From 81d92cc73fb5e35c1e6a539dc1eb5f60b02dd316 Mon Sep 17 00:00:00 2001
From: Joe Gregorio <jcgregorio@google.com>
Date: Mon, 9 Jul 2012 16:46:02 -0400
Subject: Build cleaner and easier to read docs for dynamic surfaces.

Reviewed in http://codereview.appspot.com/6376043/.
---
 describe.py | 321 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 303 insertions(+), 18 deletions(-)

(limited to 'describe.py')

diff --git a/describe.py b/describe.py
index ff2ec1fea..8ee8e7a19 100644
--- a/describe.py
+++ b/describe.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright 2007 Google Inc.
+# Copyright 2012 Google Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -14,47 +14,332 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+"""Create documentation for generate API surfaces.
+
+Command-line tool that creates documentation for all APIs listed in discovery.
+The documentation is generated from a combination of the discovery document and
+the generated API surface itself.
+"""
+
 __author__ = 'jcgregorio@google.com (Joe Gregorio)'
 
+import json
 import os
-import pydoc
 import re
 import sys
 import httplib2
 
-from oauth2client.anyjson import simplejson
+from string import Template
+
 from apiclient.discovery import build
+from oauth2client.anyjson import simplejson
+import uritemplate
+
 
 BASE = 'docs/dyn'
 
-def document(resource, path):
-  print path
+CSS = """<style>
+
+body, h1, h2, h3, div, span, p, pre, a {
+  margin: 0;
+  padding: 0;
+  border: 0;
+  font-weight: inherit;
+  font-style: inherit;
+  font-size: 100%;
+  font-family: inherit;
+  vertical-align: baseline;
+}
+
+body {
+  font-size: 13px;
+  padding: 1em;
+}
+
+h1 {
+  font-size: 26px;
+  margin-bottom: 1em;
+}
+
+h2 {
+  font-size: 24px;
+  margin-bottom: 1em;
+}
+
+h3 {
+  font-size: 20px;
+  margin-bottom: 1em;
+  margin-top: 1em;
+}
+
+pre, code {
+  line-height: 1.5;
+  font-family: Monaco, 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Lucida Console', monospace;
+}
+
+pre {
+  margin-top: 0.5em;
+}
+
+h1, h2, h3, p {
+  font-family: Arial, sans serif;
+}
+
+h1, h2, h3 {
+  border-bottom: solid #CCC 1px;
+}
+
+.toc_element {
+  margin-top: 0.5em;
+}
+
+.firstline {
+  margin-left: 2 em;
+}
+
+.method  {
+  margin-top: 1em;
+  border: solid 1px #CCC;
+  padding: 1em;
+  background: #EEE;
+}
+
+.details {
+  font-weight: bold;
+  font-size: 14px;
+}
+
+</style>
+"""
+
+DISCOVERY_URI = ('https://www.googleapis.com/discovery/v1/apis/'
+                 '{api}/{apiVersion}/rest')
+
+METHOD_TEMPLATE = """<div class="method">
+    <code class="details" id="$name">$name($params)</code>
+  <pre>$doc</pre>
+</div>
+"""
+
+COLLECTION_LINK = """<p class="toc_element">
+  <code><a href="$href">$name()</a></code>
+</p>
+<p class="firstline">Returns the $name Resource.</p>
+"""
+
+METHOD_LINK = """<p class="toc_element">
+  <code><a href="#$name">$name($params)</a></code></p>
+<p class="firstline">$firstline</p>"""
+
+
+def safe_version(version):
+  """Create a safe version of the verion string.
+
+  Needed so that we can distinguish between versions
+  and sub-collections in URIs. I.e. we don't want
+  adsense_v1.1 to refer to the '1' collection in the v1
+  version of the adsense api.
+
+  Args:
+    version: string, The version string.
+  Returns:
+    The string with '.' replaced with '_'.
+  """
+
+  return version.replace('.', '_')
+
+
+def unsafe_version(version):
+  """Undoes what safe_version() does.
+
+  See safe_version() for the details.
+
+
+  Args:
+    version: string, The safe version string.
+  Returns:
+    The string with '_' replaced with '.'.
+  """
+
+  return version.replace('_', '.')
+
+
+def method_params(doc):
+  """Document the parameters of a method.
+
+  Args:
+    doc: string, The method's docstring.
+
+  Returns:
+    The method signature as a string.
+  """
+  doclines = doc.splitlines()
+  if 'Args:' in doclines:
+    begin = doclines.index('Args:')
+    if 'Returns:' in doclines[begin+1:]:
+      end = doclines.index('Returns:', begin)
+      args = doclines[begin+1: end]
+    else:
+      args = doclines[begin+1:]
+
+    parameters = []
+    for line in args:
+      m = re.search('^\s+([a-zA-Z0-9_]+): (.*)', line)
+      if m is None:
+        continue
+      pname = m.group(1)
+      desc = m.group(2)
+      if '(required)' not in desc:
+        pname = pname + '=None'
+      parameters.append(pname)
+    parameters = ', '.join(parameters)
+  else:
+    parameters = ''
+  return parameters
+
+
+def method(name, doc):
+  """Documents an individual method.
+
+  Args:
+    name: string, Name of the method.
+    doc: string, The methods docstring.
+  """
+
+  params = method_params(doc)
+  return Template(METHOD_TEMPLATE).substitute(name=name, params=params, doc=doc)
+
+
+def breadcrumbs(path, root_discovery):
+  """Create the breadcrumb trail to this page of documentation.
+
+  Args:
+    path: string, Dot separated name of the resource.
+    root_discovery: Deserialized discovery document.
+
+  Returns:
+    HTML with links to each of the parent resources of this resource.
+  """
+  parts = path.split('.')
+
+  crumbs = []
+  accumulated = []
+
+  for i, p in enumerate(parts):
+    prefix = '.'.join(accumulated)
+    # The first time through prefix will be [], so we avoid adding in a
+    # superfluous '.' to prefix.
+    if prefix:
+      prefix += '.'
+    display = p
+    if i == 0:
+      display = root_discovery.get('title', display)
+    crumbs.append('<a href="%s.html">%s</a>' % (prefix + p, display))
+    accumulated.append(p)
+
+  return ' . '.join(crumbs)
+
+
+def document_collection(resource, path, root_discovery, discovery, css=CSS):
+  """Document a single collection in an API.
+
+  Args:
+    resource: Collection or service being documented.
+    path: string, Dot separated name of the resource.
+    root_discovery: Deserialized discovery document.
+    discovery: Deserialized discovery document, but just the portion that
+      describes the resource.
+    css: string, The CSS to include in the generated file.
+  """
   collections = []
+  methods = []
+  resource_name = path.split('.')[-2]
+  html = [
+      '<html><body>',
+      css,
+      '<h1>%s</h1>' % breadcrumbs(path[:-1], root_discovery),
+      '<h2>Instance Methods</h2>'
+      ]
+
+  # Which methods are for collections.
   for name in dir(resource):
-    if not "_" in name and callable(getattr(resource, name)) and hasattr(
-          getattr(resource, name), '__is_resource__'):
-      collections.append(name)
+    if not name.startswith('_') and callable(getattr(resource, name)):
+      if hasattr(getattr(resource, name), '__is_resource__'):
+        collections.append(name)
+      else:
+        methods.append(name)
+
+
+  # TOC
+  if collections:
+    for name in collections:
+      if not name.startswith('_') and callable(getattr(resource, name)):
+        href = path + name + '.html'
+        html.append(Template(COLLECTION_LINK).substitute(href=href, name=name))
+
+  if methods:
+    for name in methods:
+      if not name.startswith('_') and callable(getattr(resource, name)):
+        doc = getattr(resource, name).__doc__
+        params = method_params(doc)
+        firstline = doc.splitlines()[0]
+        html.append(Template(METHOD_LINK).substitute(
+            name=name, params=params, firstline=firstline))
+
+  if methods:
+    html.append('<h3>Method Details</h3>')
+    for name in methods:
+      dname = name.rsplit('_')[0]
+      html.append(method(name, getattr(resource, name).__doc__))
+
+  html.append('</body></html>')
 
-  obj, name = pydoc.resolve(type(resource))
-  page = pydoc.html.page(
-      pydoc.describe(obj), pydoc.html.document(obj, name))
+  return '\n'.join(html)
 
-  for name in collections:
-    page = re.sub('strong>(%s)<' % name, r'strong><a href="%s">\1</a><' % (path + name + ".html"), page)
-  for name in collections:
-    document(getattr(resource, name)(), path + name + ".")
+
+def document_collection_recursive(resource, path, root_discovery, discovery):
+
+  html = document_collection(resource, path, root_discovery, discovery)
 
   f = open(os.path.join(BASE, path + 'html'), 'w')
-  f.write(page)
+  f.write(html)
   f.close()
 
+  for name in dir(resource):
+    if (not name.startswith('_')
+        and callable(getattr(resource, name))
+        and hasattr(getattr(resource, name), '__is_resource__')):
+      dname = name.rsplit('_')[0]
+      collection = getattr(resource, name)()
+      document_collection_recursive(collection, path + name + '.', root_discovery,
+               discovery['resources'].get(dname, {}))
+
 def document_api(name, version):
+  """Document the given API.
+
+  Args:
+    name: string, Name of the API.
+    version: string, Version of the API.
+  """
   service = build(name, version)
-  document(service, '%s.%s.' % (name, version))
+  response, content = http.request(
+      uritemplate.expand(
+          DISCOVERY_URI, {
+              'api': name,
+              'apiVersion': version})
+          )
+  discovery = json.loads(content)
+
+  version = safe_version(version)
+
+  document_collection_recursive(
+      service, '%s_%s.' % (name, version), discovery, discovery)
+
 
 if __name__ == '__main__':
   http = httplib2.Http()
-  resp, content = http.request('https://www.googleapis.com/discovery/v0.3/directory?preferred=true')
+  resp, content = http.request(
+      'https://www.googleapis.com/discovery/v1/apis?preferred=true')
   if resp.status == 200:
     directory = simplejson.loads(content)['items']
     for api in directory:
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