From dc45b56759e38da793f8976c94b6a798096c968e Mon Sep 17 00:00:00 2001
From: Oscar Najera <hi@oscarnajera.com>
Date: Wed, 29 Nov 2023 04:21:37 +0100
Subject: Semantic search server and client

---
 scratch/semgrep/server.py | 92 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 scratch/semgrep/server.py

(limited to 'scratch/semgrep/server.py')

diff --git a/scratch/semgrep/server.py b/scratch/semgrep/server.py
new file mode 100644
index 0000000..6a8648b
--- /dev/null
+++ b/scratch/semgrep/server.py
@@ -0,0 +1,92 @@
+#!/usr/bin/env python3
+from http.server import BaseHTTPRequestHandler, HTTPServer
+import chromadb
+import collections
+import hashlib
+import json
+
+
+def checksum(string):
+    sha256 = hashlib.sha256()
+    sha256.update(string.encode("utf-8"))
+    return sha256.hexdigest()[:32]
+
+
+def ensure_list(data):
+    if isinstance(data, str):
+        return [data]
+    if isinstance(data, list):
+        if all(isinstance(l, str) for l in data):
+            return data
+    raise ValueError("Data must be a list of strings")
+
+
+class MyRequestHandler(BaseHTTPRequestHandler):
+    def do_POST(self):
+        content_length = int(self.headers["Content-Length"])
+        post_data = self.rfile.read(content_length).decode("utf-8")
+
+        try:
+            data = json.loads(post_data)
+            # Process the JSON data
+            response_message = f"Received POST request with data: '{data}'\n"
+        except ValueError:
+            response_message = "Invalid JSON data"
+            self.send_response(400)
+
+        if query := data.get("query"):
+            response = collection.query(query_texts=ensure_list(query))
+        elif paragraph := data.get("store"):
+            data, metadata = drop_duplicates(paragraph)
+            collection.add(
+                documents=data, metadatas=metadata, ids=[checksum(l) for l in data]
+            )
+            response = {"added": data}
+        else:
+            raise ValueError(f"Used wrong method. Sent: {data.keys()}")
+
+        response_message = json.dumps(response)
+
+        self.send_response(200)
+        self.send_header("Content-type", "text/plain")
+        self.end_headers()
+        self.wfile.write(response_message.encode("utf-8"))
+
+
+def run_server(port=8080):
+    server_address = ("", port)
+    httpd = HTTPServer(server_address, MyRequestHandler)
+    print(f"Server running on port {port}")
+    httpd.serve_forever()
+
+
+def drop_duplicates(paragraph):
+    data = [data["document"] for data in paragraph]
+    metadata = [data["metadata"] for data in paragraph]
+    dups = (x for x, count in collections.Counter(data).items() if count > 1)
+    to_drop = []
+    for no in dups:
+        to_drop.extend([i for i, d in enumerate(data) if d == no][1:])
+    to_drop.sort(reverse=True)
+    for index in to_drop:
+        data.pop(index)
+        metadata.pop(index)
+    return data, metadata
+
+
+def test():
+    sample = [
+        {"document": "Hello", "metadata": 5},
+        {"document": "World", "metadata": 8},
+        {"document": "Hello", "metadata": 6},
+        {"document": "Good", "metadata": 3},
+        {"document": "World", "metadata": 9},
+    ]
+
+    assert drop_duplicates(sample) == (["Hello", "World", "Good"], [5, 8, 3])
+
+
+if __name__ == "__main__":
+    client = chromadb.PersistentClient(path="./semgrep")
+    collection = client.get_or_create_collection("org-roam")
+    run_server()
-- 
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