mechanize.cr/src/mechanize/form.cr
2021-06-29 21:41:04 +09:00

159 lines
4.9 KiB
Crystal

require "./form/field"
require "./form/radio_button"
require "./form/check_box"
require "./form/text"
require "./form/textarea"
require "./form/hidden"
require "./form/button"
require "./utils/element_matcher"
class MechanizeCr::Form
include MechanzeCr::ElementMatcher
getter node : Node | Myhtml::Node
getter fields : Array(FormContent::Field)
getter checkboxes : Array(FormContent::CheckBox)
getter radiobuttons : Array(FormContent::RadioButton)
getter buttons : Array(FormContent::Button)
getter enctype : String
getter method : String
getter name : String
property action : String
def initialize(node : Node | Myhtml::Node)
@enctype = node.fetch("enctype", "application/x-www-form-urlencoded")
@node = node
@fields = Array(FormContent::Field).new
@checkboxes = Array(FormContent::CheckBox).new
@radiobuttons = Array(FormContent::RadioButton).new
@buttons = Array(FormContent::Button).new
@action = node.fetch("action", "")
@method = node.fetch("method", "GET").upcase
@name = node.fetch("name", "")
@clicked_buttons = Array(FormContent::Button).new
#@page = page
#@mech = mech
#@encoding = node['accept-charset'] || (page && page.encoding) || nil
#@ignore_encoding_error = false
parse
end
def request_data
query_params = build_query
build_query_string(query_params)
end
# generate fields_with and field_with methods.
# These methods are used for finding nodes that matches conditions.
# ex.) field_with("email") finds <input name="email">
elements_with "field"
elements_with "radiobutton"
elements_with "checkbox", "checkboxes"
# Returns all fields of type Textarea
def textareas
fields.select { |f| f.class == FormContent::Textarea }.map &.as(FormContent::Textarea)
end
private def parse
@node.css("input").not_nil!.each do |html_node|
html_node = html_node.as(Myhtml::Node)
type = (html_node["type"] || "text").downcase
case type
when "checkbox"
checkboxes << FormContent::CheckBox.new(html_node, self)
when "radio"
radiobuttons << FormContent::RadioButton.new(html_node, self)
when "button"
buttons << FormContent::Button.new(html_node, @node)
when "submit"
buttons << FormContent::SubmitButton.new(html_node, @node)
when"reset"
buttons << FormContent::ResetButton.new(html_node, @node)
when "text"
fields << FormContent::Text.new(html_node)
when "hidden"
fields << FormContent::Hidden.new(html_node)
when "textarea"
fields << FormContent::Textarea.new(html_node)
else
fields << FormContent::Field.new(html_node)
end
end
# Find all textarea tags
@node.css("textarea").each do |node|
node = node.as(Myhtml::Node)
next if node["name"].empty?
@fields << FormContent::Textarea.new(node, node.inner_text)
end
end
private def build_query_string(params : Array(Array(String)))
params.reduce("") do |acc, arr|
hash = { arr[0] => arr[1] }
acc + URI::Params.encode(hash) + '&'
end.rchop
end
private def build_query
query = [] of Array(String)
successful_controls = Array(FormContent::Field | FormContent::CheckBox).new
fields.each do |elm|
successful_controls << elm
end
checkboxes.each do |elm|
if elm.checked
successful_controls << elm
end
end
radio_groups = Hash(String, Array(FormContent::RadioButton)).new
radiobuttons.each do |radio|
name = radio.name
radio_groups[name] = Array(FormContent::RadioButton).new unless radio_groups.has_key?(name)
radio_groups[name] << radio
end
radio_groups.each_value do |g|
checked = g.select(&.checked)
if checked.uniq.size > 1
#values = checked.map(&.value).join(', ').inspect
#name = checked.first.name.inspect
#raise Mechanize::Error,
# "radiobuttons #{values} are checked in the #{name} group, " \
# "only one is allowed"
raise MechanizeCr::Error.new
else
successful_controls << checked.first unless checked.empty?
end
end
@clicked_buttons.each do |b|
successful_controls << b
end
successful_controls.each do |ctrl|
value = ctrl.query_value
next if value[0] == ""
query.push(value)
end
query
end
# This method adds a button to the query. If the form needs to be
# submitted with multiple buttons, pass each button to this method.
def add_button_to_query(button)
unless button.form_node == @node
#message = ""
# "#{button.inspect} does not belong to the same page as " \
# "the form #{@name.inspect} in #{@page.uri}"
message = "not a valid button"
raise ArgumentError.new(message)
end
@clicked_buttons << button
end
end