From 9b4fd83e8f88858a7a8d440b129397561fb1fcac Mon Sep 17 00:00:00 2001
From: Terry Truong <terry06890@gmail.com>
Date: Tue, 10 May 2022 19:07:02 +1000
Subject: Split nodes table into nodes and edges

This noticeably slowed server responses. Responses to a client's initial
node query slowed from 20-30ms to 200-300ms.
---
 backend/server.py | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

(limited to 'backend/server.py')

diff --git a/backend/server.py b/backend/server.py
index 8e4a90f..f0292aa 100755
--- a/backend/server.py
+++ b/backend/server.py
@@ -28,25 +28,31 @@ dbCon.enable_load_extension(True)
 dbCon.load_extension('./data/spellfix')
 # Some functions
 def lookupNodes(names):
+	# Get node info
 	nodeObjs = {}
 	cur = dbCon.cursor()
-	# Get node info
-	query = "SELECT name, children, parent, tips, p_support FROM nodes WHERE" \
-		" name IN ({})".format(",".join(["?"] * len(names)))
-	namesForImgs = []
-	firstSubnames = {}
-	secondSubnames = {}
-	for row in cur.execute(query, names):
-		name = row[0]
-		nodeObj = {
-			"children": json.loads(row[1]),
-			"parent": None if row[2] == "" else row[2],
-			"tips": row[3],
-			"pSupport": True if row[4] == 1 else False,
+	query = "SELECT name, tips from nodes WHERE name IN ({})".format(",".join(["?"] * len(names)))
+	for (nodeName, tips) in cur.execute(query, names):
+		nodeObjs[nodeName] = {
+			"children": [],
+			"parent": None,
+			"tips": tips,
+			"pSupport": False,
 			"commonName": None,
 			"imgName": None,
 		}
-		# Check for image file
+	query = "SELECT node, child FROM edges WHERE node IN ({})".format(",".join(["?"] * len(names)))
+	for (nodeName, childName) in cur.execute(query, names):
+		nodeObjs[nodeName]["children"].append(childName)
+	query = "SELECT node, child, p_support FROM edges WHERE child IN ({})".format(",".join(["?"] * len(names)))
+	for (nodeName, childName, pSupport) in cur.execute(query, names):
+		nodeObjs[childName]["parent"] = nodeName
+		nodeObjs[childName]["pSupport"] = pSupport
+	# Get names for image files
+	namesForImgs = []
+	firstSubnames = {}
+	secondSubnames = {}
+	for (name, nodeObj) in nodeObjs.items():
 		match = re.fullmatch(r"\[(.+) \+ (.+)]", name)
 		if match == None:
 			namesForImgs.append(name)
@@ -56,8 +62,6 @@ def lookupNodes(names):
 			namesForImgs.extend([name1, name2])
 			firstSubnames[name1] = name
 			secondSubnames[name2] = name
-		# Add node object
-		nodeObjs[name] = nodeObj
 	# Get image names
 	query = "SELECT name, id FROM eol_ids WHERE" \
 		" name IN ({})".format(",".join(["?"] * len(namesForImgs)))
-- 
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