From e113584029b3e7680edbf1cbf54ad77b3a2d5a71 Mon Sep 17 00:00:00 2001
From: ohzakka <ohzakka@gmail.com>
Date: Sat, 17 Aug 2019 21:45:00 +0900
Subject: [PATCH 1/3] add maybe_useless code

---
 maybe_useless.py | 103 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 maybe_useless.py

diff --git a/maybe_useless.py b/maybe_useless.py
new file mode 100644
index 0000000..63e981c
--- /dev/null
+++ b/maybe_useless.py
@@ -0,0 +1,103 @@
+from copy import deepcopy, copy
+import random
+import sys
+import traceback
+
+
+class CommandError(SyntaxError): pass
+
+
+def print_help():
+    print('''
+Usage: python shuffle_me.py [option]
+--unit -u\tchar | line
+\tchar\tshuffle or sort each characters
+\tline\tshuffle or sort each lines
+--type -t\tsort | shuffle
+\tsort\tremake source to sorting with unicode(utf-8)
+\tshuffle\tremake source to randomly shuffle
+--help -h\tShow usage message
+                ''')
+
+
+def get_conf():
+    args = copy(sys.argv)
+    options = {'this_file': args[0]}
+
+    if '--unit' not in args or '-u' not in args:
+        options['unit'] = 'char'
+    if '--type' not in args or '-t' not in args:
+        options['type'] = 'shuffle'
+
+    for idx, arg in enumerate(args):
+        if 'unit' not in options.keys() and arg == '--unit' or arg == '-u':
+            options['unit'] = args[idx + 1]
+        elif 'type' not in options.keys() and arg == '--type' or arg == '-t':
+            options['type'] = args[idx + 1]
+        elif arg == '--help' or arg == '-h':
+            print_help()
+            exit(0)
+
+    return options
+
+
+def read_code(filename):
+    rp = open(filename, 'rb')
+    org_code = deepcopy(rp.read()).decode('utf-8')
+    rp.close()
+
+    return org_code
+
+
+def write_code(new_code, filename):
+    new_code = ''.join(new_code).encode('utf-8')
+    wp = open(filename, 'wb')
+    wp.write(new_code)
+    wp.close()
+
+
+def make_sequence_from_source(org_source, unit):
+    if unit == 'char':
+        org_source = list(org_source)
+    elif unit == 'line':
+        sep = '\r\n' if '\r\n' in org_source else '\n'
+        org_source = org_source.split(sep)
+    else:
+        raise CommandError('Wrong command!!')
+
+    return org_source
+
+
+def do_func(org_seq_source, func):
+    processed_code = copy(org_seq_source)
+    if func == 'sort':
+        processed_code.sort()
+    elif func == 'shuffle':
+        random.shuffle(processed_code)
+    else:
+        raise CommandError('Wrong command!!')
+
+    return processed_code
+
+
+def main():
+    # 명령절에서 옵션을 받아온다.
+    config = get_conf()
+    # 자신의 소스코드를 읽어온다.
+    code = read_code(config['this_file'])
+    # 읽어온 소스코드를 주어진 단위로 쪼갠다.
+    code = make_sequence_from_source(code, config['unit'])
+    # 만들어진 코드 리스트 단위를 주어진 방법으로 바꾼다.
+    code = do_func(code, config['type'])
+    # 다시 자신의 소스코드에 덮어씌운다.
+    write_code(code, config['this_file'])
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except CommandError as e:
+        print(str(e))
+        print_help()
+    except Exception as e:
+        traceback.print_tb(e)

From 2e4b41c1af726d4344c3d21d14df83dc043c252c Mon Sep 17 00:00:00 2001
From: Jeffrey Oh <aroh@madup.com>
Date: Sat, 17 Aug 2019 21:57:18 +0900
Subject: [PATCH 2/3] Rename maybe_useless.py to shuffle_me.py

---
 maybe_useless.py => shuffle_me.py | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename maybe_useless.py => shuffle_me.py (100%)

diff --git a/maybe_useless.py b/shuffle_me.py
similarity index 100%
rename from maybe_useless.py
rename to shuffle_me.py

From 8b64d29f1e47bb3b8269fd0f916b43f978ab87ee Mon Sep 17 00:00:00 2001
From: ohzakka <ohzakka@gmail.com>
Date: Sat, 17 Aug 2019 22:13:38 +0900
Subject: [PATCH 3/3] fix: support line separate symbols and add comments

---
 maybe_useless.py | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/maybe_useless.py b/maybe_useless.py
index 63e981c..608efbf 100644
--- a/maybe_useless.py
+++ b/maybe_useless.py
@@ -2,6 +2,7 @@
 import random
 import sys
 import traceback
+import os
 
 
 class CommandError(SyntaxError): pass
@@ -49,8 +50,14 @@ def read_code(filename):
     return org_code
 
 
-def write_code(new_code, filename):
-    new_code = ''.join(new_code).encode('utf-8')
+def write_code(new_code, filename, unit):
+    if unit == 'line':
+        # If unit is line, new_code's elements does not have new line symbol
+        join_token = os.linesep
+    else:
+        # If unit is char, new line symbol is element of new_code
+        join_token = ''
+    new_code = join_token.join(new_code).encode('utf-8')
     wp = open(filename, 'wb')
     wp.write(new_code)
     wp.close()
@@ -60,7 +67,18 @@ def make_sequence_from_source(org_source, unit):
     if unit == 'char':
         org_source = list(org_source)
     elif unit == 'line':
-        sep = '\r\n' if '\r\n' in org_source else '\n'
+        if '\r\n' in org_source:
+            # For windows or ms-dos
+            sep = '\r\n'
+        elif '\n' in org_source:
+            # For linux ox
+            sep = '\n'
+        elif '\r' in org_source:
+            # For unix or osx or somethings..
+            sep = '\r'
+        else:
+            # I don't know what did I support any new line symbol
+            raise SyntaxError('Not supported new line symbol.')
         org_source = org_source.split(sep)
     else:
         raise CommandError('Wrong command!!')
@@ -90,7 +108,7 @@ def main():
     # 만들어진 코드 리스트 단위를 주어진 방법으로 바꾼다.
     code = do_func(code, config['type'])
     # 다시 자신의 소스코드에 덮어씌운다.
-    write_code(code, config['this_file'])
+    write_code(code, config['this_file'], config['unit'])
 
 
 if __name__ == "__main__":