Add get_beatmaps.sh

bash/get_beatmaps.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+USERNAME=""
+PASSWORD=""
+
+COOKIES_FILE="cookies.txt"
+OUTPUT_FILE="data.json"
+PAGES_DIRECTORY="pages"
+
+LOGIN_URL="https://osu.ppy.sh/forum/ucp.php?mode=login"
+LOGIN_DATA="username=$USERNAME&password=$PASSWORD&login=login"
+
+PAGE_URL="https://osu.ppy.sh/p/beatmaplist?m=3&r=0&page="
+NR_PAGES=5
+
+rm $COOKIES_FILE
+rm $OUTPUT_FILE
+rm -rf $PAGES_DIRECTORY
+
+wget --save-cookies $COOKIES_FILE --keep-session-cookies --delete-after --post-data $LOGIN_DATA $LOGIN_URL
+seq $NR_PAGES | parallel "wget -P $PAGES_DIRECTORY --load-cookies $COOKIES_FILE '$PAGE_URL{}'"
+
+cat pages/* | pup 'script#json-beatmaps text{}' | sed '/^\s*$/d' | sed 's/$/,/' | sed '1s/^/\[ /' | sed '$s/,$/\]/' > $OUTPUT_FILE
+