mirror of https://github.com/zulip/zulip.git
280 lines
10 KiB
Python
280 lines
10 KiB
Python
import re
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import json
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import inspect
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from markdown.extensions import Extension
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from markdown.preprocessors import Preprocessor
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from typing import Any, Dict, Optional, List, Tuple
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import markdown
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import zerver.openapi.python_examples
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from zerver.lib.openapi import get_openapi_fixture, openapi_spec
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MACRO_REGEXP = re.compile(r'\{generate_code_example(\(\s*(.+?)\s*\))*\|\s*(.+?)\s*\|\s*(.+?)\s*(\(\s*(.+)\s*\))?\}')
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CODE_EXAMPLE_REGEX = re.compile(r'\# \{code_example\|\s*(.+?)\s*\}')
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PYTHON_CLIENT_CONFIG = """
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#!/usr/bin/env python3
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import zulip
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# Pass the path to your zuliprc file here.
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client = zulip.Client(config_file="~/zuliprc")
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"""
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PYTHON_CLIENT_ADMIN_CONFIG = """
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#!/usr/bin/env python
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import zulip
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# The user for this zuliprc file must be an organization administrator
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client = zulip.Client(config_file="~/zuliprc-admin")
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"""
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DEFAULT_AUTH_EMAIL = "BOT_EMAIL_ADDRESS"
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DEFAULT_AUTH_API_KEY = "BOT_API_KEY"
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DEFAULT_EXAMPLE = {
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"integer": 1,
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"string": "demo",
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"boolean": False,
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}
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def parse_language_and_options(input_str: Optional[str]) -> Tuple[str, Dict[str, Any]]:
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if not input_str:
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return ("", {})
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language_and_options = re.match(r"(?P<language>\w+)(,\s*(?P<options>[\"\'\w\d\[\],= ]+))?", input_str)
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assert(language_and_options is not None)
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kwargs_pattern = re.compile(r"(?P<key>\w+)\s*=\s*(?P<value>[\'\"\w\d]+|\[[\'\",\w\d ]+\])")
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language = language_and_options.group("language")
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assert(language is not None)
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if language_and_options.group("options"):
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_options = kwargs_pattern.finditer(language_and_options.group("options"))
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options = {}
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for m in _options:
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options[m.group("key")] = json.loads(m.group("value").replace("'", '"'))
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return (language, options)
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return (language, {})
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def extract_python_code_example(source: List[str], snippet: List[str]) -> List[str]:
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start = -1
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end = -1
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for line in source:
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match = CODE_EXAMPLE_REGEX.search(line)
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if match:
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if match.group(1) == 'start':
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start = source.index(line)
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elif match.group(1) == 'end':
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end = source.index(line)
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break
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if (start == -1 and end == -1):
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return snippet
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snippet.extend(source[start + 1: end])
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snippet.append(' print(result)')
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snippet.append('\n')
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source = source[end + 1:]
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return extract_python_code_example(source, snippet)
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def render_python_code_example(function: str, admin_config: Optional[bool]=False,
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**kwargs: Any) -> List[str]:
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method = zerver.openapi.python_examples.TEST_FUNCTIONS[function]
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function_source_lines = inspect.getsourcelines(method)[0]
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if admin_config:
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config = PYTHON_CLIENT_ADMIN_CONFIG.splitlines()
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else:
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config = PYTHON_CLIENT_CONFIG.splitlines()
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snippet = extract_python_code_example(function_source_lines, [])
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code_example = []
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code_example.append('```python')
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code_example.extend(config)
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for line in snippet:
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# Remove one level of indentation and strip newlines
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code_example.append(line[4:].rstrip())
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code_example.append('```')
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return code_example
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def curl_method_arguments(endpoint: str, method: str,
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api_url: str) -> List[str]:
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# We also include the -sS verbosity arguments here.
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method = method.upper()
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url = "{}/v1{}".format(api_url, endpoint)
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valid_methods = ["GET", "POST", "DELETE", "PUT", "PATCH", "OPTIONS"]
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if method == "GET":
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# Then we need to make sure that each -d option translates to becoming
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# a GET parameter (in the URL) and not a POST parameter (in the body).
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# TODO: remove the -X part by updating the linting rule. It's redundant.
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return ["-sSX", "GET", "-G", url]
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elif method in valid_methods:
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return ["-sSX", method, url]
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else:
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msg = "The request method {} is not one of {}".format(method,
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valid_methods)
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raise ValueError(msg)
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def generate_curl_example(endpoint: str, method: str,
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api_url: str,
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auth_email: str=DEFAULT_AUTH_EMAIL,
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auth_api_key: str=DEFAULT_AUTH_API_KEY,
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exclude: List[str]=[]) -> List[str]:
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lines = ["```curl"]
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openapi_entry = openapi_spec.spec()['paths'][endpoint][method.lower()]
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openapi_params = openapi_entry.get("parameters", [])
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curl_first_line_parts = ["curl"] + curl_method_arguments(endpoint, method,
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api_url)
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lines.append(" ".join(curl_first_line_parts))
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authentication_required = openapi_entry.get("security", False)
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if authentication_required:
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lines.append(" -u %s:%s" % (auth_email, auth_api_key))
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for param in openapi_params:
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if param["in"] == "path":
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continue
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param_name = param["name"]
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if param_name in exclude:
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continue
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param_type = param["schema"]["type"]
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if param_type in ["object", "array"]:
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example_value = param.get("example", None)
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if not example_value:
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msg = """All array and object type request parameters must have
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concrete examples. The openAPI documentation for {}/{} is missing an example
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value for the {} parameter. Without this we cannot automatically generate a
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cURL example.""".format(endpoint, method, param_name)
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raise ValueError(msg)
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ordered_ex_val_str = json.dumps(example_value, sort_keys=True)
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line = " --data-urlencode {}='{}'".format(param_name, ordered_ex_val_str)
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else:
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example_value = param.get("example", DEFAULT_EXAMPLE[param_type])
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if type(example_value) == bool:
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example_value = str(example_value).lower()
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line = " -d '{}={}'".format(param_name, example_value)
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lines.append(line)
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for i in range(1, len(lines)-1):
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lines[i] = lines[i] + " \\"
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lines.append("```")
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return lines
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def render_curl_example(function: str, api_url: str,
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exclude: List[str]=[]) -> List[str]:
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""" A simple wrapper around generate_curl_example. """
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parts = function.split(":")
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endpoint = parts[0]
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method = parts[1]
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kwargs = dict() # type: Dict[str, Any]
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if len(parts) > 2:
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kwargs["auth_email"] = parts[2]
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if len(parts) > 3:
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kwargs["auth_api_key"] = parts[3]
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kwargs["api_url"] = api_url
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kwargs["exclude"] = exclude
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return generate_curl_example(endpoint, method, **kwargs)
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SUPPORTED_LANGUAGES = {
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'python': {
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'client_config': PYTHON_CLIENT_CONFIG,
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'admin_config': PYTHON_CLIENT_ADMIN_CONFIG,
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'render': render_python_code_example,
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},
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'curl': {
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'render': render_curl_example
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}
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} # type: Dict[str, Any]
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class APICodeExamplesGenerator(Extension):
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def __init__(self, api_url: Optional[str]) -> None:
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self.config = {
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'api_url': [
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api_url,
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'API URL to use when rendering curl examples'
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]
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}
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def extendMarkdown(self, md: markdown.Markdown, md_globals: Dict[str, Any]) -> None:
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md.preprocessors.add(
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'generate_code_example', APICodeExamplesPreprocessor(md, self.getConfigs()), '_begin'
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)
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class APICodeExamplesPreprocessor(Preprocessor):
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def __init__(self, md: markdown.Markdown, config: Dict[str, Any]) -> None:
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super(APICodeExamplesPreprocessor, self).__init__(md)
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self.api_url = config['api_url']
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def run(self, lines: List[str]) -> List[str]:
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done = False
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while not done:
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for line in lines:
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loc = lines.index(line)
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match = MACRO_REGEXP.search(line)
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if match:
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language, options = parse_language_and_options(match.group(2))
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function = match.group(3)
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key = match.group(4)
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argument = match.group(6)
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if self.api_url is None:
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raise AssertionError("Cannot render curl API examples without API URL set.")
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options['api_url'] = self.api_url
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if key == 'fixture':
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if argument:
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text = self.render_fixture(function, name=argument)
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else:
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text = self.render_fixture(function)
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elif key == 'example':
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if argument == 'admin_config=True':
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text = SUPPORTED_LANGUAGES[language]['render'](function, admin_config=True)
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else:
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text = SUPPORTED_LANGUAGES[language]['render'](function, **options)
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# The line that contains the directive to include the macro
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# may be preceded or followed by text or tags, in that case
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# we need to make sure that any preceding or following text
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# stays the same.
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line_split = MACRO_REGEXP.split(line, maxsplit=0)
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preceding = line_split[0]
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following = line_split[-1]
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text = [preceding] + text + [following]
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lines = lines[:loc] + text + lines[loc+1:]
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break
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else:
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done = True
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return lines
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def render_fixture(self, function: str, name: Optional[str]=None) -> List[str]:
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fixture = []
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# We assume that if the function we're rendering starts with a slash
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# it's a path in the endpoint and therefore it uses the new OpenAPI
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# format.
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if function.startswith('/'):
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path, method = function.rsplit(':', 1)
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fixture_dict = get_openapi_fixture(path, method, name)
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else:
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fixture_dict = zerver.openapi.python_examples.FIXTURES[function]
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fixture_json = json.dumps(fixture_dict, indent=4, sort_keys=True,
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separators=(',', ': '))
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fixture.append('```')
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fixture.extend(fixture_json.splitlines())
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fixture.append('```')
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return fixture
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def makeExtension(*args: Any, **kwargs: str) -> APICodeExamplesGenerator:
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return APICodeExamplesGenerator(*args, **kwargs)
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