1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227

# Copyright (C) 2009 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

class DoclistController < ApplicationController
  layout 'standard'
  before_filter :setup_client, :set_user_email

  def all
    url = params[:url] ? params[:url] + "/-/#{MINE_LABEL}" :
                         DOCLIST_FEED + "/-/#{MINE_LABEL}/#{DOCUMENT_DOC_TYPE}"
    url += '?showfolders=true'

    begin
      feed = @client.get(url).to_xml
      @documents = create_docs(feed)
      @doc_type = DOCUMENT_DOC_TYPE
    rescue GData::Client::AuthorizationError
      logout
    end

    if !request.xhr?
      render :action => 'documents'
    else
      render :partial => 'documents_list'
    end
  end

  def documents
    @doc_type = DOCUMENT_DOC_TYPE
    get_documents_for(:category => [@doc_type, MINE_LABEL])
  end

  def spreadsheets
    @doc_type = SPREADSHEET_DOC_TYPE
    get_documents_for(:category => [@doc_type, MINE_LABEL])
  end

  def presentations
    @doc_type = PRESO_DOC_TYPE
    get_documents_for(:category => [@doc_type, MINE_LABEL])
  end

  def pdfs
    @doc_type = PDF_DOC_TYPE
    get_documents_for(:category => [@doc_type, MINE_LABEL])
  end

  def folders
    @doc_type = FOLDER_DOC_TYPE
    get_documents_for(:category => [@doc_type, MINE_LABEL],
                      :params=>'showfolders=true')
  end

  def starred
    @doc_type = DOCUMENT_DOC_TYPE
    get_documents_for(:category => [STARRED_LABEL, MINE_LABEL],
                      :params=>'showfolders=true')
  end

  def trashed
    @doc_type = DOCUMENT_DOC_TYPE
    get_documents_for(:category => [TRASHED_LABEL, MINE_LABEL],
                      :params=>'showfolders=true')
  end

  def show
    # expandAcl projection will inline the ACLs in the resulting feed
    url = params[:url].sub(/\/full/, '/expandAcl')

    entry = @client.get(url).to_xml
    @document = create_doc(entry)
    if @document.type == DOCUMENT_DOC_TYPE or @document.type == PRESO_DOC_TYPE
      export_url = @document.links['export'] + '&exportFormat=png'
      # Src value for an image containing a data URI
      @preview_img = Base64.encode64(download(export_url))
    end
    render :partial => 'show'
  end

  def download(export_url=nil)
    export_url ||= params[:export_url]

    resp = @client.get(export_url)

    # Set our response headers based on those returned with the file.
    headers['content-type'] = resp.headers['content-type']
    headers['content-disposition'] = resp.headers['content-disposition']

    if params[:export_url]
      render :text => resp.body
    else
      return resp.body
    end
  end

  def set_acls
    return unless request.xhr?

    @html, @errors = [], []
    @role = params[:role] || 'writer'

    if !params[:emails].nil?
      for email in params[:emails]
        entry = <<-EOF
          <entry xmlns='http://www.w3.org/2005/Atom'
                 xmlns:gAcl='http://schemas.google.com/acl/2007'>
            <category scheme='http://schemas.google.com/g/2005#kind'
                      term='http://schemas.google.com/acl/2007#accessRule'/>
            <gAcl:role value='#{@role}'/>
            <gAcl:scope type='user' value='#{email}'/>
          </entry>
        EOF
        begin
          resp = @client.post(params[:acl_feedlink], entry)
          @html.push("<li>#{email}</li>")
        rescue
          @errors.push(email)
        end
      end
    else
      render :update do |page|
        page.call "$('save_loading').toggleClassName", 'hidden'
        page.alert "You didn't select anyone to be a #{@role}"
      end
    end
  end

  def logout
    @client.auth_handler.revoke
    session[:users_email] = nil
    session[:token] = nil

    redirect_to '/'
  end

private

  def set_user_email
    # Query feed to fetch user's email
    if session[:users_email].nil?
      feed = @client.get(DOCLIST_FEED + '?max-results=0').to_xml
      session[:users_email] = feed.elements['author/email'].text
    end
  end

  def create_doc(entry)
    resource_id = entry.elements['gd:resourceId'].text.split(':')
    doc = GDoc::Document.new(entry.elements['title'].text,
                             :type => resource_id[0],
                             :xml => entry.to_s)

    doc.doc_id = resource_id[1]
    doc.last_updated = DateTime.parse(entry.elements['updated'].text)
    if !entry.elements['gd:lastViewed'].nil?
      doc.last_viewed = DateTime.parse(entry.elements['gd:lastViewed'].text)
    end
    if !entry.elements['gd:lastModifiedBy/email'].nil?
       doc.last_modified_by = entry.elements['gd:lastModifiedBy/email'].text
    end
    doc.writers_can_invite = entry.elements['docs:writersCanInvite'].attributes['value']
    doc.author = entry.elements['author/email'].text

    entry.elements.each('link') do |link|
      doc.links[link.attributes['rel']] = link.attributes['href']
    end
    doc.links['acl_feedlink'] = entry.elements['gd:feedLink'].attributes['href']
    doc.links['content_src'] = entry.elements['content'].attributes['src']

    case doc.type
      when DOCUMENT_DOC_TYPE, PRESO_DOC_TYPE
        doc.links['export'] = DOCLIST_SCOPE +
                              "download/documents/Export?docID=#{doc.doc_id}"
      when SPREADSHEET_DOC_TYPE
        doc.links['export'] = SPREADSHEETS_SCOPE +
                              "download/spreadsheets/Export?key=#{doc.doc_id}"
      when PDF_DOC_TYPE
        doc.links['export'] = doc.links['content_src']
    end

    entry.elements.each('gd:feedLink/feed/entry') do |feedlink_entry|
      email = feedlink_entry.elements['gAcl:scope'].attributes['value']
      role = feedlink_entry.elements['gAcl:role'].attributes['value']
      doc.add_permission(email, role)
    end
    return doc
  end

  def create_docs(feed)
    documents = []
    feed.elements.each('entry') do |entry|
      doc = create_doc(entry)
      documents.push(doc) if !doc.nil?
    end
    return documents
  end

  def get_documents_for(options={})
    options[:category] ||= [MINE_LABEL]

    begin
      uri = DOCLIST_FEED + "/-/#{options[:category].join('/')}"
      uri += "?#{options[:params]}" if options[:params]
      feed = @client.get(uri).to_xml
      @documents = create_docs(feed)
    rescue GData::Client::AuthorizationError
      logout
    end

    unless request.xhr?
      render :action => 'documents'
    else
      render :partial => 'documents_list'
    end
  end

end