Initial commit

app/core/rag/nlp/synonym.py

@@ -0,0 +1,85 @@
+import logging
+import json
+import os
+import time
+import re
+from nltk.corpus import wordnet
+from app.core.rag.common.file_utils import get_project_base_directory
+
+
+class Dealer:
+    def __init__(self, redis=None):
+
+        self.lookup_num = 100000000
+        self.load_tm = time.time() - 1000000
+        self.dictionary = None
+        path = os.path.join(get_project_base_directory(), "app/core/rag/res", "synonym.json")
+        try:
+            self.dictionary = json.load(open(path, 'r'))
+            self.dictionary = { (k.lower() if isinstance(k, str) else k): v for k, v in self.dictionary.items() }
+        except Exception:
+            logging.warning("Missing synonym.json")
+            self.dictionary = {}
+
+        if not redis:
+            logging.warning(
+                "Realtime synonym is disabled, since no redis connection.")
+        if not len(self.dictionary.keys()):
+            logging.warning("Fail to load synonym")
+
+        self.redis = redis
+        self.load()
+
+    def load(self):
+        if not self.redis:
+            return
+
+        if self.lookup_num < 100:
+            return
+        tm = time.time()
+        if tm - self.load_tm < 3600:
+            return
+
+        self.load_tm = time.time()
+        self.lookup_num = 0
+        d = self.redis.get("kevin_synonyms")
+        if not d:
+            return
+        try:
+            d = json.loads(d)
+            self.dictionary = d
+        except Exception as e:
+            logging.error("Fail to load synonym!" + str(e))
+
+
+    def lookup(self, tk, topn=8):
+        if not tk or not isinstance(tk, str):
+            return []
+
+        # 1) Check the custom dictionary first (both keys and tk are already lowercase)
+        self.lookup_num += 1
+        self.load()
+        key = re.sub(r"[ \t]+", " ", tk.strip())
+        res = self.dictionary.get(key, [])
+        if isinstance(res, str):
+            res = [res]
+        if res:  # Found in dictionary → return directly
+            return res[:topn]
+
+        # 2) If not found and tk is purely alphabetical → fallback to WordNet
+        if re.fullmatch(r"[a-z]+", tk):
+            wn_set = {
+                re.sub("_", " ", syn.name().split(".")[0])
+                for syn in wordnet.synsets(tk)
+            }
+            wn_set.discard(tk)  # Remove the original token itself
+            wn_res = [t for t in wn_set if t]
+            return wn_res[:topn]
+
+        # 3) Nothing found in either source
+        return []
+    
+
+if __name__ == '__main__':
+    dl = Dealer()
+    print(dl.dictionary)