| 1 | # Parser for test templates |
| 2 | # |
| 3 | # Copyright (c) 2021 Virtuozzo International GmbH. |
| 4 | # |
| 5 | # This program is free software; you can redistribute it and/or modify |
| 6 | # it under the terms of the GNU General Public License as published by |
| 7 | # the Free Software Foundation; either version 2 of the License, or |
| 8 | # (at your option) any later version. |
| 9 | # |
| 10 | # This program is distributed in the hope that it will be useful, |
| 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | # GNU General Public License for more details. |
| 14 | # |
| 15 | # You should have received a copy of the GNU General Public License |
| 16 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | # |
| 18 | |
| 19 | import itertools |
| 20 | from lark import Lark |
| 21 | |
| 22 | grammar = """ |
| 23 | start: ( text | column_switch | row_switch )+ |
| 24 | |
| 25 | column_switch: "{" text ["|" text]+ "}" |
| 26 | row_switch: "[" text ["|" text]+ "]" |
| 27 | text: /[^|{}\[\]]+/ |
| 28 | """ |
| 29 | |
| 30 | parser = Lark(grammar) |
| 31 | |
| 32 | class Templater: |
| 33 | def __init__(self, template): |
| 34 | self.tree = parser.parse(template) |
| 35 | |
| 36 | c_switches = [] |
| 37 | r_switches = [] |
| 38 | for x in self.tree.children: |
| 39 | if x.data == 'column_switch': |
| 40 | c_switches.append([el.children[0].value for el in x.children]) |
| 41 | elif x.data == 'row_switch': |
| 42 | r_switches.append([el.children[0].value for el in x.children]) |
| 43 | |
| 44 | self.columns = list(itertools.product(*c_switches)) |
| 45 | self.rows = list(itertools.product(*r_switches)) |
| 46 | |
| 47 | def gen(self, column, row): |
| 48 | i = 0 |
| 49 | j = 0 |
| 50 | result = [] |
| 51 | |
| 52 | for x in self.tree.children: |
| 53 | if x.data == 'text': |
| 54 | result.append(x.children[0].value) |
| 55 | elif x.data == 'column_switch': |
| 56 | result.append(column[i]) |
| 57 | i += 1 |
| 58 | elif x.data == 'row_switch': |
| 59 | result.append(row[j]) |
| 60 | j += 1 |
| 61 | |
| 62 | return ''.join(result) |