Class: CouchTomato::JsViewSource

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

Class Method Summary collapse

Class Method Details

.changed_views?(fs_doc, db_doc) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/couch_tomato/js_view_source.rb', line 39

def self.changed_views?(fs_doc, db_doc)
  return true if db_doc.nil?

  fs_doc['views'].each do |name, fs_view|
    db_view = db_doc['views'][name]
    %w(map reduce).each do |method|
      return true if db_view.nil? || db_view["sha1-#{method}"] != fs_view["sha1-#{method}"]
    end
  end

  return fs_doc['views'].length != db_doc['views'].length
end

.diff ⇒ Object 



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# File 'lib/couch_tomato/js_view_source.rb', line 52

def self.diff
  status_dict = {
    :NEW_DOC  => "new design:", :NEW_VIEW => "new view:", 
    :MOD_VIEW => "modified:",   :DEL_DOC  => "deleted:", 
    :DEL_VIEW => "deleted:",    :NEW_DB   => "new db:"
  }
  types = ["map", "reduce"]
  puts "# Changes with respect to the filesystem:"
  
  fs_database_names.each do |database_name|
    db = database(database_name)
    puts "#\t#{setw(status_dict[:NEW_DB], 14)}#{database_name}" unless is_db?(db)
    
    fs_docs = fs_design_docs(database_name)
    db_docs = is_db?(db) ? db_design_docs(db) : {}

    diff = []
    # design docs on fs but not in db
    (fs_docs.keys - db_docs.keys).each do |design_name|
      unless fs_docs[design_name]['views'].empty?
        diff.push [:NEW_DOC, "#{database_name}/_#{design_name}"]
        fs_docs[design_name]['views'].keys.each do |view| 
          (fs_docs[design_name]['views'][view].keys & types).each {|type|
            diff.push [:NEW_VIEW, "#{database_name}/_#{design_name}/#{view}-#{type}"]}
        end
      end
    end

    # design docs in db but not on fs
    (db_docs.keys - fs_docs.keys).each do |design_name|
      diff.push [:DEL_DOC, "#{database_name}/_#{design_name}"] unless (design_name.to_s.include? "migrations")
    end

    # design docs in both db and fs
    (fs_docs.keys & db_docs.keys).each do |design_name|
      common_view_keys = (fs_docs[design_name]['views'].keys & db_docs[design_name]['views'].keys)
      fs_only_view_keys = fs_docs[design_name]['views'].keys - common_view_keys
      db_only_view_keys = db_docs[design_name]['views'].keys - common_view_keys

      unless fs_only_view_keys.empty?
        methods = fs_only_view_keys.map do |key|
          %w(map reduce).map {|method| fs_docs[design_name]['views'][key][method].nil? ? nil : "#{key}-#{method}"}.compact
        end.flatten
        methods.each {|method| diff.push [:NEW_VIEW, "#{database_name}/_#{design_name}/#{method}"] }
      end

      unless db_only_view_keys.empty?
        methods = db_only_view_keys.map do |key|
          %w(map reduce).map {|method| db_docs[design_name]['views'][key][method] ? "#{key}-#{method}" : nil}.compact
        end
        methods.each {|method| diff.push [:DEL_VIEW, "#{database_name}/_#{design_name}/#{method}"] }
      end

      common_view_keys.each do |common_key|
        # are the sha's the same?
        # map reduce sha1
        fs_view = fs_docs[design_name]['views'][common_key]
        db_view = db_docs[design_name]['views'][common_key]

        # has either the map or reduce been added or removed
        %w(map reduce).each do |method|
          if db_view[method] && !fs_view[method]
            diff.push [:DEL_VIEW, "#{database_name}/_#{design_name}/#{common_key}-#{method}"]  and next
          end

          if fs_view[method] && !db_view[method]
            diff.push [:NEW_VIEW, "#{database_name}/_#{design_name}/#{common_key}-#{method}"]  and next
          end

          if fs_view["sha1-#{method}"] != db_view["sha1-#{method}"]
            diff.push [:MOD_VIEW, "#{database_name}/_#{design_name}/#{common_key}-#{method}"]  and next
          end
        end
      end
    end
    
    diff.uniq!
    diff.each do |status|
      puts "#\t#{setw(status_dict[status.first], 14)}#{status.last}"
    end
  end
end

.push(silent = false) ⇒ Object

todo: provide a ‘dirty?’ method that can be called in an initializer and warn the developer that view are out of sync todo: provide more granular information about which views are being modified todo: limitation (bug?) where if you remove a database’s views entirely from the file system, view’s will not be removed from the database as may be expected



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# File 'lib/couch_tomato/js_view_source.rb', line 10

def self.push(silent=false)
  fs_database_names.each do |database_name|
    db = database!(database_name)

    fs_docs = fs_design_docs(database_name)
    db_docs = db_design_docs(db)

    fs_docs.each do |design_name, fs_doc|
      db_doc = db_docs[design_name]

      if db_doc
        fs_doc['_id'] = db_doc['_id']
        fs_doc['_rev'] = db_doc['_rev']
      end

      if fs_doc['views'].empty?
        next unless fs_doc['_rev']
        puts "DELETE #{database_name}/#{fs_doc['_id']}" unless silent
        db.delete_doc(fs_doc)
      else
        if changed_views?(fs_doc, db_doc)
          puts "UPDATE #{database_name}/#{fs_doc['_id']}" unless silent
          db.save_doc(fs_doc)
        end
      end
    end
  end
end