Class: DxLite

Inherits:
Object
  • Object
show all
Defined in:
lib/dxlite.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(s = nil, autosave: false, debug: false) ⇒ DxLite

Returns a new instance of DxLite.



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# File 'lib/dxlite.rb', line 17

def initialize(s=nil, autosave: false, debug: false)

  @autosave, @debug = autosave, debug

  return unless s
  buffer, type = RXFHelper.read(s)
  
  @filepath = s if type == :file or type == :dfs
    
  puts 'type: ' + type.inspect if @debug
  puts 'buffer: ' + buffer.inspect if @debug

  @records = []
        
  case type
    
  when :file
    
    read buffer
    
  when :text
    
    @summary = {schema: s}

    
  when :url
    
    read buffer      
    
  end
  
  puts '@summary: ' + @summary.inspect
  @schema = @summary[:schema]
  
  summary_attributes = {
    recordx_type: 'dynarex',
    default_key: @schema[/(?<=\()\w+/]
  }

  puts 'before merge' if @debug
  @summary.merge!(summary_attributes)

  summary = @summary[:schema][/(?<=\[)[^\]]+/]
  
  if summary then

    summary.split(/ *, */).each do |x|
      @summary[x] = nil unless @summary[x]
    end
    
  end    
  
  make_methods()    

end

Instance Attribute Details

#records ⇒ Object (readonly)

Returns the value of attribute records.



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# File 'lib/dxlite.rb', line 15

def records
  @records
end

#summary ⇒ Object

Returns the value of attribute summary.



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# File 'lib/dxlite.rb', line 14

def summary
  @summary
end

Instance Method Details

#all ⇒ Object 



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# File 'lib/dxlite.rb', line 73

def all()

  @records.map do |h|
    
    puts 'h: ' + h.inspect if @debug
    RecordX.new(h[:body], self, h[:id], h[:created], 
                h[:last_modified])
  end

end

#create(rawh, id: nil, custom_attributes: {created: Time.now}) ⇒ Object 



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# File 'lib/dxlite.rb', line 94

def create(rawh, id: nil, custom_attributes: {created: Time.now})
  
  id ||= @records.map {|x| x[:id].to_i}.max.to_i + 1
  h2 = custom_attributes
  h = fields.map {|x| [x.to_sym, nil] }.to_h.merge(rawh)
  @records << {id: id.to_s, created: h2[:created], last_modified: nil, 
               body: h}
  
  save() if @autosave
end

#delete(id) ⇒ Object 



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# File 'lib/dxlite.rb', line 84

def delete(id)
  found = @records.find {|x| x[:id] == id}
  
  if found then
    @records.delete found 
    save() if @autosave
  end
  
end

#fields ⇒ Object 



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# File 'lib/dxlite.rb', line 105

def fields()
  @fields
end

#inspect ⇒ Object 



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# File 'lib/dxlite.rb', line 109

def inspect()
  "#<DxLite:%s @debug=%s, @summary=%s, ...>" % [object_id, @debug, 
                                                @summary.inspect]
end

#parse(obj = nil) ⇒ Object Also known as: import

Parses 1 or more lines of text to create or update existing records.



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# File 'lib/dxlite.rb', line 116

def parse(obj=nil)
  
  if obj.is_a? Array then
    
    unless schema() then
      cols = obj.first.keys.map {|c| c == 'id' ? 'uid' : c} 
      self.schema = "items/item(%s)" % cols.join(', ')
    end
      
    obj.each do |x|
      #puts 'x: ' + x.inspect if @debug
      self.create x, id: nil
    end
    
    return self 
    
  end  
end

#parse_xml(buffer) ⇒ Object 



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# File 'lib/dxlite.rb', line 137

def parse_xml(buffer)
  
  doc = Rexle.new(buffer)
  
  asummary = doc.root.xpath('summary/*').map do |node|
    puts 'node: '  + node.xml.inspect if @debug
    [node.name, node.text.to_s]
  end
  
  summary = Hash[asummary]
  summary[:schema] = summary['schema']
  %w(recordx_type format_mask schema).each {|x| summary.delete x}
  
  schema = summary[:schema]
  puts 'schema: ' + schema.inspect if @debug
  
  @fields = schema[/\(([^\)]+)/,1].split(/ *, +/)
  puts 'fields: ' + @fields.inspect if @debug
  
  a = doc.root.xpath('records/*').each do |node|
    
    h = Hash[@fields.map {|field| [field.to_sym, node.text(field).to_s] }]
    self.create h, id: nil
    
  end

  @summary = summary
  
end

#save(file = @filepath) ⇒ Object 



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# File 'lib/dxlite.rb', line 167

def save(file=@filepath)
  
  return unless file
  
  s = File.extname(file) == '.json' ? to_json() : to_xml()
  File.write file, s
end

#to_a ⇒ Object 



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# File 'lib/dxlite.rb', line 175

def to_a()
  @records.map {|x| x[:body]}
end

#to_h ⇒ Object 



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# File 'lib/dxlite.rb', line 179

def to_h()
  
  root_name = schema()[/^\w+/]
  record_name = schema()[/(?<=\/)[^\(]+/]
  
  h = {
    root_name.to_sym =>
    {
      summary: @summary,
      records: @records.map {|h| {record_name.to_sym => h} }
    }
  }
  
end

#to_json(pretty: true) ⇒ Object 



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# File 'lib/dxlite.rb', line 194

def to_json(pretty: true)
  pretty ? JSON.pretty_generate(to_h()) : to_h()
end

#to_xml ⇒ Object 



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# File 'lib/dxlite.rb', line 198

def to_xml()
  
  root_name = schema()[/^\w+/]
  record_name = schema()[/(?<=\/)[^\(]+/]
  
  a = RexleBuilder.build  do |xml|
    
    xml.send(root_name.to_sym) do
      xml.summary({}, @summary)
      xml.records do
        
        all().each do |x|
          
          h = {id: x.id, created: x.created, last_modified: x.last_modified}          
          puts 'x.to_h: ' + x.to_h.inspect if @debug
          xml.send(record_name.to_sym, h, x.to_h)
          
        end
        
      end
    end
  end

  Rexle.new(a).xml pretty: true    
      
  
end

#update(id, obj) ⇒ Object

Updates a record from an id and a hash containing field name and field value.

dynarex.update 4, name: Jeff, age: 38



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# File 'lib/dxlite.rb', line 229

def update(id, obj)
  
  if @debug then
    puts 'inside update'.info
    puts ('id: ' + id.inspect).debug
    puts ('obj.class: '  + obj.class.inspect).debug
  end
  
  r = @records.find {|x| x[:id] == id}
  
  if r then
    
    r[:body].merge!(obj)
    save() if @autosave
    
  end
  
end