From 5fe71ea7b9d9a5d2dc6e8e5ce5b9193629eed74d Mon Sep 17 00:00:00 2001
From: Terry Truong <terry06890@gmail.com>
Date: Mon, 11 Jul 2022 01:54:08 +1000
Subject: Make backend dev server script serve the image files

Previously, image files in backend/data/img were moved to, or
symlinked from, public/. This needed to be changed before each
build, otherwise vite would end up copying gigabytes of images.
---
 backend/data/enwiki/genImgData.py | 190 --------------------------------------
 1 file changed, 190 deletions(-)
 delete mode 100755 backend/data/enwiki/genImgData.py

(limited to 'backend/data/enwiki/genImgData.py')

diff --git a/backend/data/enwiki/genImgData.py b/backend/data/enwiki/genImgData.py
deleted file mode 100755
index dedfe14..0000000
--- a/backend/data/enwiki/genImgData.py
+++ /dev/null
@@ -1,190 +0,0 @@
-#!/usr/bin/python3
-
-import sys, re
-import bz2, html, urllib.parse
-import sqlite3
-
-usageInfo = f"""
-Usage: {sys.argv[0]}
-
-For some set of page IDs, looks up their content in the wiki dump,
-and tries to parse infobox image names, storing them into a database.
-
-The program can be re-run with an updated set of page IDs, and
-will skip already-processed page IDs.
-"""
-if len(sys.argv) > 1:
-	print(usageInfo, file=sys.stderr)
-	sys.exit(1)
-
-def getInputPageIds():
-	pageIds = set()
-	dbCon = sqlite3.connect("../data.db")
-	dbCur = dbCon.cursor()
-	for (pageId,) in dbCur.execute("SELECT id from wiki_ids"):
-		pageIds.add(pageId)
-	dbCon.close()
-	return pageIds
-dumpFile = "enwiki-20220501-pages-articles-multistream.xml.bz2"
-indexDb = "dumpIndex.db"
-imgDb = "imgData.db" # The database to create
-idLineRegex = re.compile(r"<id>(.*)</id>")
-imageLineRegex = re.compile(r".*\| *image *= *([^|]*)")
-bracketImageRegex = re.compile(r"\[\[(File:[^|]*).*]]")
-imageNameRegex = re.compile(r".*\.(jpg|jpeg|png|gif|tiff|tif)", flags=re.IGNORECASE)
-cssImgCropRegex = re.compile(r"{{css image crop\|image *= *(.*)", flags=re.IGNORECASE)
-# In testing, got about 360k image names
-
-print("Getting input page-ids")
-pageIds = getInputPageIds()
-print(f"Found {len(pageIds)}")
-
-print("Opening databases")
-indexDbCon = sqlite3.connect(indexDb)
-indexDbCur = indexDbCon.cursor()
-imgDbCon = sqlite3.connect(imgDb)
-imgDbCur = imgDbCon.cursor()
-print("Checking tables")
-if imgDbCur.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='page_imgs'").fetchone() == None:
-	# Create tables if not present
-	imgDbCur.execute("CREATE TABLE page_imgs (page_id INT PRIMARY KEY, img_name TEXT)") # img_name may be NULL
-	imgDbCur.execute("CREATE INDEX page_imgs_idx ON page_imgs(img_name)")
-else:
-	# Check for already-processed page IDs
-	numSkipped = 0
-	for (pid,) in imgDbCur.execute("SELECT page_id FROM page_imgs"):
-		if pid in pageIds:
-			pageIds.remove(pid)
-			numSkipped += 1
-		else:
-			print(f"WARNING: Found already-processed page ID {pid} which was not in input set")
-	print(f"Will skip {numSkipped} already-processed page IDs")
-
-print("Getting dump-file offsets")
-offsetToPageids = {}
-offsetToEnd = {} # Maps chunk-start offsets to their chunk-end offsets
-iterNum = 0
-for pageId in pageIds:
-	iterNum += 1
-	if iterNum % 1e4 == 0:
-		print(f"At iteration {iterNum}")
-	#
-	query = "SELECT offset, next_offset FROM offsets WHERE id = ?"
-	row = indexDbCur.execute(query, (pageId,)).fetchone()
-	if row == None:
-		print(f"WARNING: Page ID {pageId} not found")
-		continue
-	(chunkOffset, endOffset) = row
-	offsetToEnd[chunkOffset] = endOffset
-	if chunkOffset not in offsetToPageids:
-		offsetToPageids[chunkOffset] = []
-	offsetToPageids[chunkOffset].append(pageId)
-print(f"Found {len(offsetToEnd)} chunks to check")
-
-print("Iterating through chunks in dump file")
-def getImageName(content):
-	" Given an array of text-content lines, tries to return an infoxbox image name, or None "
-	# Doesn't try and find images in outside-infobox [[File:...]] and <imagemap> sections
-	for line in content:
-		match = imageLineRegex.match(line)
-		if match != None:
-			imageName = match.group(1).strip()
-			if imageName == "":
-				return None
-			imageName = html.unescape(imageName)
-			# Account for {{...
-			if imageName.startswith("{"):
-				match = cssImgCropRegex.match(imageName)
-				if match == None:
-					return None
-				imageName = match.group(1)
-			# Account for [[File:...|...]]
-			if imageName.startswith("["):
-				match = bracketImageRegex.match(imageName)
-				if match == None:
-					return None
-				imageName = match.group(1)
-			# Account for <!--
-			if imageName.find("<!--") != -1:
-				return None
-			# Remove an initial 'File:'
-			if imageName.startswith("File:"):
-				imageName = imageName[5:]
-			# Remove an initial 'Image:'
-			if imageName.startswith("Image:"):
-				imageName = imageName[6:]
-			# Check for extension
-			match = imageNameRegex.match(imageName)
-			if match != None:
-				imageName = match.group(0)
-				imageName = urllib.parse.unquote(imageName)
-				imageName = html.unescape(imageName) # Intentionally unescaping again (handles some odd cases)
-				imageName = imageName.replace("_", " ")
-				return imageName
-			# Exclude lines like: | image = &lt;imagemap&gt;
-			return None
-	return None
-with open(dumpFile, mode='rb') as file:
-	iterNum = 0
-	for (pageOffset, endOffset) in offsetToEnd.items():
-		iterNum += 1
-		if iterNum % 100 == 0:
-			print(f"At iteration {iterNum}")
-		#
-		pageIds = offsetToPageids[pageOffset]
-		# Jump to chunk
-		file.seek(pageOffset)
-		compressedData = file.read(None if endOffset == -1 else endOffset - pageOffset)
-		data = bz2.BZ2Decompressor().decompress(compressedData).decode()
-		# Look in chunk for pages
-		lines = data.splitlines()
-		lineIdx = 0
-		while lineIdx < len(lines):
-			# Look for <page>
-			if lines[lineIdx].lstrip() != "<page>":
-				lineIdx += 1
-				continue
-			# Check page id
-			lineIdx += 3
-			idLine = lines[lineIdx].lstrip()
-			match = idLineRegex.fullmatch(idLine)
-			if match == None or int(match.group(1)) not in pageIds:
-				lineIdx += 1
-				continue
-			pageId = int(match.group(1))
-			lineIdx += 1
-			# Look for <text> in <page>
-			foundText = False
-			while lineIdx < len(lines):
-				if not lines[lineIdx].lstrip().startswith("<text "):
-					lineIdx += 1
-					continue
-				foundText = True
-				# Get text content
-				content = []
-				line = lines[lineIdx]
-				content.append(line[line.find(">") + 1:])
-				lineIdx += 1
-				foundTextEnd = False
-				while lineIdx < len(lines):
-					line = lines[lineIdx]
-					if not line.endswith("</text>"):
-						content.append(line)
-						lineIdx += 1
-						continue
-					foundTextEnd = True
-					content.append(line[:line.rfind("</text>")])
-					# Look for image-filename
-					imageName = getImageName(content)
-					imgDbCur.execute("INSERT into page_imgs VALUES (?, ?)", (pageId, imageName))
-					break
-				if not foundTextEnd:
-					print(f"WARNING: Did not find </text> for page id {pageId}")
-				break
-			if not foundText:
-				print(f"WARNING: Did not find <text> for page id {pageId}")
-
-print("Closing databases")
-indexDbCon.close()
-imgDbCon.commit()
-imgDbCon.close()
-- 
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