Class: CloudRailSi::ServiceCode::Sandbox

Inherits:
Object
  • Object
show all
Defined in:
lib/cloudrail_si/servicecode/Sandbox.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(service_code, persistent_storage, instance_dependency_storage) ⇒ Sandbox

Returns a new instance of Sandbox.



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 18

def initialize(service_code, persistent_storage, instance_dependency_storage)
    @local_variables_stack = []
    @parameters_stack = []
    @code_function_name_stack = []
    @code_line_stack = []
    @persistent_storage = []
    @service_code = service_code
    @persistent_storage = persistent_storage
    @instance_dependency_storage = instance_dependency_storage
    @LIST_MAX_ADD_JUMP_ALLOWED = 32
    @thrown_error = nil
end

Instance Attribute Details

#code_function_name_stack ⇒ Object (readonly)

Returns the value of attribute code_function_name_stack.



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 9

def code_function_name_stack
  @code_function_name_stack
end

#code_line_stack ⇒ Object (readonly)

Returns the value of attribute code_line_stack.



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 12

def code_line_stack
  @code_line_stack
end

#instance_dependency_storage ⇒ Object (readonly)

Returns the value of attribute instance_dependency_storage.



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 11

def instance_dependency_storage
  @instance_dependency_storage
end

#local_variables_stack ⇒ Object (readonly)

Returns the value of attribute local_variables_stack.



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 10

def local_variables_stack
  @local_variables_stack
end

#thrown_error ⇒ Object (readonly)

Returns the value of attribute thrown_error.



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 8

def thrown_error
  @thrown_error
end

Instance Method Details

#call_function(function_name, parameters) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 296

def call_function(function_name, parameters)
    create_new_stack_level(function_name, -1)
    parameter_stack = current_parameters()
    Helper.add_all(parameter_stack, parameters)
end

#compare_variables(a_obj, b_obj, command_id, type_check) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 301

def compare_variables(a_obj, b_obj, command_id, type_check)
    a_obj = Helper.resolve(self, a_obj, false)
    b_obj = Helper.resolve(self, b_obj, false)
    if (!type_check && (a_obj.nil? || b_obj.nil?))
        return 0 if (a_obj.nil? && b_obj.nil?)
        return -1
    end

    if ((a_obj.is_a? Numeric) && (b_obj.is_a? Numeric))
        # doesn't matter if one is int and other is float
    elsif (a_obj.class != b_obj.class)
        Helper.debug
        return -1 if !type_check
        raise Errors::InternalError.new("Command #{command_id} compares arguments of different types")
    end

    return Helper.compare(a_obj, b_obj)
end

#create_new_stack_level(function_name, code_line) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 36

def create_new_stack_level(function_name, code_line)
    @local_variables_stack.push([])
    @parameters_stack.push([])
    @code_function_name_stack.push(function_name)
    @code_line_stack.push(code_line)
end

#current_function_code ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 53

def current_function_code
    @service_code[current_function_name()]
end

#current_function_name ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 48

def current_function_name
    return nil if (@code_function_name_stack.length === 0)
    @code_function_name_stack[-1]
end

#current_parameters ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 43

def current_parameters
    return nil if (@parameters_stack.length === 0)
    @parameters_stack[-1]
end

#current_service_code_line ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 57

def current_service_code_line
    return -1 if (@code_line_stack.length === 0)
    return @code_line_stack[-1]
end

#decode_variable_address(var_address) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 148

def decode_variable_address(var_address)
    dec_adr = []
    adr = var_address.instance_variable_get(:@address_string)
    Helper.assert(adr[0] != '$')
    if (adr[0] < '0' || adr[0] > '9')
        dec_adr.push(adr[0])
        adr = adr[1..-1]
    end
    adr_parts = adr.split('.')
    (0..adr_parts.length - 1).each do |i|
        part = adr_parts[i]
        if (Helper.is_number_string(part))
            dec_adr.push(Integer(part))
        else
            dec_adr.push(part)
        end
    end
    return dec_adr
end

#delete_entry(container, var_address) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 266

def delete_entry(container, var_address)
    if (var_address.length > 1)
        next_container = get_entry(container, var_address, false)
        return delete_entry(next_container, var_address[1..-1])
    end
    var_address_part = var_address[0]
    if (Helper.is_array(container))
        if (Helper.is_number_string(var_address_part))
            var_address_part = Integer(var_address_part)
        end
        if (!Helper.is_number(var_address_part) || var_address_part >= container.length)
            raise Errors::InternalError.new('Invalid index while indexing into an array')
        end
        idx = var_address_part
        list = container
        if (idx < list.length)
            list.delete_at(idx)
        end
        while (list.length && list[-1].nil?)
            list.pop()
        end
    elsif (Helper.is_object(container))
        var_address_part = var_address_part.to_s
        container.delete(var_address_part)
    elsif Helper.is_sandbox(container)
        var_address_part = var_address_part.to_s
        container.set(var_address_part, nil)
    end
    return false
end

#delete_variable(var_address_parts, stacklevel = -1)) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 126

def delete_variable(var_address_parts, stacklevel=-1)
    variables = get_stack_for_address_part(var_address_parts[0], stacklevel)
    var_idx = var_address_parts[1]
    if (var_address_parts.length <= 2)
        variables[var_idx] = nil if (var_idx < variables.length)
        return true
    end
    delete_entry(variables[var_idx], var_address_parts[2..-1])
end

#get_entry(container, var_address, empty_is_null) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 217

def get_entry(container, var_address, empty_is_null)
    entry = ''
    var_address_part = var_address[0]
    if (Helper.is_array(container) || Helper.is_string(container))
        if (Helper.is_number_string(var_address_part))
            var_address_part = Integer(var_address_part)
        end
        if (!Helper.is_number(var_address_part))
            var_address_part = 0 #TODO: for paypal, transactions is missing if the count is zero; this "fixes" it but might break other things.
#                        raise Errors::InternalError.new('Invalid index while indexing into an array or string')
        end
        if (!(empty_is_null && var_address_part >= container.length))
            entry = container[var_address_part]
        end
    elsif (Helper.is_object(container))
        if (!Helper.is_string(var_address_part))
            var_address_part = var_address_part.to_s
        end
        if (container.nil? && (!empty_is_null))
            entry = {}
        else
            begin
                entry = container.instance_variable_get('@' + var_address_part) # will fail if var_address_part starts with a number; set to nil if doesn't exist
            rescue
            end
            if !entry
                begin
                    entry = container[var_address_part]
                rescue
                    begin
                        entry = container.send(Helper.to_snake_case(var_address_part))
                    rescue
                        entry = {}
                        Helper.debug
                    end
                end
            end
        end
    elsif Helper.is_sandbox(container)
        if (!Helper.is_string(var_address_part))
            var_address_part = var_address_part.to_s
        end
        entry = container.get(var_address_part)
    end
    if (var_address.length > 1)
        return get_entry(   entry, var_address[1..-1], empty_is_null)
    end
    return entry
end

#get_parameter(idx, stacklevel) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 352

def get_parameter(idx, stacklevel)
    return nil if (@parameters_stack.length === 0 || stacklevel >= @parameters_stack.length || idx >= @parameters_stack[stacklevel].length)
    @parameters_stack[stacklevel][idx]
end

#get_params_stack ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 356

def get_params_stack
    @parameters_stack
end

#get_stack_for_address_part(part, stacklevel) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 135

def get_stack_for_address_part(part, stacklevel)
    if (part == 'L')
        variables = @local_variables_stack[stacklevel]
    elsif (part == 'P')
        variables = @parameters_stack[stacklevel]
    elsif (part == 'S')
        variables = @persistent_storage
    else
        raise Errors::InternalError.new("Could not attribute variable part #{part}")
    end
    return variables
end

#get_variable(var_address, stacklevel = -1,, empty_is_null = false) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 111

def get_variable(var_address, stacklevel=-1, empty_is_null=false)
    if Helper.is_var_address(var_address)
        var_address_parts = decode_variable_address(var_address)
    else
        var_address_parts = var_address
    end
    variables = get_stack_for_address_part(var_address_parts[0], stacklevel)

    return nil if (empty_is_null && var_address_parts[1] >= variables.length)

    local_entry = variables[var_address_parts[1]]
    return local_entry if (var_address_parts.length <= 2)
    get_entry(local_entry, var_address_parts[2..-1], empty_is_null)
end

#increment_current_service_code_line(amount) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 62

def increment_current_service_code_line(amount)
    @code_line_stack[-1] += amount if @code_line_stack.length
end

#is_sandbox ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 14

def is_sandbox
    true
end

#load_state_from_string(saved_state) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 331

def load_state_from_string(saved_state)
    savelist = JSON.parse(saved_state)

    # TODO: Add support for objects such as CustomDate
    @code_function_name_stack = savelist[0]
    @code_line_stack = savelist[1]
    @local_variables_stack = savelist[2]
    merge_stacks = lambda { |json_stack, stack|
        (json_stack.length).times do |i|
            if (i >= stack.length)
                stack.push(json_stack[i])
            else
                stack[i] = json_stack[i]
            end
        end
    }
    json_parameters_stack = savelist[3]
    json_persistent_storage = savelist[4]
    merge_stacks(json_parameters_stack, @parameters_stack)
    merge_stacks(json_persistent_storage, @persistent_storage)
end

#return_from_function ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 65

def return_from_function
    return if (@code_function_name_stack.length <= 1)

    call_function_command_parameters = Interpreter.decode_command_parameters(@service_code[@code_function_name_stack[-2]][@code_line_stack[-2]])

    (0..call_function_command_parameters.length - 1).each do |i|
        parameter_var = call_function_command_parameters[i]
        if Helper.is_var_address(parameter_var)
            value = @parameters_stack[-1][i - 1]
            set_variable(parameter_var, value, -2)
        end
    end
    @code_function_name_stack.pop()
    @code_line_stack.pop()
    @local_variables_stack.pop()
    @parameters_stack.pop()
    increment_current_service_code_line(1)
end

#save_state_to_string ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 319

def save_state_to_string
    savelist = []
    savelist.push(@code_function_name_stack)
    savelist.push(@code_line_stack)
    savelist.push(@local_variables_stack)
    savelist.push(@parameters_stack)
    savelist.push(@persistent_storage)
    as_json = savelist.to_json
    # TODO: Add support for objects such as CustomDate

    return as_json
end

#set_entry(container, var_address, value) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 168

def set_entry(container, var_address, value)
    if (var_address.length > 1)
        next_container = get_entry(container, var_address[0..-2], false)

        return set_entry(next_container, var_address[1..-1], value)
    end
    var_address_part = var_address[0]

    if (Helper.is_array(container))
        if (Helper.is_number_string(var_address_part))
            var_address_part = Integer(var_address_part)
        end
        if (!Helper.is_number(var_address_part) || var_address_part >= container.length)
            raise Errors::InternalError.new('Invalid index while indexing into an array')
        end
        idx = var_address_part
        list = container
        if (list.length + @LIST_MAX_ADD_JUMP_ALLOWED <= idx)
            (idx - list.length + 1).times do |i|
                list.push(nil)
            end
        end
        list[idx] = value
    elsif (Helper.is_object(container))
        if (!Helper.is_string(var_address_part))
            var_address_part = var_address_part.to_s
        end

        #There are three ways to interpret an address; we try them all
        begin
            container.instance_variable_set('@' + var_address_part, value)
        rescue
        end
        begin
            container.send(Helper.to_snake_case(var_address_part) + "=", value)
        rescue
        end
        begin
            container[var_address_part] = value
        rescue
        end
elsif Helper.is_sandbox(container)
        if (!Helper.is_string(var_address_part))
            var_address_part = var_address_part.to_s
        end
        container.set(var_address_part, value)
    end
    return false
end

#set_thrown_error(thrown_error) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 31

def set_thrown_error(thrown_error)
    Helper.debug
    @thrown_error = thrown_error
end

#set_variable(var_address, value, stacklevel = -1)) ⇒ Object 



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# File 'lib/cloudrail_si/servicecode/Sandbox.rb', line 83

def set_variable(var_address, value, stacklevel=-1)
    if Helper.is_var_address(var_address)
        var_address_parts = decode_variable_address(var_address)
    else
        var_address_parts = var_address
    end

    variables = get_stack_for_address_part(var_address_parts[0], stacklevel)
    var_idx = var_address_parts[1]
    if (var_address_parts.length <= 2)
        if (variables.length == var_idx)
            variables.push(value)
        elsif (variables.length > var_idx)
            variables[var_idx] = value
        elsif (variables.length + @LIST_MAX_ADD_JUMP_ALLOWED > var_idx)
            (0..var_idx - variables.length + 1).each do |i|
                variables.push(nil)
            end
            variables[var_idx] = value
        else
            raise Errors::InternalError.new("Could not decode variable #{var_address_parts.join(':')}")
        end
        return true
    end

    return set_entry(variables[var_idx], var_address_parts[2..-1], value)
end