crosswords/server/crossword.py

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Python
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import enum
import json
import logging
import numpy as np
from . import crossword_generator
from enum import Enum
import traceback
class HintOrientation(Enum):
VERTICAL = 0
HORIZONTAL = 1
BOTH = 2
class FieldType(Enum):
EMPTY = 0
HINT = 1
LETTER = 2
class Field(object):
def __init__(self, field_type: FieldType = FieldType.EMPTY):
self._field_type = field_type
def get_type(self) -> FieldType:
return self._field_type
def get_content(self) -> str:
return None
def serialize(self):
type_names = {
FieldType.EMPTY: "empty",
FieldType.HINT: "hint",
FieldType.LETTER: "letter"
}
return {
'cell_type': type_names[self._field_type]
}
class HintField(Field):
def __init__(self, horizontal_hint: str = None, vertical_hint: str = None):
super().__init__(field_type=FieldType.HINT)
self._horizontal_hint = horizontal_hint
self._vertical_hint = vertical_hint
def get_horizontal_hint(self) -> str:
return self._horizontal_hint
def get_vertical_hint(self) -> str:
return self._vertical_hint
def set_horizintal_hint(self, hint: str):
self._horizontal_hint = hint
def set_vertical_hint(self, hint: str):
self._vertical_hint = hint
def serialize(self):
result = super().serialize()
result['vertical_hint'] = self._vertical_hint
result['horizontal_hint'] = self._horizontal_hint
return result
class LetterField(Field):
def __init__(self, letter: str):
assert len(letter) <= 1
super().__init__(field_type=FieldType.LETTER)
self._letter = letter.lower()
self._revealed = False
self._user_letter = ""
def get_content(self) -> str:
return self._letter.upper()
def get_user_content(self) -> str:
return self._user_letter.upper()
def reveal(self):
self._revealed = True
def user_input(self, input_letter):
assert len(input_letter) <= 1
self._user_letter = input_letter.lower()
def is_revealed(self) -> bool:
return self._revealed
def serialize(self):
result = super().serialize()
result['letter'] = self._letter
return result
class Grid(object):
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def __init__(self, width: int, height: int, lang_code: str, density=0.55):
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self._width = width
self._height = height
self._lang_code = lang_code
self._density = density
self._grid = []
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self._solution_locations = None
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try:
self._build_grid()
except Exception as e:
logging.error("error in generation", str(e))
traceback.print_exc()
def serialize(self):
return [
[cell.serialize() for cell in row] for row in self._grid
]
def get_status(self):
status = []
for y, row in enumerate(self._grid):
for x, cell in enumerate(row):
if cell.get_type() == FieldType.LETTER:
user_content = cell.get_user_content()
if cell.is_revealed():
status.append({
'x': x,
'y': y,
'revealed': cell.get_content()
})
elif len(user_content) > 0:
status.append({
'x': x,
'y': y,
'user_input': user_content
})
return status
def check_and_reveal_horizontal(self, x: int, y: int) -> list:
# TODO: this would be much more perfomant and elegant, if every cell would hold a reference
# to it's own word^^
status_update = []
cells_to_reveal = []
x_start = x
while (self._grid[y][x_start-1].get_type() == FieldType.LETTER):
x_start -= 1
x_i = x_start - 1
while(x_i + 1 < self._width and self._grid[y][x_i+1].get_type() == FieldType.LETTER):
x_i += 1
cell = self._grid[y][x_i]
if cell.get_user_content() != cell.get_content():
return []
cells_to_reveal.append(cell)
if x_start - x_i == 0:
# we have a single letter, not a word
return []
for i, cell in enumerate(cells_to_reveal):
status_update.append({
'x': x_start + i,
'y': y,
'revealed': cell.get_content()
})
cell.reveal()
return status_update
def check_and_reveal_vertical(self, x: int, y: int) -> list:
# TODO: this would be much more perfomant and elegant, if every cell would hold a reference
# to it's own word^^
status_update = []
cells_to_reveal = []
y_start = y
while (self._grid[y_start - 1][x].get_type() == FieldType.LETTER):
y_start -= 1
y_i = y_start - 1
while(y_i + 1 < self._width and self._grid[y_i+1][x].get_type() == FieldType.LETTER):
y_i += 1
cell = self._grid[y_i][x]
if cell.get_user_content() != cell.get_content():
return []
cells_to_reveal.append(cell)
if y_start - y_i == 0:
# we have a single letter, not a word
return []
for i, cell in enumerate(cells_to_reveal):
status_update.append({
'x': x,
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'y': y_start + i,
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'revealed': cell.get_content()
})
cell.reveal()
return status_update
def check_and_reveal_word(self, x: int, y: int):
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grid_update = self.check_and_reveal_horizontal(x, y) + self.check_and_reveal_vertical(x, y)
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# check also the solution locations
is_solution_cell = False
for location in self._solution_locations:
ly = location[0]
lx = location[1]
if lx == x and ly == y:
is_solution_cell = True
cell = self._grid[ly][lx]
if cell.get_user_content() != cell.get_content():
# not solved, nothing to do, return only grid update
return grid_update
if not is_solution_cell:
return grid_update
solution_updates = []
for location in self._solution_locations:
ly = location[0]
lx = location[1]
solution_updates.append({
'x': lx,
'y': ly,
'revealed': self._grid[ly][lx].get_content()
})
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self._grid[ly][lx].reveal()
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return grid_update + solution_updates
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def user_input(self, x: int, y: int, letter: str) -> list:
assert len(letter) <= 1
cell = self._grid[y][x]
if cell.get_type() != FieldType.LETTER:
# should not happen if the client does everything right
logging.warning("try to modify wrong cell")
return []
if cell.is_revealed():
# user tries to modify already revealed change, telling him it's already revealed ;)
return [{
'x': x,
'y': y,
'revealed': cell.get_content()
}]
letter = letter.lower()
cell.user_input(letter.lower())
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revealed_changes = self.check_and_reveal_word(x,y)
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if len(revealed_changes) == 0:
return [{
'x': x,
'y': y,
'user_input': cell.get_user_content()
}]
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return revealed_changes
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def get_solution_locations(self):
return self._solution_locations
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def _build_grid(self):
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raw_grid, word_infos, solution_locations = crossword_generator.create_word_grid(
self._width - 1, self._height - 1, lang_code=self._lang_code, target_density=self._density)
self._solution_locations = solution_locations
# fix solution locations offsets
for i in range(len(self._solution_locations)):
self._solution_locations[i][0] += 1
self._solution_locations[i][1] += 1
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# note: we will append an additional row and column, to have enough space to place hint fields
self._grid = [[Field()] * self._width] # initialize with empty row
for y in range(self._height - 1):
row = [Field()] # initialize row with empty column
for x in range(self._width - 1):
raw_cell = raw_grid[y, x]
if raw_cell == " ":
row.append(Field())
else:
row.append(LetterField(raw_cell))
self._grid.append(row)
# place hint fields:
for word, info in word_infos.items():
y, x = info.get_hint_location()
# correct offset
y += 1
x += 1
cell = self._grid[y][x]
# check if we already have a hint here:
if cell.get_type() == FieldType.HINT:
if info.is_vertical():
cell.set_vertical_hint(info.get_hint())
else:
cell.set_horizintal_hint(info.get_hint())
elif cell.get_type() == FieldType.LETTER:
# edge case: a word has "eaten up" another one, skipping that case
pass
else:
if info.is_vertical():
self._grid[y][x] = HintField(vertical_hint=info.get_hint())
else:
self._grid[y][x] = HintField(
horizontal_hint=info.get_hint())
class Crossword(object):
def __init__(self, width: int, height: int, lang_code: str = "en"):
self._width = width
self._height = height
self._grid = Grid(width, height, lang_code)
def serialize(self):
return {
'w': self._width,
'h': self._height,
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'grid': self._grid.serialize(),
'solution': self._grid.get_solution_locations()
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}
def user_input(self, x: int, y: int, letter: str) -> list:
return self._grid.user_input(x=x, y=y, letter=letter)
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def get_status(self) -> list:
return self._grid.get_status()
if __name__ == "__main__":
logging.basicConfig(level=logging.INFO)
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cw = Crossword(30, 30, "de")
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print(cw.serialize())