lib/letter_avatar.rb
require 'open3'
require 'letter_avatar/version'
require 'letter_avatar/configuration'
require 'letter_avatar/avatar'
require 'letter_avatar/avatar_helper'
require 'letter_avatar/colors'
module LetterAvatar
extend LetterAvatar::Configuration
class ExecutionError < StandardError; end
def self.setup(&_block)
yield(self)
end
def self.resize(from, to, width, height)
execute(
# NOTE: ORDER is important!
%W(
convert
#{from}
-background transparent
-gravity center
-thumbnail #{width}x#{height}^
-extent #{width}x#{height}
-unsharp 2x0.5+0.7+0
-quality 98
#{to}
).join(' ')
)
true
rescue => e
false
end
def self.generate(username, size)
Avatar.generate(username, size)
end
def self.execute(cmd)
cmd = cmd.join(' ') if cmd.is_a?(Array)
if Gem.win_platform?
cmd.tr!("'", '"')
end
_stdout_str, err = Open3.capture3(cmd)
if !err.nil? && !err.empty?
raise ExecutionError.new("letter_avatar execution error (when calling '#{cmd}'): '#{err.strip}'")
end
true
end
def self.path_to_url(path)
path.to_s.sub('public/', '/')
end
end