import os import random import re from collections import OrderedDict from collections.abc import Callable from dataclasses import dataclass from typing import Any from django.conf import settings from django.http import HttpRequest, HttpResponse, HttpResponseNotFound from django.template import loader from django.template.response import TemplateResponse from django.views.generic import TemplateView from lxml import html from lxml.etree import Element, SubElement, XPath, _Element from markupsafe import Markup from typing_extensions import override from zerver.context_processors import zulip_default_context from zerver.decorator import add_google_analytics_context from zerver.lib.html_to_text import get_content_description from zerver.lib.integrations import ( CATEGORIES, INTEGRATIONS, META_CATEGORY, HubotIntegration, WebhookIntegration, get_all_event_types_for_integration, ) from zerver.lib.subdomains import get_subdomain from zerver.lib.templates import render_markdown_path from zerver.lib.typed_endpoint import PathOnly, typed_endpoint from zerver.models import Realm from zerver.openapi.openapi import get_endpoint_from_operationid, get_openapi_summary @dataclass class DocumentationArticle: article_path: str article_http_status: int endpoint_path: str | None endpoint_method: str | None def add_api_url_context(context: dict[str, Any], request: HttpRequest) -> None: context.update(zulip_default_context(request)) subdomain = get_subdomain(request) if subdomain != Realm.SUBDOMAIN_FOR_ROOT_DOMAIN or not settings.ROOT_DOMAIN_LANDING_PAGE: display_subdomain = subdomain html_settings_links = True else: display_subdomain = "yourZulipDomain" html_settings_links = False display_host = Realm.host_for_subdomain(display_subdomain) api_url_scheme_relative = display_host + "/api" api_url = settings.EXTERNAL_URI_SCHEME + api_url_scheme_relative zulip_url = settings.EXTERNAL_URI_SCHEME + display_host context["external_url_scheme"] = settings.EXTERNAL_URI_SCHEME context["api_url"] = api_url context["api_url_scheme_relative"] = api_url_scheme_relative context["zulip_url"] = zulip_url context["html_settings_links"] = html_settings_links class ApiURLView(TemplateView): @override def get_context_data(self, **kwargs: Any) -> dict[str, str]: context = super().get_context_data(**kwargs) add_api_url_context(context, self.request) return context sidebar_headings = XPath("//*[self::h1 or self::h2 or self::h3 or self::h4]") sidebar_links = XPath("//a[@href=$url]") class MarkdownDirectoryView(ApiURLView): path_template = "" policies_view = False help_view = False api_doc_view = False def __init__(self, **kwargs: Any) -> None: super().__init__(**kwargs) self._post_render_callbacks: list[Callable[[HttpResponse], HttpResponse | None]] = [] def add_post_render_callback( self, callback: Callable[[HttpResponse], HttpResponse | None] ) -> None: self._post_render_callbacks.append(callback) def get_path(self, article: str) -> DocumentationArticle: http_status = 200 if article == "": article = "index" elif article == "include/sidebar_index": pass elif article == "api-doc-template": # This markdown template shouldn't be accessed directly. article = "missing" http_status = 404 elif "/" in article: article = "missing" http_status = 404 elif len(article) > 100 or not re.match(r"^[0-9a-zA-Z_-]+$", article): article = "missing" http_status = 404 path = self.path_template % (article,) endpoint_name = None endpoint_method = None if not self.path_template.startswith("/"): # Relative paths only used for policies documentation # when it is not configured or in the dev environment assert self.policies_view try: loader.get_template(path) return DocumentationArticle( article_path=path, article_http_status=http_status, endpoint_path=endpoint_name, endpoint_method=endpoint_method, ) except loader.TemplateDoesNotExist: return DocumentationArticle( article_path=self.path_template % ("missing",), article_http_status=404, endpoint_path=None, endpoint_method=None, ) if not os.path.exists(path): if self.api_doc_view: try: # API endpoints documented in zerver/openapi/zulip.yaml endpoint_name, endpoint_method = get_endpoint_from_operationid(article) path = self.path_template % ("api-doc-template",) except AssertionError: return DocumentationArticle( article_path=self.path_template % ("missing",), article_http_status=404, endpoint_path=None, endpoint_method=None, ) elif self.help_view or self.policies_view: article = "missing" http_status = 404 path = self.path_template % (article,) else: raise AssertionError("Invalid documentation view type") return DocumentationArticle( article_path=path, article_http_status=http_status, endpoint_path=endpoint_name, endpoint_method=endpoint_method, ) @override def get_context_data(self, **kwargs: Any) -> dict[str, Any]: article = kwargs["article"] context: dict[str, Any] = super().get_context_data() documentation_article = self.get_path(article) context["article"] = documentation_article.article_path not_index_page = not context["article"].endswith("/index.md") if documentation_article.article_path.startswith("/") and os.path.exists( documentation_article.article_path ): # Absolute path case article_absolute_path = documentation_article.article_path else: # Relative path case article_absolute_path = os.path.join( settings.DEPLOY_ROOT, "templates", documentation_article.article_path ) if self.help_view: context["page_is_help_center"] = True context["doc_root"] = "/help/" context["doc_root_title"] = "Help center" sidebar_article = self.get_path("include/sidebar_index") sidebar_index = sidebar_article.article_path title_base = "Zulip help center" elif self.policies_view: context["page_is_policy_center"] = True context["doc_root"] = "/policies/" context["doc_root_title"] = "Terms and policies" sidebar_article = self.get_path("sidebar_index") if sidebar_article.article_http_status == 200: sidebar_index = sidebar_article.article_path else: sidebar_index = None title_base = "Zulip terms and policies" elif self.api_doc_view: context["page_is_api_center"] = True context["doc_root"] = "/api/" context["doc_root_title"] = "API documentation" sidebar_article = self.get_path("sidebar_index") sidebar_index = sidebar_article.article_path title_base = "Zulip API documentation" else: raise AssertionError("Invalid documentation view type") # The following is a somewhat hacky approach to extract titles from articles. endpoint_name = None endpoint_method = None if os.path.exists(article_absolute_path): with open(article_absolute_path) as article_file: first_line = article_file.readlines()[0] if self.api_doc_view and context["article"].endswith("api-doc-template.md"): endpoint_name, endpoint_method = ( documentation_article.endpoint_path, documentation_article.endpoint_method, ) assert endpoint_name is not None assert endpoint_method is not None article_title = get_openapi_summary(endpoint_name, endpoint_method) elif self.api_doc_view and "{generate_api_header(" in first_line: api_operation = context["PAGE_METADATA_URL"].split("/api/")[1] endpoint_name, endpoint_method = get_endpoint_from_operationid(api_operation) article_title = get_openapi_summary(endpoint_name, endpoint_method) else: # Strip the header and then use the first line to get the article title article_title = first_line.lstrip("#").strip() endpoint_name = endpoint_method = None if not_index_page: context["PAGE_TITLE"] = f"{article_title} | {title_base}" else: context["PAGE_TITLE"] = title_base placeholder_open_graph_description = ( f"REPLACEMENT_PAGE_DESCRIPTION_{int(2**24 * random.random())}" ) context["PAGE_DESCRIPTION"] = placeholder_open_graph_description def update_description(response: HttpResponse) -> None: if placeholder_open_graph_description.encode() in response.content: first_paragraph_text = get_content_description( response.content, context["PAGE_METADATA_URL"] ) response.content = response.content.replace( placeholder_open_graph_description.encode(), first_paragraph_text.encode(), ) self.add_post_render_callback(update_description) # An "article" might require the api_url_context to be rendered api_url_context: dict[str, Any] = {} add_api_url_context(api_url_context, self.request) api_url_context["run_content_validators"] = True context["api_url_context"] = api_url_context if endpoint_name and endpoint_method: context["api_url_context"]["API_ENDPOINT_NAME"] = endpoint_name + ":" + endpoint_method if sidebar_index is not None: sidebar_html = render_markdown_path(sidebar_index) else: sidebar_html = "" tree = html.fragment_fromstring(sidebar_html, create_parent=True) if not context.get("page_is_policy_center", False): home_h1 = Element("h1") home_link = SubElement(home_h1, "a") home_link.attrib["class"] = "no-underline" home_link.attrib["href"] = context["doc_root"] home_link.text = context["doc_root_title"] + " home" tree.insert(0, home_h1) url = context["doc_root"] + article # Remove ID attributes from sidebar headings so they don't conflict with index page headings headings = sidebar_headings(tree) assert isinstance(headings, list) for h in headings: assert isinstance(h, _Element) h.attrib.pop("id", "") # Highlight current article link links = sidebar_links(tree, url=url) assert isinstance(links, list) for a in links: assert isinstance(a, _Element) old_class = a.attrib.get("class", "") assert isinstance(old_class, str) a.attrib["class"] = old_class + " highlighted" sidebar_html = "".join(html.tostring(child, encoding="unicode") for child in tree) context["sidebar_html"] = Markup(sidebar_html) add_google_analytics_context(context) return context @override def get( self, request: HttpRequest, *args: object, article: str = "", **kwargs: object ) -> HttpResponse: # Hack: It's hard to reinitialize urls.py from tests, and so # we want to defer the use of settings.POLICIES_DIRECTORY to # runtime. if self.policies_view: self.path_template = f"{settings.POLICIES_DIRECTORY}/%s.md" documentation_article = self.get_path(article) http_status = documentation_article.article_http_status result = super().get(request, article=article) assert isinstance(result, TemplateResponse) for callback in self._post_render_callbacks: result.add_post_render_callback(callback) if http_status != 200: result.status_code = http_status return result def add_integrations_context(context: dict[str, Any]) -> None: alphabetical_sorted_categories = OrderedDict(sorted(CATEGORIES.items())) alphabetical_sorted_integration = OrderedDict(sorted(INTEGRATIONS.items())) enabled_integrations_count = sum(v.is_enabled() for v in INTEGRATIONS.values()) # Subtract 1 so saying "Over X integrations" is correct. Then, # round down to the nearest multiple of 10. integrations_count_display = ((enabled_integrations_count - 1) // 10) * 10 context["categories_dict"] = alphabetical_sorted_categories context["integrations_dict"] = alphabetical_sorted_integration context["integrations_count_display"] = integrations_count_display def add_integrations_open_graph_context(context: dict[str, Any], request: HttpRequest) -> None: path_name = request.path.rstrip("/").split("/")[-1] description = ( "Zulip comes with over a hundred native integrations out of the box, " "and integrates with Zapier and IFTTT to provide hundreds more. " "Connect the apps you use every day to Zulip." ) if path_name in INTEGRATIONS: integration = INTEGRATIONS[path_name] context["PAGE_TITLE"] = f"{integration.display_name} | Zulip integrations" context["PAGE_DESCRIPTION"] = description elif path_name in CATEGORIES: category = CATEGORIES[path_name] if path_name in META_CATEGORY: context["PAGE_TITLE"] = f"{category} | Zulip integrations" else: context["PAGE_TITLE"] = f"{category} tools | Zulip integrations" context["PAGE_DESCRIPTION"] = description elif path_name == "integrations": context["PAGE_TITLE"] = "Zulip integrations" context["PAGE_DESCRIPTION"] = description class IntegrationView(ApiURLView): template_name = "zerver/integrations/index.html" @override def get_context_data(self, **kwargs: Any) -> dict[str, Any]: context: dict[str, Any] = super().get_context_data(**kwargs) add_integrations_context(context) add_integrations_open_graph_context(context, self.request) add_google_analytics_context(context) return context @typed_endpoint def integration_doc(request: HttpRequest, *, integration_name: PathOnly[str]) -> HttpResponse: # FIXME: This check is jQuery-specific. if request.headers.get("x-requested-with") != "XMLHttpRequest": return HttpResponseNotFound() try: integration = INTEGRATIONS[integration_name] except KeyError: return HttpResponseNotFound() context: dict[str, Any] = {} add_api_url_context(context, request) context["integration_name"] = integration.name context["integration_display_name"] = integration.display_name context["recommended_channel_name"] = integration.stream_name if isinstance(integration, WebhookIntegration): assert integration.url.startswith("api/") context["integration_url"] = integration.url.removeprefix("api") all_event_types = get_all_event_types_for_integration(integration) if all_event_types is not None: context["all_event_types"] = all_event_types if isinstance(integration, HubotIntegration): context["hubot_docs_url"] = integration.hubot_docs_url doc_html_str = render_markdown_path(integration.doc, context, integration_doc=True) return HttpResponse(doc_html_str)