cr-connect-workflow/crc/api/tools.py

100 lines
3.6 KiB
Python

import io
import json
import connexion
from SpiffWorkflow.bpmn.PythonScriptEngine import PythonScriptEngine
from flask import send_file
from jinja2 import Template, UndefinedError
from crc.api.common import ApiError
from crc.scripts.complete_template import CompleteTemplate
from crc.scripts.script import Script
from crc.services.email_service import EmailService
from config.default import DEFAULT_SENDER
from crc.services.workflow_processor import CustomBpmnScriptEngine
def render_markdown(data, template):
"""
Provides a quick way to very that a Jinja markdown template will work properly on a given json
data structure. Useful for folks that are building these markdown templates.
"""
try:
template = Template(template)
data = json.loads(data)
return template.render(**data)
except UndefinedError as ue:
raise ApiError(code="undefined_field", message=ue.message)
except Exception as e:
raise ApiError(code="invalid_render", message=str(e))
def render_docx():
"""
Provides a quick way to verify that a Jinja docx template will work properly on a given json
data structure. Useful for folks that are building these templates.
"""
try:
file = connexion.request.files['file']
data = connexion.request.form['data']
target_stream = CompleteTemplate().make_template(file, json.loads(data))
return send_file(
io.BytesIO(target_stream.read()),
as_attachment=True,
attachment_filename="output.docx",
mimetype="application/octet-stream",
cache_timeout=-1 # Don't cache these files on the browser.
)
except ValueError as e:
raise ApiError(code="undefined_field", message=str(e))
except Exception as e:
raise ApiError(code="invalid_render", message=str(e))
def list_scripts():
"""Provides a list of scripts that can be called by a script task."""
scripts = Script.get_all_subclasses()
script_meta = []
for script_class in scripts:
script_meta.append(
{
"name": script_class.__name__,
"description": script_class().get_description()
})
return script_meta
def send_email(subject, address, body, data=None):
"""Just sends a quick test email to assure the system is working."""
if address and body:
body = body.decode('UTF-8')
return send_test_email(subject, address, body, json.loads(data))
else:
raise ApiError(code='missing_parameter',
message='You must provide an email address and a message.')
def evaluate_python_expression(body):
"""Evaluate the given python expression, returning its result. This is useful if the
front end application needs to do real-time processing on task data. If for instance
there is a hide expression that is based on a previous value in the same form."""
try:
script_engine = CustomBpmnScriptEngine()
result = script_engine.eval(body['expression'], body['data'])
return {"result": result}
except Exception as e:
raise ApiError("expression_error", f"Failed to evaluate the expression '%s'. %s" %
(body['expression'], str(e)),
task_data = body["data"])
def send_test_email(subject, address, message, data=None):
rendered, wrapped = EmailService().get_rendered_content(message, data)
EmailService.add_email(
subject=subject,
sender=DEFAULT_SENDER,
recipients=[address],
content=rendered,
content_html=wrapped)