From ccc7567b1a9cd8942ea6dd5ba515da24bdfd7059 Mon Sep 17 00:00:00 2001
From: Fynn Petersen-Frey <fynn.petersen-frey@uni-hamburg.de>
Date: Tue, 14 May 2024 11:48:39 +0000
Subject: [PATCH] qdant client

---
 backend/src/app/core/search/qdrant_service.py | 162 ++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 backend/src/app/core/search/qdrant_service.py

diff --git a/backend/src/app/core/search/qdrant_service.py b/backend/src/app/core/search/qdrant_service.py
new file mode 100644
index 000000000..c87449447
--- /dev/null
+++ b/backend/src/app/core/search/qdrant_service.py
@@ -0,0 +1,162 @@
+from typing import List, Tuple
+
+import numpy as np
+from qdrant_client import QdrantClient
+from qdrant_client.conversions.common_types import VectorParams, Distance
+from app.core.data.dto.search import SimSearchSentenceHit
+from app.preprocessing.ray_model_service import RayModelService
+from app.preprocessing.ray_model_worker.dto.clip import ClipTextEmbeddingInput
+from app.util.singleton_meta import SingletonMeta
+from config import conf
+from loguru import logger
+
+
+class QdrantService(metaclass=SingletonMeta):
+    def __new__(cls, *args, **kwargs):
+        cls._sentence_class_name = "Sentence"
+        cls._document_class_name = "Document"
+        cls._colletions = [cls._sentence_class_name, cls._document_class_name]
+
+        try:
+            cls._client = QdrantClient(
+                host=conf.qdrant.host,
+                port=conf.qdrant.port,
+                grpc_port=conf.qdrant.crpc_port,
+                prefer_grpc=True,
+            )
+            collections = {c[0] for c in cls._client.get_collections()}
+            if kwargs["flush"] if "flush" in kwargs else False:
+                logger.warning("Flushing DWTS Qdrant Data!")
+                for c in collections:
+                    cls._client.delete_collection(c)
+            for name in cls._colletions.items():
+                if name not in collections:
+                    cls._client.create_collection(
+                        name,
+                        vectors_config=VectorParams(size=512, distance=Distance.COSINE),
+                    )
+
+        except Exception as e:
+            msg = f"Cannot connect or initialize to Qdrant DB - Error '{e}'"
+            logger.error(msg)
+            raise SystemExit(msg)
+
+        cls.rms = RayModelService()
+
+        return super(QdrantService, cls).__new__(cls)
+
+    def add_text_sdoc_to_index(
+        self,
+        proj_id: int,
+        sdoc_id: int,
+        sentences: List[str],
+    ) -> None:
+        sentence_embs = self.rms.clip_text_embedding(
+            ClipTextEmbeddingInput(text=sentences)
+        ).numpy()
+
+        # create cheap&easy (but suboptimal) document embeddings for now
+        doc_emb = sentence_embs.sum(axis=0)
+        doc_emb /= np.linalg.norm(doc_emb)
+
+        logger.debug(
+            f"Adding {len(sentence_embs)} sentences "
+            f"from SDoc {sdoc_id} in Project {proj_id} to Qdrant ..."
+        )
+        sents = [
+            {
+                "id": f"{proj_id}-{sdoc_id}-{sent_id}",
+                "project_id": proj_id,
+                "sdoc_id": sdoc_id,
+                "sentence_id": sent_id,
+                "text": sentences[sent_id],
+                "vec": sent_emb.tolist(),
+            }
+            for sent_id, sent_emb in enumerate(sentence_embs)
+        ]
+        res = self._client.collections[self._sentence_class_name].documents.import_(
+            sents, {"action": "create"}
+        )
+        print(res)
+        print("added sentences to TS", len(sents))
+        documents = [
+            {
+                "id": f"{proj_id}-{sdoc_id}",
+                "project_id": proj_id,
+                "sdoc_id": sdoc_id,
+                "text": " ".join(sentences),
+                "vec": doc_emb.tolist(),
+            }
+        ]
+        self._client.collections[self._document_class_name].documents.import_(
+            documents, {"action": "create"}
+        )
+
+    def remove_text_sdoc_from_index(self, sdoc_id: int) -> None:
+        logger.debug(f"Removing text SDoc {sdoc_id} from Index!")
+        for name in self._colletions.keys():
+            self._client.collections[name].documents.delete(
+                {"filter_by": f"sdoc_id:={sdoc_id}"}
+            )
+
+    def remove_all_project_embeddings(
+        self,
+        proj_id: int,
+    ) -> None:
+        for name in self._colletions.keys():
+            self._client.collections[name].documents.delete(
+                {"filter_by": f"project_id:={proj_id}"}
+            )
+
+    def suggest_similar_sentences(
+        self, proj_id: int, sdoc_sent_ids: List[Tuple[int, int]]
+    ) -> List[SimSearchSentenceHit]:
+        return self.__suggest(proj_id, sdoc_sent_ids)
+
+    def __suggest(
+        self,
+        proj_id: int,
+        sdoc_sent_ids: List[Tuple[int, int]],
+        top_k: int = 10,
+        threshold: float = 0.0,
+    ) -> List[SimSearchSentenceHit]:
+        candidates: List[SimSearchSentenceHit] = []
+        vc = "vector_query"
+        queries = [
+            {vc: f"vec:([], id: {proj_id}-{sdoc_id}-{sent_id}, k:1)"}
+            for sdoc_id, sent_id in sdoc_sent_ids
+        ]
+
+        res = self._client.multi_search.perform(
+            {"searches": queries},
+            {
+                "collection": self._sentence_class_name,
+                "q": "*",
+                "filter_by": f"project_id:= {proj_id}",
+                "include_fields": "id,sdoc_id,sentence_id",
+            },
+        )
+
+        for r in res["results"]:
+            for hit in r["hits"]:
+                candidates.append(
+                    SimSearchSentenceHit(
+                        sdoc_id=hit["document"]["sdoc_id"],
+                        score=hit["vector_distance"],
+                        sentence_id=hit["document"]["sentence_id"],
+                    )
+                )
+
+        candidates.sort(key=lambda x: (x.sdoc_id, x.sentence_id))
+        hits = self.__unique_consecutive(candidates)
+        hits = [h for h in hits if (h.sdoc_id, h.sentence_id) not in sdoc_sent_ids]
+        return hits
+
+    def __unique_consecutive(self, hits: List[SimSearchSentenceHit]):
+        result = []
+        current = SimSearchSentenceHit(sdoc_id=-1, sentence_id=-1, score=0.0)
+        for hit in hits:
+            if hit.sdoc_id != current.sdoc_id or hit.sentence_id != current.sentence_id:
+                current = hit
+                result.append(hit)
+        return result