Method: Pdfmdedit#update_tags

Defined in:
lib/pdfmd/pdfmdedit.rb

#update_tags ⇒ Object

Update the tags

Reads @@edit_tags and asks for updates from the user if no value in
@@edit_tags is provided



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
 
# File 'lib/pdfmd/pdfmdedit.rb', line 97

def update_tags()

  # Empty String for possible viewer Process PID
  viewerPID = ''

  # Iterate through all tags and request information from user
  #   if necessary
  @@edit_tags.each do |key,value|
    if value.empty?

      # At this poing:
      # 1. If @opendoc
      # 2. viewerPID.empty? (no viewer stated)
      # => Start the viewer
      if @opendoc and viewerPID.to_s.empty?
        viewerPID = start_viewer(@filename, @pdfviewer)
        self.log('debug', "Started external viewer '#{@pdfviewer}' with file '#{@filename}' and PID: #{viewerPID}")
      end

      puts 'Changing ' + key.capitalize + ', current value: ' + @@metadata[key].to_s

      # Save the current value
      current_value = @@metadata[key]

      # Validate Check for date input
      if key.downcase == 'createdate'

        # Repeat asking for a valid date
        validatedDate = false
        while !validatedDate
          userInput = readUserInput('New date value: ')

          if userInput.empty? and !current_value.empty?
            @@metadata[key] = current_value
            self.log('debug', "User decided to take over old value for #{key}.")
            puts 'Date is needed. Setting old value: ' + current_value
            break
          end

          # Update loop condition variable
          validatedDate = validateDate(userInput)

          # Update Metadata
          @@metadata[key] = validatedDate
        end

        # Input of all other values
      else

        @@metadata[key] = readUserInput('New value: ')

      end

    else

      # Setting the new metadata
      @@metadata[key] = value

    end
  end

  # Close the external PDF viewer if a PID has been set.
  if !viewerPID.to_s.empty?
    `kill #{viewerPID}`
    `pkill -f "#{@pdfviewer} #{@filename}"` # Double kill
    self.log('debug', "Viewer process with PID #{viewerPID} killed.")
  end

end