Class: Taco

Inherits:
Object show all
Defined in:
lib/taco/taco.rb

Defined Under Namespace

Classes: Ambiguous, NotFound

Constant Summary collapse

HOME_DIR = 
'.taco'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root_path = nil) ⇒ Taco

Returns a new instance of Taco.



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

def initialize(root_path=nil)
  @home = File.join(root_path || Dir.getwd, HOME_DIR)
end

Instance Attribute Details

#home ⇒ Object

Returns the value of attribute home.



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# File 'lib/taco/taco.rb', line 10

def home
  @home
end

Instance Method Details

#init! ⇒ Object

Raises:

  • (IOError) 


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# File 'lib/taco/taco.rb', line 19

def init!
  raise IOError.new("Could not create #{@home}\nDirectory already exists.") if File.exists?(@home)

  FileUtils.mkdir_p(@home)

  "Initialized #{@home}"
end

#list(opts = {}) ⇒ Object 



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# File 'lib/taco/taco.rb', line 66

def list(opts={})
  filter_match = if opts.fetch(:filters, []).size > 0
    conditions = opts[:filters].map do |filter|
      attr, val = filter.split(':')
      attr = Issue.schema_attr_expand(attr)
      %Q|i.send("#{attr}").to_s.downcase == "#{val.downcase}"|
    end.join ' && '

    # FIXME: eval-ing user input? madness!
    eval "Proc.new { |i| #{conditions} }"
  else
    nil
  end

  ids = Dir.glob("#{@home}/*")

  ids.map do |name|
    id = File.basename name
    issue = Issue.from_json(open(name) { |f| f.read })

    next unless filter_match.nil? || filter_match.call(issue)

    raise Issue::Invalid.new("Issue ID does not match filename: #{issue.id} != #{id}") unless issue.id == id

    the_short_id = 8.upto(id.size).each do |n|
      the_short_id = id[0...n]
      break the_short_id unless ids.count { |i| i.include? the_short_id } > 1
    end

    # because the length of the short_id is determinable only within the context of a group of issues
    # (because it must long enough to be unique), we can only define it on Issue in the context of a group
    #
    issue.instance_eval "def short_id; #{the_short_id.inspect}; end"

    issue
  end.reject(&:nil?).sort
end

#read(issue_id) ⇒ Object

Raises:



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# File 'lib/taco/taco.rb', line 38

def read(issue_id)
  issue_path = File.join(@home, issue_id)

  unless File.exist? issue_path
    entries = Dir[File.join(@home, "*#{issue_id}*")]

    raise NotFound.new("Issue not found.") unless entries.size > 0
    unless entries.size == 1
      issue_list = entries.map do |entry|
        issue = read(File.basename(entry))
        "#{issue.id} : #{issue.summary}"
      end
      raise Ambiguous.new("Found several matching issues:\n%s" % issue_list.join("\n"))
    end

    issue_path = entries[0]
    issue_id = File.basename entries[0]
  end

  the_json = open(issue_path) { |f| f.read }

  issue = Issue.from_json the_json

  raise Issue::Invalid.new("Issue ID does not match filename: #{issue.id} != #{issue_id}") unless issue.id == issue_id

  issue
end

#write!(issue_or_issues) ⇒ Object 



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# File 'lib/taco/taco.rb', line 27

def write!(issue_or_issues)
  issues = issue_or_issues.is_a?(Array) ? issue_or_issues : [ issue_or_issues ]

  issues.each do |issue|
    the_json = issue.to_json # do this first so we don't bother the filesystem if the issue is invalid
    open(File.join(@home, issue.id), 'w') { |f| f.write(the_json) }
  end

  issue_or_issues
end