mirror of https://github.com/zulip/zulip.git
281 lines
11 KiB
Python
281 lines
11 KiB
Python
import json
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import re
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from typing import Any, Dict, List, Mapping, Sequence
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import markdown
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from django.utils.html import escape as escape_html
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from markdown.extensions import Extension
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from markdown.preprocessors import Preprocessor
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from zerver.lib.markdown.priorities import PREPROCESSOR_PRIORITES
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from zerver.openapi.openapi import (
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check_deprecated_consistency,
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get_openapi_parameters,
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get_parameters_description,
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)
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REGEXP = re.compile(r"\{generate_api_arguments_table\|\s*(.+?)\s*\|\s*(.+)\s*\}")
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API_PARAMETER_TEMPLATE = """
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<div class="api-argument" id="parameter-{argument}">
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<p class="api-argument-name"><strong>{argument}</strong> <span class="api-field-type">{type}</span> {required} {deprecated} <a href="#parameter-{argument}" class="api-argument-hover-link"><i class="fa fa-chain"></i></a></p>
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<div class="api-example">
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<span class="api-argument-example-label">Example</span>: <code>{example}</code>
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</div>
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<div class="api-description">{description}{object_details}</div>
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<hr>
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</div>
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""".strip()
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OBJECT_DETAILS_TEMPLATE = """
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<p><strong>{argument}</strong> object details:</p>
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<ul>
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{values}
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</ul>
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""".strip()
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OBJECT_LIST_ITEM_TEMPLATE = """
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<li>
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<code>{value}</code>: <span class=api-field-type>{data_type}</span> {required} {description}{object_details}
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</li>
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""".strip()
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OBJECT_DESCRIPTION_TEMPLATE = """
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{description}
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<p>{additional_information}</p>
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""".strip()
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OBJECT_CODE_TEMPLATE = "<code>{value}</code>".strip()
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class MarkdownArgumentsTableGenerator(Extension):
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def extendMarkdown(self, md: markdown.Markdown) -> None:
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md.preprocessors.register(
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APIArgumentsTablePreprocessor(md, self.getConfigs()),
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"generate_api_arguments",
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PREPROCESSOR_PRIORITES["generate_api_arguments"],
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)
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class APIArgumentsTablePreprocessor(Preprocessor):
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def __init__(self, md: markdown.Markdown, config: Mapping[str, Any]) -> None:
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super().__init__(md)
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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 = REGEXP.search(line)
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if not match:
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continue
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doc_name = match.group(2)
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endpoint, method = doc_name.rsplit(":", 1)
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arguments: List[Dict[str, Any]] = []
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try:
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arguments = get_openapi_parameters(endpoint, method)
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except KeyError as e:
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# Don't raise an exception if the "parameters"
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# field is missing; we assume that's because the
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# endpoint doesn't accept any parameters
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if e.args != ("parameters",):
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raise e
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if arguments:
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text = self.render_parameters(arguments)
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# We want to show this message only if the parameters
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# description doesn't say anything else.
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elif get_parameters_description(endpoint, method) == "":
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text = ["This endpoint does not accept any parameters."]
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else:
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text = []
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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 = 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_parameters(self, arguments: Sequence[Mapping[str, Any]]) -> List[str]:
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parameters = []
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md_engine = markdown.Markdown(extensions=[])
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arguments = sorted(arguments, key=lambda argument: "deprecated" in argument)
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for argument in arguments:
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name = argument.get("argument") or argument.get("name")
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description = argument["description"]
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enums = argument.get("schema", {}).get("enum")
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if enums is not None:
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formatted_enums = [
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OBJECT_CODE_TEMPLATE.format(value=json.dumps(enum)) for enum in enums
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]
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description += "\nMust be one of: {}. ".format(", ".join(formatted_enums))
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default = argument.get("schema", {}).get("default")
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if default is not None:
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description += f"\nDefaults to `{json.dumps(default)}`."
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data_type = ""
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if "schema" in argument:
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data_type = generate_data_type(argument["schema"])
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else:
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data_type = generate_data_type(argument["content"]["application/json"]["schema"])
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# TODO: OpenAPI allows indicating where the argument goes
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# (path, querystring, form data...). We should document this detail.
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example = ""
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if "example" in argument:
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# We use this style without explicit JSON encoding for
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# integers, strings, and booleans.
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# * For booleans, JSON encoding correctly corrects for Python's
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# str(True)="True" not matching the encoding of "true".
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# * For strings, doing so nicely results in strings being quoted
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# in the documentation, improving readability.
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# * For integers, it is a noop, since json.dumps(3) == str(3) == "3".
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example = json.dumps(argument["example"])
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else:
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example = json.dumps(argument["content"]["application/json"]["example"])
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required_string: str = "required"
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if argument.get("in", "") == "path":
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# Any path variable is required
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assert argument["required"]
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required_string = "required in path"
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if argument.get("required", False):
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required_block = f'<span class="api-argument-required">{required_string}</span>'
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else:
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required_block = '<span class="api-argument-optional">optional</span>'
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check_deprecated_consistency(argument, description)
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if argument.get("deprecated", False):
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deprecated_block = '<span class="api-argument-deprecated">Deprecated</span>'
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else:
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deprecated_block = ""
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object_block = ""
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# TODO: There are some endpoint parameters with object properties
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# that are not defined in `zerver/openapi/zulip.yaml`
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if "object" in data_type:
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if "schema" in argument:
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object_schema = argument["schema"]
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else:
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object_schema = argument["content"]["application/json"]["schema"]
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if "items" in object_schema and "properties" in object_schema["items"]:
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object_block = self.render_object_details(object_schema["items"], str(name))
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elif "properties" in object_schema:
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object_block = self.render_object_details(object_schema, str(name))
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parameters.append(
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API_PARAMETER_TEMPLATE.format(
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argument=name,
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example=escape_html(example),
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required=required_block,
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deprecated=deprecated_block,
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description=md_engine.convert(description),
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type=(data_type),
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object_details=object_block,
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)
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)
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return parameters
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def render_object_details(self, schema: Mapping[str, Any], name: str) -> str:
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md_engine = markdown.Markdown(extensions=[])
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li_elements = []
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object_values = schema.get("properties", {})
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for value in object_values:
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description = ""
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if "description" in object_values[value]:
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description = object_values[value]["description"]
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# check for default, enum, required or example in documentation
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additions: List[str] = []
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default = object_values.get(value, {}).get("default")
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if default is not None:
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formatted_default = OBJECT_CODE_TEMPLATE.format(value=json.dumps(default))
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additions += f"Defaults to {formatted_default}. "
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enums = object_values.get(value, {}).get("enum")
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if enums is not None:
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formatted_enums = [
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OBJECT_CODE_TEMPLATE.format(value=json.dumps(enum)) for enum in enums
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]
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additions += "Must be one of: {}. ".format(", ".join(formatted_enums))
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if "example" in object_values[value]:
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example = json.dumps(object_values[value]["example"])
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formatted_example = OBJECT_CODE_TEMPLATE.format(value=escape_html(example))
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additions += (
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f'<span class="api-argument-example-label">Example</span>: {formatted_example}'
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)
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if len(additions) > 0:
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additional_information = "".join(additions).strip()
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description_final = OBJECT_DESCRIPTION_TEMPLATE.format(
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description=md_engine.convert(description),
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additional_information=additional_information,
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)
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else:
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description_final = md_engine.convert(description)
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required_block = ""
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if "required" in schema:
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if value in schema["required"]:
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required_block = '<span class="api-argument-required">required</span>'
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else:
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required_block = '<span class="api-argument-optional">optional</span>'
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data_type = generate_data_type(object_values[value])
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details = ""
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if "object" in data_type and "properties" in object_values[value]:
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details += self.render_object_details(object_values[value], str(value))
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li = OBJECT_LIST_ITEM_TEMPLATE.format(
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value=value,
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data_type=data_type,
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required=required_block,
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description=description_final,
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object_details=details,
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)
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li_elements.append(li)
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object_details = OBJECT_DETAILS_TEMPLATE.format(
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argument=name,
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values="\n".join(li_elements),
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)
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return object_details
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def makeExtension(*args: Any, **kwargs: str) -> MarkdownArgumentsTableGenerator:
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return MarkdownArgumentsTableGenerator(*args, **kwargs)
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def generate_data_type(schema: Mapping[str, Any]) -> str:
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data_type = ""
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if "oneOf" in schema:
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for item in schema["oneOf"]:
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data_type = data_type + generate_data_type(item) + " | "
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data_type = data_type[:-3]
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elif "items" in schema:
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data_type = "(" + generate_data_type(schema["items"]) + ")[]"
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else:
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data_type = schema["type"]
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if "nullable" in schema and schema["nullable"]:
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data_type = data_type + " | null"
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return data_type
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