141 lines
5.2 KiB
Python
141 lines
5.2 KiB
Python
import argparse, json
|
|
from pathlib import Path
|
|
|
|
from .template import DocxTemplate, TemplateError
|
|
|
|
TEMPLATE_ARG = 'template_path'
|
|
JSON_ARG = 'json_path'
|
|
OUTPUT_ARG = 'output_filename'
|
|
OVERWRITE_ARG = 'overwrite'
|
|
|
|
|
|
def make_arg_parser() -> argparse.ArgumentParser:
|
|
parser = argparse.ArgumentParser(
|
|
usage=f'docxtpl [-h] [-o] {TEMPLATE_ARG} {JSON_ARG} {OUTPUT_ARG}',
|
|
description='Make docx file from existing template docx and json data.')
|
|
parser.add_argument(TEMPLATE_ARG,
|
|
type=str,
|
|
help='The path to the template docx file.')
|
|
parser.add_argument(JSON_ARG,
|
|
type=str,
|
|
help='The path to the json file with the data.')
|
|
parser.add_argument(OUTPUT_ARG,
|
|
type=str,
|
|
help='The filename to save the generated docx.')
|
|
parser.add_argument('-' + OVERWRITE_ARG[0], '--' + OVERWRITE_ARG,
|
|
action='store_true',
|
|
help='If output file already exists, overwrites without asking for confirmation')
|
|
return parser
|
|
|
|
|
|
def get_args(parser: argparse.ArgumentParser) -> dict:
|
|
try:
|
|
parsed_args = vars(parser.parse_args())
|
|
return parsed_args
|
|
# Argument errors raise a SystemExit with code 2. Normal usage of the
|
|
# --help or -h flag raises a SystemExit with code 0.
|
|
except SystemExit as e:
|
|
if e.code == 0:
|
|
raise SystemExit from e
|
|
else:
|
|
raise RuntimeError(f'Correct usage is:\n{parser.usage}') from e
|
|
|
|
|
|
def is_argument_valid(arg_name: str, arg_value: str,overwrite: bool) -> bool:
|
|
# Basic checks for the arguments
|
|
if arg_name == TEMPLATE_ARG:
|
|
return Path(arg_value).is_file() and arg_value.endswith('.docx')
|
|
elif arg_name == JSON_ARG:
|
|
return Path(arg_value).is_file() and arg_value.endswith('.json')
|
|
elif arg_name == OUTPUT_ARG:
|
|
return arg_value.endswith('.docx') and check_exists_ask_overwrite(
|
|
arg_value, overwrite)
|
|
elif arg_name == OVERWRITE_ARG:
|
|
return arg_value in [True, False]
|
|
|
|
|
|
def check_exists_ask_overwrite(arg_value:str, overwrite: bool) -> bool:
|
|
# If output file does not exist or command was run with overwrite option,
|
|
# returns True, else asks for overwrite confirmation. If overwrite is
|
|
# confirmed returns True, else raises FileExistsError.
|
|
if Path(arg_value).exists() and not overwrite:
|
|
try:
|
|
if input(f'File {arg_value} already exists, would you like to overwrite the existing file? (y/n)').lower() == 'y':
|
|
return True
|
|
else:
|
|
raise FileExistsError
|
|
except FileExistsError as e:
|
|
raise RuntimeError(f'File {arg_value} already exists, please choose a different name.') from e
|
|
else:
|
|
return True
|
|
|
|
|
|
def validate_all_args(parsed_args:dict) -> None:
|
|
overwrite = parsed_args[OVERWRITE_ARG]
|
|
# Raises AssertionError if any of the arguments is not validated
|
|
try:
|
|
for arg_name, arg_value in parsed_args.items():
|
|
if not is_argument_valid(arg_name, arg_value,overwrite):
|
|
raise AssertionError
|
|
except AssertionError as e:
|
|
raise RuntimeError(
|
|
f'The specified {arg_name} "{arg_value}" is not valid.') from e
|
|
|
|
|
|
def get_json_data(json_path: Path) -> dict:
|
|
with open(json_path) as file:
|
|
try:
|
|
json_data = json.load(file)
|
|
return json_data
|
|
except json.JSONDecodeError as e:
|
|
print(
|
|
f'There was an error on line {e.lineno}, column {e.colno} while trying to parse file {json_path}')
|
|
raise RuntimeError('Failed to get json data.') from e
|
|
|
|
|
|
def make_docxtemplate(template_path: Path) -> DocxTemplate:
|
|
try:
|
|
return DocxTemplate(template_path)
|
|
except TemplateError as e:
|
|
raise RuntimeError('Could not create docx template.') from e
|
|
|
|
|
|
def render_docx(doc:DocxTemplate, json_data: dict) -> DocxTemplate:
|
|
try:
|
|
doc.render(json_data)
|
|
return doc
|
|
except TemplateError as e:
|
|
raise RuntimeError(f'An error ocurred while trying to render the docx') from e
|
|
|
|
|
|
def save_file(doc: DocxTemplate, output_path: Path) -> None:
|
|
try:
|
|
doc.save(output_path)
|
|
print(f'Document successfully generated and saved at {output_path}')
|
|
except PermissionError as e:
|
|
print(f'{e.strerror}. Could not save file {e.filename}.')
|
|
raise RuntimeError('Failed to save file.') from e
|
|
|
|
|
|
def main() -> None:
|
|
parser = make_arg_parser()
|
|
# Everything is in a try-except block that cacthes a RuntimeError that is
|
|
# raised if any of the individual functions called cause an error
|
|
# themselves, terminating the main function.
|
|
try:
|
|
parsed_args = get_args(parser)
|
|
validate_all_args(parsed_args)
|
|
json_data = get_json_data(Path(parsed_args[JSON_ARG]).resolve())
|
|
doc = make_docxtemplate(Path(parsed_args[TEMPLATE_ARG]).resolve())
|
|
doc = render_docx(doc,json_data)
|
|
save_file(doc, Path(parsed_args[OUTPUT_ARG]).resolve())
|
|
except RuntimeError as e:
|
|
print('Error: '+e.__str__())
|
|
return
|
|
finally:
|
|
print('Exiting program!')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|