feat: add script to extract solution description (doocs#2213)

Author: yanglbme

main.py

@@ -1,3 +1,4 @@
+from itertools import pairwise
 import os
 import re
 
@@ -24,7 +25,6 @@
 # 抽取代码块
 def extract_code():
     paths = []
-    suffixes = [suf for _, (_, suf) in code_block_dict.items()]
     for root, _, files in os.walk(os.getcwd()):
         for file in files:
             path = root + "/" + file
@@ -58,5 +58,66 @@ def extract_code():
                 cnt += 1
 
 
+def parse_content(content, start, end, titles):
+    i = content.find(start)
+    if i == -1:
+        return []
+    j = content.find(end)
+    if j == -1:
+        return []
+    content = content[i + len(start) : j]
+    blocks = []
+    idx = [content.find(title) for title in titles]
+    for l, r in pairwise(idx):
+        block = content[l:r].strip()
+        if not block:
+            continue
+        line = block.split("\n")[0]
+        method_name = line[2:-2]
+        block = block.replace(line, f"### {method_name}")
+        blocks.append(block)
+    return blocks
+
+
+def extract_solution_paragraph():
+    paths = []
+    for root, _, files in os.walk(os.getcwd()):
+        for file in files:
+            path = root + "/" + file
+            if "node_modules" in path or "__pycache__" in path or ".git" in path:
+                continue
+            if root == "D:\github-repo\leetcode":
+                continue
+            if path.endswith("README.md") or path.endswith("README_EN.md"):
+                paths.append(path)
+    for path in paths:
+        with open(path, "r", encoding="utf-8") as f:
+            content = f.read()
+
+        is_cn = path.endswith("README.md")
+        if is_cn:
+            blocks = parse_content(
+                content,
+                "## 解法",
+                "<!-- tabs:start -->",
+                ["**方法一：", "**方法二：", "**方法三：", "**方法四："],
+            )
+        else:
+            print(path)
+            blocks = parse_content(
+                content,
+                "## Solutions",
+                "<!-- tabs:start -->",
+                ["**Solution 1:", "**Solution 2:", "**Solution 3:", "**Solution 4:"],
+            )
+
+        if blocks:
+            prefix = path[: path.rfind("/")]
+            name = f"{prefix}/Solution.md" if is_cn else f"{prefix}/Solution_EN.md"
+            with open(name, "w", encoding="utf-8") as f:
+                f.write("\n\n".join(blocks))
+
+
 if __name__ == "__main__":
-    extract_code()
+    # extract_code()
+    extract_solution_paragraph()