Add scripts for obtaining/sending/displaying wikipedia descriptions

Add backend/data/enwiki/ directory containing scripts and instructive
READMEs. Adjust some other scripts to generate 'eol_ids' sqlite table
separate from 'names'. Make server respond to /data/desc requests,
and have client TileInfo component display response data.

Also adjust .gitignore entries to be root-relative.

1 files changed, 64 insertions, 0 deletions

diff --git a/backend/data/genEnwikiData.py b/backend/data/genEnwikiData.py
new file mode 100755
index 0000000..f1490b6
--- /dev/null
+++ b/backend/data/genEnwikiData.py
@@ -0,0 +1,64 @@
+#!/usr/bin/python3
+
+import sys, re
+import sqlite3
+
+usageInfo =  f"usage: {sys.argv[0]}\n"
+usageInfo += "Reads Wikimedia enwiki data from enwiki/, along with node and name data\n"
+usageInfo += "from a sqlite database, associates nodes with enwiki pages, and adds\n"
+usageInfo += "alt-name and description information for those nodes.\n"
+if len(sys.argv) > 1:
+	print(usageInfo, file=sys.stderr)
+	sys.exit(1)
+
+enwikiDb = "enwiki/enwikiData.db"
+dbFile = "data.db"
+
+# Open dbs
+enwikiCon = sqlite3.connect(enwikiDb)
+enwikiCur = enwikiCon.cursor()
+dbCon = sqlite3.connect(dbFile)
+dbCur = dbCon.cursor()
+# Find page id for each node name
+nodeToPageId = {}
+print("Getting node page-ids")
+iterationNum = 0
+for row in dbCur.execute("SELECT name from nodes"):
+	iterationNum += 1
+	if iterationNum % 1e4 == 0:
+		print("At iteration {}".format(iterationNum))
+	#
+	name = row[0]
+	row = enwikiCur.execute("SELECT id FROM pages where pages.title = ? COLLATE nocase", (name,)).fetchone()
+	if row != None:
+		nodeToPageId[name] = row[0]
+# Resolve redirects
+print("Resolving redirects")
+redirectingNames = set()
+iterationNum = 0
+for (name, pageId) in nodeToPageId.items():
+	iterationNum += 1
+	if iterationNum % 1e4 == 0:
+		print("At iteration {}".format(iterationNum))
+	#
+	row = enwikiCur.execute("SELECT target_id FROM redirects where redirects.id = ?", (pageId,)).fetchone()
+	if row != None:
+		nodeToPageId[name] = row[0]
+		redirectingNames.add(name)
+# Add descriptions for each node
+print("Adding node description data")
+dbCur.execute("CREATE TABLE descs (name TEXT PRIMARY KEY, desc TEXT, redirected INT)")
+iterationNum = 0
+for (name, pageId) in nodeToPageId.items():
+	iterationNum += 1
+	if iterationNum % 1e4 == 0:
+		print("At iteration {}".format(iterationNum))
+	#
+	row = enwikiCur.execute("SELECT desc FROM descs where descs.id = ?", (pageId,)).fetchone()
+	if row != None:
+		dbCur.execute("INSERT INTO descs VALUES (?, ?, ?)", (name, row[0], 1 if name in redirectingNames else 0))
+# Close dbs
+dbCon.commit()
+dbCon.close()
+enwikiCon.commit()
+enwikiCon.close()