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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
class MismatchedRowLengthsException(Exception):
"""
This exception is thrown when there is a mismatch between the number of items in a row,
and the number of headers defined.
"""
pass
class TableBuilder:
"""
Helper class for building tables.
"""
def __init__(self, title, widths, header_rows, headers, indent=0):
"""
:param title: str - Title of the table
:param widths: list of str - Widths of each column of the table
:param header_rows: int - Number of header rows
:param headers: 2D list of str - Headers
:param indent: int - Number of spaces to indent table
"""
if not isinstance(title, str):
raise TypeError("TableBuilder attribute title must be a string.")
if not isinstance(widths, list) or not isinstance(widths[0], int):
raise TypeError("TableBuilder attribute widths must be a list of integers.")
if not isinstance(header_rows, int):
raise TypeError("TableBuilder attribute header_rows must be an integer.")
if (
not isinstance(headers, list)
or not isinstance(headers[0], list)
or not isinstance(headers[0][0], str)
):
raise TypeError(
"TableBuilder attribute headers must be a two-dimensional list of strings."
)
if not isinstance(indent, int):
raise TypeError("TableBuilder attribute indent must be an integer.")
self.title = title
self.widths = widths
self.header_rows = header_rows
self.headers = headers
self.indent = " " * indent
self.table = ""
self._build_table()
def _build_table(self):
if len(self.widths) != len(self.headers[0]):
raise MismatchedRowLengthsException(
"Number of table headers must match number of column widths."
)
widths = " ".join(map(str, self.widths))
self.table += (
f"{self.indent}.. list-table:: **{self.title}**\n"
f"{self.indent} :widths: {widths}\n"
f"{self.indent} :header-rows: {self.header_rows}\n\n"
)
self.add_rows(self.headers)
def add_rows(self, rows):
if (
type(rows) is not list
or type(rows[0]) is not list
or type(rows[0][0]) is not str
):
raise TypeError("add_rows() requires a two-dimensional list of strings.")
for row in rows:
self.add_row(row)
def add_row(self, values):
if len(values) != len(self.widths):
raise MismatchedRowLengthsException(
"Number of items in a row must must number of columns defined."
)
for i, val in enumerate(values):
if i == 0:
self.table += f"{self.indent} * - **{val}**\n"
else:
self.table += f"{self.indent} - {val}\n"
def finish_table(self):
self.table += "\n"
return self.table
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