Class: Datastorage

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

Class Method Summary collapse

Class Method Details

.delete(sadkey) ⇒ Object 



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# File 'lib/datastore.rb', line 75

def self::delete sadkey
    if $datafile == "" || !File.exist?($datafile)
        return false
    end
    # Verify that the key exists in the file.
    File.open($datafile, "r") do |f|
        f.each_line do |line|
            key, value = line.split(" | ")
            if key.to_s == sadkey.to_s
                $existence = true
            end
        end
        if $existence == false
            return false
        end
    end
    hashmap = Hash.new
    File.open($datafile, "r") do |f|
        f.each_line do |line|
            key, value = line.split(" | ")
            hashmap[key] = value
        end
    end
    
    File.open($datafile, "w+") do |f|
        hashmap.each do |key, value|
            if key != sadkey
                f.puts "#{key} | #{value}"
            end
        end
    end
end

.open(file) ⇒ Object 



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# File 'lib/datastore.rb', line 4

def self::open file
    $datafile = file
    return true
end

.parse ⇒ Object 



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# File 'lib/datastore.rb', line 9

def self::parse
    if $datafile == "" || !File.exist?($datafile)
        return false
    end
    hashmap = Hash.new
    File.open($datafile, "r") do |f|
        f.each_line do |line|
            key, value = line.split(" | ")
            hashmap[key] = value
        end
    end
    return hashmap
end

.update(coolkey, newvalue) ⇒ Object 



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# File 'lib/datastore.rb', line 40

def self::update coolkey, newvalue
    if $datafile == "" || !File.exist?($datafile)
        return false
    end
    File.open($datafile, "r") do |f|
        f.each_line do |line|
            key, value = line.split(" | ")
            if key.to_s == coolkey.to_s
                $existence = true
            end
        end
        if $existence == false
            return false
        end
    end

    hashmap = Hash.new
    File.open($datafile, "r") do |f|
        f.each_line do |line|
            key, value = line.split(" | ")
            hashmap[key] = value
        end
    end

    File.open($datafile, "w+") do |f|
        hashmap.each do |key, value|
            if key == coolkey
                f.puts "#{key} | #{newvalue}"
            else
                f.puts "#{key} | #{value}"
            end
        end
    end
end

.write(wkey, value) ⇒ Object 



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# File 'lib/datastore.rb', line 23

def self::write wkey, value
    if $datafile == "" || !File.exist?($datafile)
        return false
    end
    File.open($datafile, "r") do |f|
        f.each_line do |line|
            key, value = line.split(" | ")
            if key == wkey
                return false # Key already exists.
            end
        end
    end
    File.open($datafile, "r+") do |f|
        f.puts "#{wkey} | #{value}"
    end
end