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spiral_route.py
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spiral_route.py
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eol = '\n'
def collapse_matrix(matrix):
collapsed_matrix = eol.join(matrix)
return collapsed_matrix
def collate_matrix(matrix):
collated_matrix = []
max_rows = len(matrix) - 1
for row in range(max_rows):
collated_matrix.append(''.join(matrix[row]))
return collated_matrix
def shift_text(text, offset):
new_text = text[offset:] + text[0:offset]
return new_text
def sort_list(list, order="forward"):
sorted_list = list
if order == "forward":
sorted_list = sorted(list)
else:
list.reverse()
sorted_list = list
return sorted_list
def populate_spiral_row(snippet, row, column_list, matrix):
position = 0
#print(snippet, row, column_list)
for column in column_list:
matrix[row][column] = snippet[position]
position = position + 1
return matrix
def populate_spiral_column(snippet, row_list, column, matrix):
position = 0
for row in row_list:
matrix[row][column] = snippet[position]
position = position + 1
return matrix
def populate_matrix(text, rows, columns, direction="reading"):
pass
def spiral_route_cipher(original_text, rows, columns, direction = "counter-clockwise"):
text = original_text
rows_list = range(rows)
columns_list = range(columns)
text_cursor = 0
partial_matrix = [[' ' for x in range(columns)] for x in range(rows)]
if direction == "counter-clockwise":
while len(text) > text_cursor:
left = text[text_cursor:text_cursor + len(rows_list)]
rows_list = sort_list(rows_list, "forward")
columns_list = sort_list(columns_list, "forward")
if len(columns_list) > 0:
column = columns_list.pop(0)
text_cursor = text_cursor + len(rows_list)
#print(left, rows_list, column)
partial_matrix = populate_spiral_column(left, rows_list, column, partial_matrix)
if len(text) > text_cursor:
bottom = text[text_cursor:text_cursor + len(columns_list)]
rows_list = sort_list(rows_list, "reversed")
columns_list = sort_list(columns_list, "forward")
if len(rows_list) > 0:
row = rows_list.pop(0)
text_cursor = text_cursor + len(columns_list)
#print(bottom, row, columns_list)
partial_matrix = populate_spiral_row(bottom, row, columns_list, partial_matrix)
if len(text) > text_cursor:
right = text[text_cursor:text_cursor + len(rows_list)][::-1]
rows_list = sort_list(rows_list, "reversed")
columns_list = sort_list(columns_list, "reversed")
if len(columns_list) > 0:
column = columns_list.pop(0)
text_cursor = text_cursor + len(rows_list)
#print(right, rows_list, column)
partial_matrix = populate_spiral_column(right, rows_list, column, partial_matrix)
if len(text) > text_cursor:
top = text[text_cursor:text_cursor + len(columns_list)][::-1]
rows_list = sort_list(rows_list, "reversed")
columns_list = sort_list(columns_list, "reversed")
if len(rows_list) > 0:
row = rows_list.pop(-1)
text_cursor = text_cursor + len(columns_list)
#print(top, row, columns_list)
partial_matrix = populate_spiral_row(top, row, columns_list, partial_matrix)
return partial_matrix
def main():
text = '?OBKRUOXOGHULBSOLIFBBWFLRVQQPRNGKSSOTWTQSJQSSEKZZWATJKLUDIAWINFBNYPVTTMZFPKWGDKZXTJCDIGKUHUAUEKCAR'
rows = 7
columns = 14
for offset in range(0, len(text)):
shifted_text = shift_text(text, offset)
#new_matrix = ['' for x in range(rows)]
new_matrix = spiral_route_cipher(shifted_text, rows, columns, direction = "counter-clockwise")
matrix_collated_columns = collate_matrix(new_matrix)
matrix_collated_text = collapse_matrix(matrix_collated_columns)
print matrix_collated_text, eol
if __name__ == "__main__":
main()