Module: Spider::Model

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# File 'lib/spiderfw/model/model.rb', line 25

def self.base_type(klass)
    k = klass
    while (k && !base_types.include?(k))
        k = simplify_type(k)
    end
    return k
end

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# File 'lib/spiderfw/model/model.rb', line 19

def self.base_types
    @base_types
end

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# File 'lib/spiderfw/model/active_record.rb', line 303

def self.create_ar_classes(ar, container)
    @ar_models ||= []
    return if ar.spider_model
    name = ar.name.split(':')[-1]
    if (container.const_defined?(name))
        current = container.const_get(name)
    end
    unless current
        mod = Class.new(Spider::Model::BaseModel)
        container.const_set(name, mod)
    else
        mod = current
    end
    unless mod.is_a?(ActiveRecordModel)
        mod.instance_eval do
            include ActiveRecordModel
        end
    end
    mod.ar_defined = true unless current
    mod.ar = ar
    ar.spider_model = mod
    ar.reflections.each do |name, reflection|
        begin 
            create_ar_classes(reflection.klass, container) unless reflection.klass.spider_model
            through = reflection.through_reflection.klass
            create_ar_classes(through, container) if through && !through.spider_model
        rescue NameError
        end
    end
    @ar_models << mod
end

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# File 'lib/spiderfw/model/model.rb', line 60

def self.get(model, val=nil, set_loaded=false)
    if (val && !val.is_a?(Hash))
        if (model.primary_keys.length == 1)
            val = {model.primary_keys[0].name => val}
        else
            raise ModelException, "Can't get without primary keys"
        end
    end
    if identity_mapper
        return identity_mapper.get(model, val, set_loaded)
    else
        return model.new(val)
    end
end

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# File 'lib/spiderfw/model/model.rb', line 84

def self.identity_mapper #:nodoc:
    Spider.current[:identity_mapper]
end

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# File 'lib/spiderfw/model/model.rb', line 88

def self.identity_mapper=(im) #:nodoc:
    Spider.current[:identity_mapper] = im
end

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# File 'lib/spiderfw/model/model.rb', line 162

def self.in_unit(&proc)
    uow = self.unit_of_work
    self.start_unit_of_work unless uow
    self.with_identity_mapper do
        yield Spider::Model.unit_of_work
        unless uow
            self.unit_of_work.commit
            self.stop_unit_of_work 
        end
    end
    
end

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# File 'lib/spiderfw/model/model.rb', line 219

def self.load_fixtures(file, truncate=false)
    if (file =~ /\.([^\.]+)$/)
        extension = $1
    else
        raise ArgumentError, "Can't determine type of fixtures file #{file}"
    end
    data = {}
    case extension
    when 'yml'
        require 'yaml'
        data = YAML.load_file(file)
    end
     # Ruby 1.9: steps are not needed with ordered hashes
    data = [data] unless data.is_a?(Array)
    loaded = []
    data.each do |step|
        step.each do |mod_name, mod_data|
            mod = const_get_full(mod_name)
            mod.mapper.truncate! if truncate
            mod_data.each do |row|
                h = {}
                row.each do |k, v|
                    if v.is_a?(String)
                        if v[0..1] == '@@'
                            v = v[1..-1]
                        elsif v[0].chr == '@'
                            v = eval(v[1..-1].to_s)
                        end
                    end
                    h[k] = v
                end
                obj = mod.new(h)
                obj.insert
                loaded << obj
            end
        end
    end
    loaded
end

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# File 'lib/spiderfw/model/model.rb', line 140

def self.no_context(&proc)
    uow = self.unit_of_work
    self.unit_of_work = nil
    im = self.identity_mapper            
    self.identity_mapper = nil
    yield
    self.identity_mapper = im
    self.unit_of_work = uow
    
end

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# File 'lib/spiderfw/model/model.rb', line 133

def self.no_identity_mapper(&proc)
    im = self.identity_mapper
    self.identity_mapper = nil
    yield
    self.identity_mapper = im
end

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# File 'lib/spiderfw/model/model.rb', line 122

def self.no_unit_of_work(&proc)
    uow = self.unit_of_work
    self.unit_of_work = nil
    yield
    self.unit_of_work = uow
end

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# File 'lib/spiderfw/model/model.rb', line 76

def self.put(obj, check=false)
    if (identity_mapper)
        return identity_mapper.put(obj, check)
    else
        return obj
    end
end

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# File 'lib/spiderfw/model/model.rb', line 34

def self.ruby_type(klass) #:nodoc:
    map_types = {
        Spider::DataTypes::Text => String,
        Spider::DataTypes::Bool => FalseClass,
        Spider::DataTypes::Binary => String,
        Spider::DataTypes::FilePath => String
    }
    return map_types[klass] if map_types[klass]
    return klass
end

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# File 'lib/spiderfw/model/model.rb', line 46

def self.simplify_type(klass) #:nodoc:
    map_types = {
        
    }
    return klass if base_types.include?(klass)
    return klass if klass <= Spider::Model::BaseModel
    return t if t = map_types[klass]
    return klass.maps_to if klass.subclass_of?(Spider::DataType) && klass.maps_to
    return klass.superclass if klass.superclass
    return nil
end

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# File 'lib/spiderfw/model/model.rb', line 293

def self.sort(models, options={})
    options = {
        :association_dependencies => true
    }.merge(options)
    sorter = Sorter.new(models, options)
    sorter.sort
end

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# File 'lib/spiderfw/model/model.rb', line 92

def self.start_unit_of_work
    uow = UnitOfWork.new
    uow.start
end

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# File 'lib/spiderfw/model/model.rb', line 97

def self.stop_unit_of_work
    Spider.current[:unit_of_work].stop
end

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# File 'lib/spiderfw/model/model.rb', line 178

def self.sync_schema(model_or_app, force=false, options={}) #:nodoc:
    models = []
    mod = const_get_full(model_or_app)
    if (mod.is_a?(Module) && mod.include?(Spider::App))
        mod.models.each { |m| models << m }
    elsif (mod.subclass_of?(Spider::Model::BaseModel))
        models << mod
    end
    storages = []
    tables = []
    models.each do |m|
        unless (options[:no_sync])
            Spider::Logger.debug("SYNCING #{m}")
            m.mapper.sync_schema(force, options) if m.mapper.respond_to?(:sync_schema)
        end
        if (options[:drop_tables] && m.mapper.respond_to?(:schema))
            storages << m.mapper.storage unless storages.include?(m.mapper.storage)
            tables += m.mapper.schema.get_schemas.keys
        end
    end
    if (options[:drop_tables])
        dt = options[:drop_tables]
        tables.flatten
        storage_tables = {}
        storages.each do |s|
            s.list_tables.each do |t|
                storage_tables[t] = s
            end
        end
        tables_to_drop = []
        storage_tables.each do |table_name, storage|
            if !tables.include?(table_name) && (dt == true || table_name.index(dt) == 0)
                tables_to_drop << table_name
            end
        end
        raise Spider::Model::Mappers::SchemaSyncUnsafeConversion.new(tables_to_drop) unless tables_to_drop.empty?
        tables_to_drop.each{ |t| storage.drop_table(t) }
    end
end

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# File 'lib/spiderfw/model/model.rb', line 101

def self.unit_of_work(&proc) #:nodoc:
    uow = Spider.current[:unit_of_work]
    if !uow
        if proc
            uow = UnitOfWork.new(&proc)
        end
    end
    return uow
end

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# File 'lib/spiderfw/model/model.rb', line 112

def self.unit_of_work=(uow)
    Spider.current[:unit_of_work] = uow
end

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# File 'lib/spiderfw/model/model.rb', line 129

def self.unit_of_work_running?
    self.unit_of_work && self.unit_of_work.running?
end

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# File 'lib/spiderfw/model/model.rb', line 152

def self.with_identity_mapper(&proc)
    if identity_mapper
        yield identity_mapper
    else
        IdentityMapper.new do |im|
            yield im
        end
    end
end

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# File 'lib/spiderfw/model/model.rb', line 116

def self.with_unit_of_work(&proc)
    with_identity_mapper do
        return unit_of_work(&proc)
    end
end