feat: create template with problem url and code snippet

create.sh

@@ -1,21 +1,42 @@
 #!/bin/bash
 
-num=$1
+id=$1
 
-echo "$num" | grep -q "^[1-9][0-9]\{,4\}$" || {
-    echo "Err: no valid number given" >&2
+echo "$id" | grep -q "^[1-9][0-9]\{,4\}$" || {
+    echo "Err: no valid problem ID provided." >&2
     exit 1
 }
 
-parent=$((num / 100))
-pdir="solutions/${parent}/q${num}"
+parent=$((id / 100))
+pdir="solutions/${parent}/q${id}"
 sol_file="${pdir}/solution.go"
 
 if [ -f "$sol_file" ]; then
     exit 0
 fi
 
-echo "Creating template for question No. $num" >&2
+title_slug=$(jq -r "select(.id == $id) | .titleSlug" ./problemset.jsonl)
+[ -n "$title_slug" ] || {
+    echo "Err: problem $id not found in the problem set." >&2
+    exit 1
+}
+problem_url="https://leetcode.com/problems/$title_slug/"
+
+echo -e "Creating template for problem \033[32m${id}: $title_slug\033[0m" >&2
 mkdir -pv "$pdir"
-echo "package q$num" > "$sol_file"
-echo "Created $sol_file"
+echo "// Package q$id implements a solution for $problem_url" > "$sol_file"
+echo -e "package q$id\n" >> "$sol_file"
+
+echo "Created: $sol_file"
+
+echo "Fetching code snippet for Go ..."
+curl -sSLf "${problem_url}description/" \
+    -H 'accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8' \
+    -H 'accept-language: en-US,en;q=0.5' \
+    -H 'user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36' \
+    | grep -o 'NEXT_DATA[^>]*>.*' \
+    | sed 's/^[^>]*>//;s/<\/script.*//' \
+    | jq -r '[ .props.pageProps.dehydratedState.queries[].state.data.question.codeSnippets | select( . != null) | .[] | select(.langSlug == "golang") ][0].code' \
+        >> "$sol_file"
+
+echo "Done."