import hashlib 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. The response includes both the result, and a hash of the original query, subsequent calls of the same hash are unnecessary. """ try: script_engine = CustomBpmnScriptEngine() result = script_engine.eval(body['expression'], body['data']) return {"result": result, "expression": body['expression'], "data": body['data']} except Exception as e: return {"result": False, "expression": body['expression'], "data": body['data'], "error": str(e)} 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)