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random_ingredient = random.choice(available_ingredients)
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required_ingredients = [random_ingredient]
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available_ingredients = [i for i in available_ingredients if i != random_ingredient]
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print(f"No required ingredients provided. Randomly selected: {random_ingredient}")
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if not required_ingredients or len(required_ingredients) >= max_ingredients:
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return required_ingredients[:max_ingredients]
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if not available_ingredients:
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return required_ingredients
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embed_required = [(e, get_embedding(e)) for e in required_ingredients]
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embed_available = [(e, get_embedding(e)) for e in available_ingredients]
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num_to_add = min(max_ingredients - len(required_ingredients), len(available_ingredients))
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final_ingredients = embed_required.copy()
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for _ in range(num_to_add):
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avg = average_embedding(final_ingredients)
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candidates = get_combined_scores(avg, embed_available, final_ingredients, avg_weight)
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if not candidates:
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break
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best_name, best_embedding, _ = candidates[0]
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final_ingredients.append((best_name, best_embedding))
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embed_available = [item for item in embed_available if item[0] != best_name]
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return [name for name, _ in final_ingredients]
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def skip_special_tokens(text, special_tokens):
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"""Entfernt spezielle Tokens aus dem Text"""
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for token in special_tokens:
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text = text.replace(token, "")
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return text
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def target_postprocessing(texts, special_tokens):
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"""Post-processed generierten Text"""
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if not isinstance(texts, list):
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texts = [texts]
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new_texts = []
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for text in texts:
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text = skip_special_tokens(text, special_tokens)
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for k, v in tokens_map.items():
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text = text.replace(k, v)
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new_texts.append(text)
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return new_texts
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def validate_recipe_ingredients(recipe_ingredients, expected_ingredients, tolerance=0):
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"""
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Validiert, ob das Rezept ungefähr die erwarteten Zutaten enthält.
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"""
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recipe_count = len([ing for ing in recipe_ingredients if ing and ing.strip()])
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expected_count = len(expected_ingredients)
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return abs(recipe_count - expected_count) == tolerance
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def generate_recipe_with_t5(ingredients_list, max_retries=5):
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"""Generiert ein Rezept mit dem T5 Rezeptgenerierungsmodell mit Validierung."""
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original_ingredients = ingredients_list.copy()
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for attempt in range(max_retries):
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try:
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if attempt > 0:
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current_ingredients = original_ingredients.copy()
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random.shuffle(current_ingredients)
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else:
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current_ingredients = ingredients_list
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ingredients_string = ", ".join(current_ingredients)
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prefix = "items: "
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generation_kwargs = {
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"max_length": 512,
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"min_length": 64,
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"do_sample": True,
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"top_k": 60,
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"top_p": 0.95
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}
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print(f"Attempt {attempt + 1}: {prefix + ingredients_string}") # Debug-Print
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inputs = t5_tokenizer(
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prefix + ingredients_string,
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max_length=256,
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padding="max_length",
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truncation=True,
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return_tensors="jax"
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)
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output_ids = t5_model.generate(
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input_ids=inputs.input_ids,
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attention_mask=inputs.attention_mask,
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**generation_kwargs
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)
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generated = output_ids.sequences
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generated_text = target_postprocessing(
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t5_tokenizer.batch_decode(generated, skip_special_tokens=False),
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special_tokens
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)[0]
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recipe = {}
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sections = generated_text.split("\n")
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for section in sections:
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section = section.strip()
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if section.startswith("title:"):
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recipe["title"] = section.replace("title:", "").strip().capitalize()
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elif section.startswith("ingredients:"):
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ingredients_text = section.replace("ingredients:", "").strip()
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recipe["ingredients"] = [item.strip().capitalize() for item in ingredients_text.split("--") if item.strip()]
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elif section.startswith("directions:"):
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+
directions_text = section.replace("directions:", "").strip()
|
| 191 |
+
recipe["directions"] = [step.strip().capitalize() for step in directions_text.split("--") if step.strip()]
|
| 192 |
+
|
| 193 |
+
if "title" not in recipe:
|
| 194 |
+
recipe["title"] = f"Rezept mit {', '.join(current_ingredients[:3])}"
|
| 195 |
+
if "ingredients" not in recipe:
|
| 196 |
+
recipe["ingredients"] = current_ingredients
|
| 197 |
+
if "directions" not in recipe:
|
| 198 |
+
recipe["directions"] = ["Keine Anweisungen generiert"]
|
| 199 |
+
|
| 200 |
+
if validate_recipe_ingredients(recipe["ingredients"], original_ingredients):
|
| 201 |
+
print(f"Success on attempt {attempt + 1}: Recipe has correct number of ingredients") # Debug-Print
|
| 202 |
+
return recipe
|
| 203 |
+
else:
|
| 204 |
+
print(f"Attempt {attempt + 1} failed: Expected {len(original_ingredients)} ingredients, got {len(recipe['ingredients'])}") # Debug-Print
|
| 205 |
+
if attempt == max_retries - 1:
|
| 206 |
+
print("Max retries reached, returning last generated recipe") # Debug-Print
|
| 207 |
+
return recipe
|
| 208 |
+
except Exception as e:
|
| 209 |
+
print(f"Error in recipe generation attempt {attempt + 1}: {str(e)}") # Debug-Print
|
| 210 |
+
if attempt == max_retries - 1:
|
| 211 |
+
return {
|
| 212 |
+
"title": f"Rezept mit {original_ingredients[0] if original_ingredients else 'Zutaten'}",
|
| 213 |
+
"ingredients": original_ingredients,
|
| 214 |
+
"directions": ["Fehler beim Generieren der Rezeptanweisungen"]
|
| 215 |
+
}
|
| 216 |
return {
|
| 217 |
+
"title": f"Rezept mit {original_ingredients[0] if original_ingredients else 'Zutaten'}",
|
| 218 |
+
"ingredients": original_ingredients,
|
| 219 |
+
"directions": ["Fehler beim Generieren der Rezeptanweisungen"]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 220 |
}
|
| 221 |
|
|
|
|
| 222 |
def process_recipe_request_logic(required_ingredients, available_ingredients, max_ingredients, max_retries):
|
| 223 |
"""
|
| 224 |
Kernlogik zur Verarbeitung einer Rezeptgenerierungsanfrage.
|
|
|
|
| 229 |
optimized_ingredients = find_best_ingredients(
|
| 230 |
required_ingredients, available_ingredients, max_ingredients
|
| 231 |
)
|
| 232 |
+
# KORRIGIERT: Aufruf der echten T5-Generierungsfunktion
|
| 233 |
+
recipe = generate_recipe_with_t5(optimized_ingredients, max_retries)
|
|
|
|
| 234 |
result = {
|
| 235 |
'title': recipe['title'],
|
| 236 |
'ingredients': recipe['ingredients'],
|
|
|
|
| 241 |
except Exception as e:
|
| 242 |
return {"error": f"Fehler bei der Rezeptgenerierung: {str(e)}"}
|
| 243 |
|
|
|
|
| 244 |
# --- FastAPI-Implementierung ---
|
| 245 |
+
app = FastAPI(title="AI Recipe Generator API") # Ohne Gradio-spezifische Titelzusätze
|
|
|
|
| 246 |
|
| 247 |
class RecipeRequest(BaseModel):
|
| 248 |
required_ingredients: list[str] = []
|
| 249 |
available_ingredients: list[str] = []
|
| 250 |
max_ingredients: int = 7
|
| 251 |
max_retries: int = 5
|
| 252 |
+
# Optional: Für Abwärtskompatibilität, falls 'ingredients' als Top-Level-Feld gesendet wird
|
| 253 |
+
ingredients: list[str] = []
|
| 254 |
|
| 255 |
+
@app.post("/generate_recipe") # Der API-Endpunkt für Flutter
|
| 256 |
async def generate_recipe_api(request_data: RecipeRequest):
|
| 257 |
+
"""
|
| 258 |
+
Standard-REST-API-Endpunkt für die Flutter-App.
|
| 259 |
+
Nimmt direkt JSON-Daten an und gibt direkt JSON zurück.
|
| 260 |
+
"""
|
| 261 |
+
# Wenn required_ingredients leer ist, aber ingredients vorhanden sind,
|
| 262 |
+
# verwende ingredients für Abwärtskompatibilität.
|
| 263 |
final_required_ingredients = request_data.required_ingredients
|
| 264 |
if not final_required_ingredients and request_data.ingredients:
|
| 265 |
final_required_ingredients = request_data.ingredients
|
|
|
|
| 272 |
)
|
| 273 |
return JSONResponse(content=result_dict)
|
| 274 |
|
|
|
|
| 275 |
@app.get("/")
|
| 276 |
async def read_root():
|
| 277 |
+
return {"message": "AI Recipe Generator API is running (FastAPI only)!"} # Angepasste Nachricht
|
| 278 |
|
| 279 |
+
# Hier gibt es KEINEN Gradio-Mount oder Gradio-Launch-Befehl
|
| 280 |
+
# Das `app` Objekt ist eine reine FastAPI-Instanz
|
| 281 |
+
print("INFO: Pure FastAPI application script finished execution and defined 'app' variable.")
|
| 282 |
|
|
|