COURSE=cs2521
TERM=26T1
BASE="https://cgi.cse.unsw.edu.au/~${COURSE}/${TERM}"

for path in lectures/slides/ lectures/ slides/ Lectures/ lecs/; do
  code=$(curl -s -o /dev/null -w "%{http_code}" "${BASE}/${path}")
  if [ "$code" = "200" ]; then
    count=$(curl -s "${BASE}/${path}" | grep -oi 'href="[^"]*\.pdf"' | wc -l)
    if [ "$count" -gt 0 ]; then
      echo "FOUND: ${path} (${count} PDFs)"
      break
    fi
  fi
done

SLIDE_PATH="lectures/slides/"  # from step 1
SAVE_DIR=~/UNSW/COMP2521/lectures/slides
mkdir -p "$SAVE_DIR"

curl -s "${BASE}/${SLIDE_PATH}" \
  | grep -o 'href="[^"]*\.pdf"' | sed 's/href="//;s/"$//' \
  | while read f; do
      echo "Downloading: $f"
      curl -s -o "${SAVE_DIR}/$f" "${BASE}/${SLIDE_PATH}$f"
    done

SAVE_DIR=~/UNSW/COMP2521/lectures/code
mkdir -p "$SAVE_DIR"

curl -s "${BASE}/lectures/code/" \
  | grep -o 'href="[^"]*/"' | sed 's/href="//;s/\/"$//' \
  | grep -v '^\.\|^\?' \
  | while read dir; do
      mkdir -p "${SAVE_DIR}/${dir}"
      curl -s -f -o "${SAVE_DIR}/${dir}/all.zip" \
        "${BASE}/lectures/code/${dir}/all.zip" 2>/dev/null && \
        echo "Downloaded: ${dir}/all.zip"
    done

SAVE_DIR=~/UNSW/COMP2521
mkdir -p "${SAVE_DIR}/tutorials" "${SAVE_DIR}/labs"

# Tutorials (week numbers vary by course)
for i in 1 2 3 4 5 7 8 9 10; do
  curl -s -f "${BASE}/tut/${i}/questions" -o "${SAVE_DIR}/tutorials/tut${i}.html" 2>/dev/null
done

# Labs
for i in 1 2 3 4 5 7 8 9 11 12 13 14 15 16 17; do
  curl -s -f "${BASE}/lab/${i}/questions" -o "${SAVE_DIR}/labs/lab${i}.html" 2>/dev/null
done

SAVE_DIR=~/UNSW/COMP2521
mkdir -p "${SAVE_DIR}/exams" "${SAVE_DIR}/guides"

curl -s -f "${BASE}/sample-exam" -o "${SAVE_DIR}/exams/sample-exam.html"
curl -s -f "${BASE}/style-guide" -o "${SAVE_DIR}/guides/style-guide.html"
curl -s -f "${BASE}/dsa-manual" -o "${SAVE_DIR}/guides/dsa-manual.html"

# Past exams
for t in 21T2 21T3 22T1 22T2 22T3 23T1 23T2 23T3 24T1 24T3 25T1 25T3; do
  curl -s -f "${BASE}/past-exam/${t}" -o "${SAVE_DIR}/exams/past-${t}.html" 2>/dev/null
done

# List videos in a playlist (no download)
yt-dlp --flat-playlist \
  --print "%(playlist_index)s. %(title)s (%(duration_string)s)" \
  "PLAYLIST_URL"

# Download full playlist (1080p video)
yt-dlp \
  -o '~/UNSW/COMP2521/lectures/videos/%(playlist_index)s-%(title)s.%(ext)s' \
  --format 'bestvideo[height<=1080]+bestaudio/best' \
  --write-subs --sub-langs en \
  --no-overwrites \
  "PLAYLIST_URL"

# Audio only (for commute listening)
yt-dlp \
  -o '~/UNSW/COMP2521/lectures/audio/%(playlist_index)s-%(title)s.%(ext)s' \
  --extract-audio --audio-format mp3 --audio-quality 128K \
  "PLAYLIST_URL"

COOKIES=~/UNSW/cookies.txt  # Netscape format

# Fetch course page
curl -s -b "$COOKIES" -L "https://webcms3.cse.unsw.edu.au/COMP2521/26T1/"

# Extract resource IDs
curl -s -b "$COOKIES" -L "https://webcms3.cse.unsw.edu.au/COMP2521/26T1/" \
  | grep -o '/resources/[0-9]*' | sort -u

# Fetch specific resource
curl -s -b "$COOKIES" -L "https://webcms3.cse.unsw.edu.au/COMP2521/26T1/resources/{ID}"

# Extract YouTube links from lectures page
curl -s -b "$COOKIES" -L "https://webcms3.cse.unsw.edu.au/COMP2521/26T1/" \
  | grep -o 'https://[^"]*youtube[^"]*' | sed 's/&/\&/g' | sort -u

~/UNSW/COMP{CODE}/
├── lectures/
│   ├── slides/              # PDF lecture slides
│   ├── code/                # Source code per week
│   │   ├── wk1-topic/
│   │   │   ├── all.zip
│   │   │   ├── solution/
│   │   │   └── starter/
│   │   └── ...
│   ├── revision/            # Revision exercise zips
│   ├── videos/              # YouTube recordings (via yt-dlp)
│   ├── audio/               # Audio-only versions
│   └── youtube-links.txt    # All YouTube URLs
├── tutorials/               # Tutorial question pages (HTML)
├── labs/                    # Lab question pages (HTML)
├── assignments/             # Assignment specs (HTML)
├── exams/                   # Past exams + sample exam (HTML)
├── guides/                  # Style guide, manuals
└── webcms-pages/            # Raw WebCMS3 pages (HTML)