Class: FirebaseStats::Reader

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

Overview

Parses the Firebase CSV file into sections

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Reader

Returns a new instance of Reader.



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# File 'lib/reader.rb', line 8

def initialize
  super
  @data = {}
end

Class Method Details

.mappings ⇒ Object 



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# File 'lib/reader.rb', line 50

def self.mappings
  {
    'Day,28-Day,7-Day,1-Day' => :active_users,
    'Day,Average engagement time' => :daily_engagement,
    'Page path and screen class,User engagement,Screen views' => :screens,
    'Day,Total revenue' => :revenue,
    'App,Crash-free users' => :crash_free_users,
    'App,Version,Status' => :version_adoption,
    'Source,first_open conversions,LTV' => :acquisition,
    'Date,Week 0,Week 1,Week 2,Week 3,Week 4,Week 5' => :retention_cohorts,
    'Country ID,Sessions,% Total' => :audience_country,
    'Device model,Users' => :devices,
    'OS with version,Users' => :os_version,
    'Gender,Users' => :gender,
    'Platform,Users' => :platform,
    'Platform,Users,% Total,User engagement,Total revenue' => :platform_engagement
  }
end

.search_string(section) ⇒ Object

Get the string that is used to find a given section in the CSV



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# File 'lib/reader.rb', line 44

def self.search_string(section)
  header = Reader.mappings.key(section)
  header = "Category,Male,Other,Female" if header.nil? and section == :gender_age
  return header
end

Instance Method Details

#get(section) ⇒ Object

Raises:



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

def get(section)
  found = @data[section]
  raise SectionNotFoundError.new(section) if found.nil?
  found
end

#num_sections ⇒ Object 



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# File 'lib/reader.rb', line 13

def num_sections
  @data.length
end

#parse(input) ⇒ Object

Parameters:

  • input (Array<String>) 


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# File 'lib/reader.rb', line 30

def parse(input)
  @data = {}
  curr_lines = []
  input.each_with_index do |line, idx|
    curr_lines.push(line) unless comment?(line) || line.strip.empty?

    if (idx == input.length - 1) || line.strip.empty?
      process_lines curr_lines unless curr_lines.empty?
      curr_lines = []
    end
  end
end

#parse_file(filename) ⇒ Object

Parameters:

  • filename (String) 


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# File 'lib/reader.rb', line 24

def parse_file(filename)
  lines = File.readlines(filename)
  parse(lines)
end