2 files changed, 100 insertions, 0 deletions
diff --git a/config.json b/config.json
new file mode 100644
index 0000000..76a6151
--- /dev/null
+++ b/config.json
@@ -0,0 +1,31 @@
+{
+    "languages": {
+        "python": {
+            "extension": "py",
+            "comment" : {
+                "top": "###",
+                "prefix" : "# ",
+                "bottom": "###"
+            }
+        },
+        "haskell": {
+            "extension": "hs",
+            "comment" : {
+                "top": "----",
+                "prefix" : "-- ",
+                "bottom": "----"
+            }
+        },
+        "c": {
+            "extension": "c",
+            "comment" : {
+                "top": "/*",
+                "prefix" : "* ",
+                "bottom": "*/"
+            }
+        }
+    },
+    "url_format": "https://projecteuler.net/problem={index}",
+    "line_wrap": 89,
+    "problem_padding": 2
+}
diff --git a/generate.py b/generate.py
new file mode 100644
index 0000000..409af8a
--- /dev/null
+++ b/generate.py
@@ -0,0 +1,69 @@
+import requests
+import json
+from bs4 import BeautifulSoup
+from argparse import ArgumentParser
+
+
+CONFIG_FILENAME = 'config.json'
+
+def parse_args(languages):
+    parser = ArgumentParser(description='Problem file generator')
+    parser.add_argument('indexes', nargs='+', type=int,
+                        help='problems indexes for which files are generated')
+    parser.add_argument('-l', '--language', choices=languages, required=True,
+                        help='the file programming language')
+    return vars(parser.parse_args())
+
+def read_config():
+    try:
+        with open(CONFIG_FILENAME, 'r') as file:
+            config = json.load(file)
+    except FileNotFoundError:
+        print(f'Error: file {CONFIG_FILENAME} not found')
+        exit(1)
+    return config
+
+
+def write_problem(index, title, sub_title, content, language_config):
+    text = '\n'.join([language_config['comment']['top'], title, sub_title, content,
+                      language_config['comment']['bottom']])
+    text = '\n'.join([language_config['comment']['prefix']
+                      + line for line in text.split('\n')])
+    slug = ''.join([c for c in title.lower().replace(' ', '_') if c.isalpha() or
+                    c.isdigit() or c == '_'])
+    filename = (str(index).zfill(3) + '-'
+                + slug + '.' + language_config['extension'])
+    try:
+        with open(filename, 'w') as file:
+            file.write(text)
+        print(f'{filename} created')
+    except:
+        print(f'Error: could not create file {filename}')
+
+
+def fetch_problem(index, config, args):
+    url = config['url_format'].format(index=index)
+
+    print(f"fetching problem {index} at {url}...")
+    data = requests.get(url)
+    soup = BeautifulSoup(data.text, 'html.parser')
+
+    print('parsing data...')
+    data = soup.find('div', {'id': 'content'})
+    problem_title = data.h2.text
+    problem_sub_title = data.h3.text
+    problem_data = soup.find('div', {'class': 'problem_content'})
+
+    print('\nTitle:', problem_title)
+    print('Sub title:', problem_sub_title)
+    print('Text:', problem_data.text, '\n')
+
+    write_problem(index, problem_title, problem_sub_title, problem_data.text,
+                  config['languages'][args['language']])
+
+
+if __name__ == '__main__':
+    config = read_config()
+    args = parse_args(config['languages'].keys())
+    for p in args['indexes']:
+        fetch_problem(p, config, args)