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# Parser for test templates
#
# Copyright (c) 2021 Virtuozzo International GmbH.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import itertools
from lark import Lark
grammar = """
start: ( text | column_switch | row_switch )+
column_switch: "{" text ["|" text]+ "}"
row_switch: "[" text ["|" text]+ "]"
text: /[^|{}\[\]]+/
"""
parser = Lark(grammar)
class Templater:
def __init__(self, template):
self.tree = parser.parse(template)
c_switches = []
r_switches = []
for x in self.tree.children:
if x.data == 'column_switch':
c_switches.append([el.children[0].value for el in x.children])
elif x.data == 'row_switch':
r_switches.append([el.children[0].value for el in x.children])
self.columns = list(itertools.product(*c_switches))
self.rows = list(itertools.product(*r_switches))
def gen(self, column, row):
i = 0
j = 0
result = []
for x in self.tree.children:
if x.data == 'text':
result.append(x.children[0].value)
elif x.data == 'column_switch':
result.append(column[i])
i += 1
elif x.data == 'row_switch':
result.append(row[j])
j += 1
return ''.join(result)
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