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/src/main/java/com/meterware/httpunit/WebForm.java

/*
 * SPDX-License-Identifier: MIT
 * See LICENSE file for details.
 *
 * Copyright 2000-2026 Russell Gold
 * Copyright 2021-2000 hazendaz
 */
package com.meterware.httpunit;

import com.meterware.httpunit.protocol.ParameterProcessor;
import com.meterware.httpunit.protocol.UploadFileSpec;
import com.meterware.httpunit.scripting.FormScriptable;
import com.meterware.httpunit.scripting.IdentifiedDelegate;
import com.meterware.httpunit.scripting.NamedDelegate;
import com.meterware.httpunit.scripting.ScriptableDelegate;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.UnknownServiceException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.w3c.dom.Node;
import org.w3c.dom.html.HTMLCollection;
import org.w3c.dom.html.HTMLFormElement;
import org.xml.sax.SAXException;

/**
 * This class represents a form in an HTML page. Users of this class may examine the parameters defined for the form,
 * the structure of the form (as a DOM), or the text of the form. They may also create a {@link WebRequest} to simulate
 * the submission of the form.
 **/
public class WebForm extends WebRequestSource {

    /** The Constant NO_VALUES. */
    private static final String[] NO_VALUES = {};

    /** The buttons. */
    private Button[] _buttons;

    /** The submit buttons in this form. **/
    private SubmitButton[] _submitButtons;

    /** The character set in which the form will be submitted. **/
    private String _characterSet;

    /** The button list. */
    private List<SubmitButton> _buttonVector;

    /** The preset parameters. */
    private FormControl[] _presetParameters;

    /** The presets. */
    private ArrayList _presets;

    /** The registry. */
    private ElementRegistry _registry;

    /** Predicate to match a link's name. **/
    public static final HTMLElementPredicate MATCH_NAME;

    /** The dom element. */
    private HTMLFormElement _domElement;

    /**
     * Submits this form using the web client from which it was originally obtained.
     *
     * @return the web response
     *
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * @throws SAXException
     *             the SAX exception
     */
    public WebResponse submit() throws IOException, SAXException {
        return submit(getDefaultButton());
    }

    /**
     * Submits this form using the web client from which it was originally obtained. Will usually return the result of
     * that submission; however, if the submit button's 'onclick' or the form's 'onsubmit' event is triggered and
     * inhibits the submission, will return the updated contents of the frame containing this form.
     *
     * @param button
     *            the button
     *
     * @return the web response
     *
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * @throws SAXException
     *             the SAX exception
     */
    public WebResponse submit(SubmitButton button) throws IOException, SAXException {
        return submit(button, 0, 0);
    }

    /**
     * Submits this form using the web client from which it was originally obtained. Will usually return the result of
     * that submission; however, if the submit button's 'onclick' or the form's 'onsubmit' event is triggered and
     * inhibits the submission, will return the updated contents of the frame containing this form.
     *
     * @param button
     *            the button
     * @param x
     *            the x
     * @param y
     *            the y
     *
     * @return the web response
     *
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * @throws SAXException
     *             the SAX exception
     */
    public WebResponse submit(SubmitButton button, int x, int y) throws IOException, SAXException {
        if (button == null) {
            throw new IllegalSubmitButtonException("?", "?");
        }
        button.doOnClickSequence(x, y);
        return getCurrentFrameContents();
    }

    /**
     * Submits this form using the web client from which it was originally obtained, ignoring any buttons defined for
     * the form.
     *
     * @return the web response
     *
     * @throws SAXException
     *             the SAX exception
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    public WebResponse submitNoButton() throws SAXException, IOException {
        return submit(SubmitButton.createFakeSubmitButton(this /* fake */));
    }

    @Override
    protected WebResponse submitRequest(String event, WebRequest request) throws IOException, SAXException {
        try {
            return super.submitRequest(event, request);
        } catch (UnknownServiceException e) {
            throw new UnsupportedActionException(
                    "HttpUnit does not support " + request.getURL().getProtocol() + " URLs in form submissions");
        }
    }

    /**
     * Submits the form without also invoking the button's "onclick" event.
     *
     * @param button
     *            the button
     *
     * @return the web response
     *
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * @throws SAXException
     *             the SAX exception
     */
    WebResponse doFormSubmit(SubmitButton button) throws IOException, SAXException {
        return submitRequest(getAttribute("onsubmit"), getRequest(button));
    }

    /**
     * Do form submit.
     *
     * @param button
     *            the button
     * @param x
     *            the x
     * @param y
     *            the y
     *
     * @return the web response
     *
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     * @throws SAXException
     *             the SAX exception
     */
    WebResponse doFormSubmit(SubmitButton button, int x, int y) throws IOException, SAXException {
        return submitRequest(getAttribute("onsubmit"), getRequest(button, x, y));
    }

    /**
     * Returns the method defined for this form.
     *
     * @return the method
     */
    public String getMethod() {
        return getAttribute("method", "GET");
    }

    /**
     * Returns the action defined for this form.
     *
     * @return the action
     */
    public String getAction() {
        return getDestination();
    }

    /**
     * Returns true if a parameter with given name exists in this form.
     *
     * @param soughtName
     *            the sought name
     *
     * @return true, if successful
     */
    public boolean hasParameterNamed(String soughtName) {
        return getFormParameters().containsKey(soughtName);
    }

    /**
     * Returns true if a parameter starting with a given name exists,.
     *
     * @param prefix
     *            the prefix
     *
     * @return true, if successful
     */
    public boolean hasParameterStartingWithPrefix(String prefix) {
        String[] names = getParameterNames();
        for (String name : names) {
            if (name.startsWith(prefix)) {
                return true;
            }
        }
        return false;
    }

    /**
     * Returns an array containing all of the buttons defined for this form.
     *
     * @return the buttons
     */
    public Button[] getButtons() {
        if (_buttons == null) {
            FormControl[] controls = getFormControls();
            List<FormControl> buttonList = new ArrayList<>();
            for (FormControl control : controls) {
                if (control instanceof Button) {
                    buttonList.add(control);
                }
            }
            _buttons = (Button[]) buttonList.toArray(new Button[buttonList.size()]);
        }
        return _buttons;
    }

    /**
     * Gets the button.
     *
     * @param predicate
     *            the predicate
     * @param criteria
     *            the criteria
     *
     * @return the button
     */
    public Button getButton(HTMLElementPredicate predicate, Object criteria) {
        Button[] buttons = getButtons();
        for (Button button : buttons) {
            if (predicate.matchesCriteria(button, criteria)) {
                return button;
            }
        }
        return null;
    }

    /**
     * Convenience method which returns the button with the specified ID.
     *
     * @param buttonID
     *            the button ID
     *
     * @return the button with ID
     */
    public Button getButtonWithID(String buttonID) {
        return getButton(Button.WITH_ID, buttonID);
    }

    /**
     * Returns an array containing the submit buttons defined for this form.
     *
     * @return the submit buttons
     */
    public SubmitButton[] getSubmitButtons() {
        if (_submitButtons == null) {
            List<SubmitButton> buttons = getSubmitButtonVector();
            _submitButtons = buttons.toArray(new SubmitButton[buttons.size()]);
        }
        return _submitButtons;
    }

    /**
     * Returns the submit button defined in this form with the specified name. If more than one such button exists, will
     * return the first found. If no such button is found, will return null.
     *
     * @param name
     *            the name
     *
     * @return the submit button
     */
    public SubmitButton getSubmitButton(String name) {
        SubmitButton[] buttons = getSubmitButtons();
        for (SubmitButton button : buttons) {
            if (button.getName().equals(name)) {
                return button;
            }
        }
        return null;
    }

    /**
     * Returns the submit button defined in this form with the specified name and value. If more than one such button
     * exists, will return the first found. If no such button is found, will return null.
     *
     * @param name
     *            the name
     * @param value
     *            the value
     *
     * @return the submit button
     */
    public SubmitButton getSubmitButton(String name, String value) {
        SubmitButton[] buttons = getSubmitButtons();
        for (SubmitButton button : buttons) {
            if (button.getName().equals(name) && button.getValue().equals(value)) {
                return button;
            }
        }
        return null;
    }

    /**
     * Returns the submit button defined in this form with the specified ID. If more than one such button exists, will
     * return the first found. If no such button is found, will return null.
     *
     * @param ID
     *            the id
     *
     * @return the submit button with ID
     */
    public SubmitButton getSubmitButtonWithID(String ID) {
        SubmitButton[] buttons = getSubmitButtons();
        for (SubmitButton button : buttons) {
            if (button.getID().equals(ID)) {
                return button;
            }
        }
        return null;
    }

    /**
     * Creates and returns a web request which will simulate the submission of this form with a button with the
     * specified name and value.
     *
     * @param submitButtonName
     *            the submit button name
     * @param submitButtonValue
     *            the submit button value
     *
     * @return the request
     */
    public WebRequest getRequest(String submitButtonName, String submitButtonValue) {
        SubmitButton sb = getSubmitButton(submitButtonName, submitButtonValue);
        if (sb == null) {
            throw new IllegalSubmitButtonException(submitButtonName, submitButtonValue);
        }
        return getRequest(sb);
    }

    /**
     * Creates and returns a web request which will simulate the submission of this form with a button with the
     * specified name.
     *
     * @param submitButtonName
     *            the submit button name
     *
     * @return the request
     */
    public WebRequest getRequest(String submitButtonName) {
        SubmitButton sb = getSubmitButton(submitButtonName);
        if (sb == null) {
            throw new IllegalSubmitButtonException(submitButtonName, "");
        }
        return getRequest(sb);
    }

    /**
     * Creates and returns a web request which will simulate the submission of this form by pressing the specified
     * button. If the button is null, simulates the pressing of the default button.
     *
     * @param button
     *            the button
     *
     * @return the request
     */
    public WebRequest getRequest(SubmitButton button) {
        return getRequest(button, 0, 0);
    }

    /**
     * Creates and returns a web request which will simulate the submission of this form by pressing the specified
     * button. If the button is null, simulates the pressing of the default button.
     *
     * @param button
     *            - the submitbutton to be pressed - may be null
     * @param x
     *            - the x position
     * @param y
     *            - the y position
     *
     * @return the request
     */
    public WebRequest getRequest(SubmitButton button, int x, int y) {
        if (button == null) {
            button = getDefaultButton();
        }

        if (HttpUnitOptions.getParameterValuesValidated()) {
            if (button == null) {
                throw new IllegalUnnamedSubmitButtonException();
            }
            if (button.isFake()) {
                // bypass checks
            } else if (!getSubmitButtonVector().contains(button)) {
                throw new IllegalSubmitButtonException(button);
            } else if (!button.wasEnabled()) {
                // this is too late for the check of isDisabled()
                // onclick has already been done ...
                // [ 1289151 ] Order of events in button.click() is wrong
                button.throwDisabledException();
            }
        }

        SubmitButton[] buttons = getSubmitButtons();
        for (SubmitButton button2 : buttons) {
            button2.setPressed(false);
        }
        button.setPressed(true);

        if (getMethod().equalsIgnoreCase("post")) {
            return new PostMethodWebRequest(this, button, x, y);
        }
        return new GetMethodWebRequest(this, WebRequest.newParameterHolder(this), button, x, y);
    }

    /**
     * Creates and returns a web request which includes the specified button. If no button is specified, will include
     * the default button, if any. No parameter validation will be done on the returned request and no scripts will be
     * run when it is submitted.
     *
     * @param button
     *            the button
     *
     * @return the web request
     */
    public WebRequest newUnvalidatedRequest(SubmitButton button) {
        return newUnvalidatedRequest(button, 0, 0);
    }

    /**
     * Creates and returns a web request which includes the specified button and position. If no button is specified,
     * will include the default button, if any. No parameter validation will be done on the returned request and no
     * scripts will be run when it is submitted.
     *
     * @param button
     *            the button
     * @param x
     *            the x
     * @param y
     *            the y
     *
     * @return the web request
     */
    public WebRequest newUnvalidatedRequest(SubmitButton button, int x, int y) {
        if (button == null) {
            button = getDefaultButton();
        }

        SubmitButton[] buttons = getSubmitButtons();
        for (SubmitButton button2 : buttons) {
            button2.setPressed(false);
        }
        button.setPressed(true);

        if (getMethod().equalsIgnoreCase("post")) {
            return new PostMethodWebRequest(this, new UncheckedParameterHolder(this), button, x, y);
        }
        return new GetMethodWebRequest(this, new UncheckedParameterHolder(this), button, x, y);
    }

    /**
     * Gets the scripted submit request.
     *
     * @return the scripted submit request
     */
    private WebRequest getScriptedSubmitRequest() {
        SubmitButton[] buttons = getSubmitButtons();
        for (SubmitButton button : buttons) {
            button.setPressed(false);
        }

        if (getMethod().equalsIgnoreCase("post")) {
            return new PostMethodWebRequest(this);
        }
        return new GetMethodWebRequest(this);

    }

    /**
     * Returns the default value of the named parameter. If the parameter does not exist returns null.
     *
     * @param name
     *            the name
     *
     * @return the parameter value
     */
    public String getParameterValue(String name) {
        String[] values = getParameterValues(name);
        return values.length == 0 ? null : values[0];
    }

    /**
     * Returns the displayed options defined for the specified parameter name.
     *
     * @param name
     *            the name
     *
     * @return the options
     */
    public String[] getOptions(String name) {
        return getParameter(name).getOptions();
    }

    /**
     * Returns the option values defined for the specified parameter name.
     *
     * @param name
     *            the name
     *
     * @return the option values
     */
    public String[] getOptionValues(String name) {
        return getParameter(name).getOptionValues();
    }

    /**
     * Returns true if the named parameter accepts multiple values.
     *
     * @param name
     *            the name
     *
     * @return true, if is multi valued parameter
     */
    public boolean isMultiValuedParameter(String name) {
        return getParameter(name).isMultiValuedParameter();
    }

    /**
     * Returns the number of text parameters in this form with the specified name.
     *
     * @param name
     *            the name
     *
     * @return the num text parameters
     */
    public int getNumTextParameters(String name) {
        return getParameter(name).getNumTextParameters();
    }

    /**
     * Returns true if the named parameter accepts free-form text.
     *
     * @param name
     *            the name
     *
     * @return true, if is text parameter
     */
    public boolean isTextParameter(String name) {
        return getParameter(name).isTextParameter();
    }

    /**
     * Returns true if this form is to be submitted using mime encoding (the default is URL encoding).
     **/
    @Override
    public boolean isSubmitAsMime() {
        return "multipart/form-data".equalsIgnoreCase(getAttribute("enctype"));
    }

    /**
     * Gets the scriptable object.
     *
     * @return the scriptable object
     */
    public FormScriptable getScriptableObject() {
        return (FormScriptable) getScriptingHandler();
    }

    /**
     * Resets all parameters to their initial values.
     */
    public void reset() {
        if (handleEvent("onreset")) {
            resetControls();
        }
    }

    /**
     * Reset controls.
     */
    private void resetControls() {
        FormControl[] controls = getFormControls();
        for (FormControl control : controls) {
            control.reset();
        }
    }

    @Override
    public ScriptableDelegate newScriptable() {
        return new Scriptable();
    }

    // ---------------------------------- WebRequestSource methods
    // --------------------------------

    /**
     * Returns the character set encoding for this form.
     **/
    @Override
    public String getCharacterSet() {
        return _characterSet;
    }

    /**
     * Returns true if the named parameter accepts files for upload.
     **/
    @Override
    public boolean isFileParameter(String name) {
        return getParameter(name).isFileParameter();
    }

    /**
     * Returns an array containing the names of the parameters defined for this form.
     **/
    @Override
    public String[] getParameterNames() {
        List parameterNames = new ArrayList(getFormParameters().keySet());
        return (String[]) parameterNames.toArray(new String[parameterNames.size()]);
    }

    /**
     * Returns the multiple default values of the named parameter.
     **/
    @Override
    public String[] getParameterValues(String name) {
        final FormParameter parameter = getParameter(name);
        return parameter.getValues();
    }

    /**
     * Returns true if the named parameter is read-only. If more than one control exists with the same name, will return
     * true only if all such controls are read-only.
     *
     * @param name
     *            the name
     *
     * @return true, if is read only parameter
     */
    public boolean isReadOnlyParameter(String name) {
        return getParameter(name).isReadOnlyParameter();
    }

    /**
     * Returns true if the named parameter is disabled. If more than one control exists with the same name, will return
     * true only if all such controls are read-only.
     *
     * @param name
     *            the name
     *
     * @return true, if is disabled parameter
     */
    public boolean isDisabledParameter(String name) {
        return getParameter(name).isDisabledParameter();
    }

    /**
     * Returns true if the named parameter is hidden. If more than one control exists with the same name, will return
     * true only if all such controls are hidden.
     *
     * @param name
     *            the name
     *
     * @return true, if is hidden parameter
     */
    public boolean isHiddenParameter(String name) {
        return getParameter(name).isHiddenParameter();
    }

    /**
     * Creates and returns a web request which will simulate the submission of this form with an unnamed submit button.
     **/
    @Override
    public WebRequest getRequest() {
        return getRequest((SubmitButton) null);
    }

    /**
     * Creates and returns a web request based on the current state of this form. No parameter validation will be done
     * and there is no guarantee over the order of parameters transmitted.
     *
     * @return the web request
     */
    public WebRequest newUnvalidatedRequest() {
        return newUnvalidatedRequest(null);
    }

    /**
     * Records a parameter defined by including it in the destination URL. Ignores any parameters whose name matches a
     * form control.
     **/
    @Override
    protected void addPresetParameter(String name, String value) {
        FormControl[] formControls = getFormControls();
        for (FormControl formControl : formControls) {
            if (formControl.getName().equals(name)) {
                return;
            }
        }
        _presets.add(new PresetFormParameter(this, name, value));
    }

    @Override
    protected String getEmptyParameterValue() {
        return null;
    }

    // ---------------------------------- ParameterHolder methods
    // --------------------------------

    /**
     * Specifies the position at which an image button (if any) was clicked.
     **/
    @Override
    void selectImageButtonPosition(SubmitButton imageButton, int x, int y) {
        imageButton.setLocation(x, y);
    }

    /**
     * Iterates through the fixed, predefined parameters in this holder, recording them in the supplied parameter
     * processor.\ These parameters always go on the URL, no matter what encoding method is used.
     **/

    @Override
    void recordPredefinedParameters(ParameterProcessor processor) throws IOException {
        FormControl[] controls = getPresetParameters();
        for (FormControl control : controls) {
            control.addValues(processor, getCharacterSet());
        }
    }

    /**
     * Iterates through the parameters in this holder, recording them in the supplied parameter processor.
     **/
    @Override
    public void recordParameters(ParameterProcessor processor) throws IOException {
        FormControl[] controls = getFormControls();
        for (FormControl control : controls) {
            control.addValues(processor, getCharacterSet());
        }
    }

    /**
     * Removes a parameter name from this collection.
     **/
    @Override
    public void removeParameter(String name) {
        setParameter(name, NO_VALUES);
    }

    /**
     * Sets the value of a parameter in this form.
     *
     * @param name
     *            - the name of the parameter
     * @param value
     *            - the value of the parameter
     **/
    @Override
    public void setParameter(String name, String value) {
        setParameter(name, new String[] { value });
    }

    /**
     * Sets the multiple values of a parameter in this form. This is generally used when there are multiple controls
     * with the same name in the form.
     *
     * @param name
     *            the name
     * @param values
     *            the values
     */
    @Override
    public void setParameter(String name, final String[] values) {
        FormParameter parameter = getParameter(name);
        if (parameter.isUnknown()) {
            throw new NoSuchParameterException(name);
        }
        if (parameter.isFileParameter()) {
            if (values != NO_VALUES) {
                throw new InvalidFileParameterException(name, values);
            }
            parameter.setFiles(new UploadFileSpec[0]);
        } else {
            parameter.setValues(values);
        }

    }

    /**
     * Sets the multiple values of a file upload parameter in a web request.
     **/
    @Override
    public void setParameter(String name, UploadFileSpec[] files) {
        FormParameter parameter = getParameter(name);
        if (parameter == null || !parameter.isFileParameter()) {
            throw new NoSuchParameterException(name);
        }
        parameter.setFiles(files);
    }

    /**
     * Sets the single value of a file upload parameter in this form. A more convenient way to do this than using
     * {@link #setParameter(String,com.meterware.httpunit.protocol.UploadFileSpec[])}
     *
     * @param name
     *            the name
     * @param file
     *            the file
     */
    public void setParameter(String name, File file) {
        setParameter(name, new UploadFileSpec[] { new UploadFileSpec(file) });
    }

    /**
     * Toggles the value of the specified checkbox parameter.
     *
     * @param name
     *            the name of the checkbox parameter
     *
     * @throws IllegalArgumentException
     *             if the specified parameter is not a checkbox or there is more than one control with that name.
     */
    public void toggleCheckbox(String name) {
        FormParameter parameter = getParameter(name);
        if (parameter == null) {
            throw new NoSuchParameterException(name);
        }
        parameter.toggleCheckbox();
    }

    /**
     * Toggles the value of the specified checkbox parameter.
     *
     * @param name
     *            the name of the checkbox parameter
     * @param value
     *            of the checkbox parameter
     *
     * @throws IllegalArgumentException
     *             if the specified parameter is not a checkbox or if there is no checkbox with the specified name and
     *             value.
     */
    public void toggleCheckbox(String name, String value) {
        FormParameter parameter = getParameter(name);
        if (parameter == null) {
            throw new NoSuchParameterException(name);
        }
        parameter.toggleCheckbox(value);
    }

    /**
     * Sets the value of the specified checkbox parameter.
     *
     * @param name
     *            the name of the checkbox parameter
     * @param state
     *            the new state of the checkbox
     *
     * @throws IllegalArgumentException
     *             if the specified parameter is not a checkbox or there is more than one control with that name.
     */
    public void setCheckbox(String name, boolean state) {
        FormParameter parameter = getParameter(name);
        if (parameter == null) {
            throw new NoSuchParameterException(name);
        }
        parameter.setValue(state);
    }

    /**
     * Sets the value of the specified checkbox parameter.
     *
     * @param name
     *            the name of the checkbox parameter
     * @param value
     *            of the checkbox parameter
     * @param state
     *            the new state of the checkbox
     *
     * @throws IllegalArgumentException
     *             if the specified parameter is not a checkbox or if there is no checkbox with the specified name and
     *             value.
     */
    public void setCheckbox(String name, String value, boolean state) {
        FormParameter parameter = getParameter(name);
        if (parameter == null) {
            throw new NoSuchParameterException(name);
        }
        parameter.setValue(value, state);
    }

    /**
     * Scriptable implementation for the WebForm.
     */
    public class Scriptable extends HTMLElementScriptable implements NamedDelegate, IdentifiedDelegate, FormScriptable {

        /**
         * Gets the action.
         *
         * @return the action
         */
        public String getAction() {
            return WebForm.this.getAction();
        }

        @Override
        public void setAction(String newAction) {
            setDestination(newAction);
            _presetParameters = null;
        }

        /**
         * Submit.
         *
         * @throws IOException
         *             Signals that an I/O exception has occurred.
         * @throws SAXException
         *             the SAX exception
         */
        public void submit() throws IOException, SAXException {
            submitRequest(getScriptedSubmitRequest());
        }

        /**
         * Reset.
         *
         * @throws IOException
         *             Signals that an I/O exception has occurred.
         * @throws SAXException
         *             the SAX exception
         */
        public void reset() throws IOException, SAXException {
            resetControls();
        }

        /**
         * return the name of the WebForm
         *
         * @return the name
         */
        @Override
        public String getName() {
            return WebForm.this.getName().length() != 0 ? WebForm.this.getName() : WebForm.this.getID();
        }

        /**
         * return the id of the WebForm
         *
         * @return the id
         */
        @Override
        public String getID() {
            return WebForm.this.getID();
        }

        /**
         * get the Object for the given propertyName
         *
         * @param propertyName
         *            - the name of the property to get
         *
         * @return the Object for the property
         */
        @Override
        public Object get(String propertyName) {
            if (propertyName.equals("target")) {
                return getTarget();
            }
            if (propertyName.equals("action")) {
                return getAction();
            }
            if (propertyName.equals("length")) {
                return Integer.valueOf(getFormControls().length);
            }
            final FormParameter parameter = getParameter(propertyName);
            if (!parameter.isUnknown()) {
                return parameter.getScriptableObject();
            }
            FormControl control = getControlWithID(propertyName);
            return control == null ? super.get(propertyName) : control.getScriptingHandler();
        }

        /**
         * Sets the value of the named property. Will throw a runtime exception if the property does not exist or cannot
         * accept the specified value.
         *
         * @param propertyName
         *            - the name of the property
         * @param value
         *            - the new value
         **/
        @Override
        public void set(String propertyName, Object value) {
            if (propertyName.equals("target")) {
                setTargetAttribute(value.toString());
            } else if (propertyName.equals("action")) {
                setAction(value.toString());
            } else if (propertyName.equals("name")) {
                getElement().setAttribute("name", value.toString());
            } else if (value instanceof String) {
                setParameterValue(propertyName, (String) value);
            } else if (value instanceof Number) {
                setParameterValue(propertyName, HttpUnitUtils.trimmedValue((Number) value));
            } else {
                super.set(propertyName, value);
            }
        }

        @Override
        public void setParameterValue(String name, String value) {
            final Object scriptableObject = getParameter(name).getScriptableObject();
            if (scriptableObject instanceof ScriptableDelegate) {
                ((ScriptableDelegate) scriptableObject).set("value", value);
            } else if (scriptableObject instanceof ScriptableDelegate[]) {
                ((ScriptableDelegate[]) scriptableObject)[0].set("value", value);
            }
        }

        /**
         * Gets the element delegates.
         *
         * @return the element delegates
         */
        public ScriptableDelegate[] getElementDelegates() {
            FormControl[] controls = getFormControls();
            ScriptableDelegate[] result = new ScriptableDelegate[controls.length];
            for (int i = 0; i < result.length; i++) {
                result[i] = (ScriptableDelegate) controls[i].getScriptingHandler();
            }
            return result;
        }

        /**
         * Gets the elements by tag name.
         *
         * @param name
         *            the name
         *
         * @return the elements by tag name
         *
         * @throws SAXException
         *             the SAX exception
         */
        public ScriptableDelegate[] getElementsByTagName(String name) throws SAXException {
            return getDelegates(getHTMLPage().getElementsByTagName(getElement(), name));
        }

        /**
         * Instantiates a new scriptable.
         */
        Scriptable() {
            super(WebForm.this);
        }
    }

    // ---------------------------------- package members
    // --------------------------------

    /**
     * Contructs a web form given the URL of its source page and the DOM extracted from that page.
     *
     * @param response
     *            the response
     * @param baseURL
     *            the base URL
     * @param node
     *            the node
     * @param frame
     *            the frame
     * @param defaultTarget
     *            the default target
     * @param characterSet
     *            the character set
     * @param registry
     *            the registry
     */
    WebForm(WebResponse response, URL baseURL, Node node, FrameSelector frame, String defaultTarget,
            String characterSet, ElementRegistry registry) {
        super(response, node, baseURL, "action", frame, defaultTarget);
        _characterSet = characterSet;
        _registry = registry;
        _domElement = (HTMLFormElement) node;
    }

    /**
     * Returns the form control which is part of this form with the specified ID.
     *
     * @param id
     *            the id
     *
     * @return the control with ID
     */
    public FormControl getControlWithID(String id) {
        FormControl[] controls = getFormControls();
        for (FormControl control : controls) {
            if (control.getID().equals(id)) {
                return control;
            }
        }
        return null;
    }

    // ---------------------------------- private members
    // --------------------------------

    /**
     * Gets the default button.
     *
     * @return the default button
     */
    private SubmitButton getDefaultButton() {
        if (getSubmitButtons().length == 1) {
            return getSubmitButtons()[0];
        }
        return getSubmitButton("");
    }

    /**
     * get the list of submit buttons - will always contain at least one button - if the original list has none a faked
     * submit button will be added.
     *
     * @return a list with the submit buttons
     */
    private List<SubmitButton> getSubmitButtonVector() {
        if (_buttonVector == null) {
            _buttonVector = new ArrayList<>();
            FormControl[] controls = getFormControls();
            for (FormControl control : controls) {
                if (control instanceof SubmitButton) {
                    SubmitButton sb = (SubmitButton) control;
                    sb.rememberEnableState();
                    _buttonVector.add(sb);
                }
            }

            /**
             * make sure that there is always at least one submit button if none is in the list add a faked one
             */
            if (_buttonVector.isEmpty()) {
                _buttonVector.add(SubmitButton.createFakeSubmitButton(this));
            }
        }
        return _buttonVector;
    }

    /**
     * Gets the preset parameters.
     *
     * @return the preset parameters
     */
    private FormControl[] getPresetParameters() {
        if (_presetParameters == null) {
            _presets = new ArrayList<>();
            loadDestinationParameters();
            _presetParameters = (FormControl[]) _presets.toArray(new FormControl[_presets.size()]);
        }
        return _presetParameters;
    }

    /**
     * New form control.
     *
     * @param child
     *            the child
     *
     * @return the form control
     */
    FormControl newFormControl(Node child) {
        return FormControl.newFormParameter(this, child);
    }

    /**
     * Returns an array of form parameter attributes for this form.
     *
     * @return the form controls
     */
    private FormControl[] getFormControls() {
        HTMLCollection controlElements = _domElement.getElements();
        FormControl[] controls = new FormControl[controlElements.getLength()];
        for (int i = 0; i < controls.length; i++) {
            controls[i] = getControlForNode(controlElements.item(i));
        }
        return controls;
    }

    /**
     * Gets the control for node.
     *
     * @param node
     *            the node
     *
     * @return the control for node
     */
    private FormControl getControlForNode(Node node) {
        if (_registry.hasNode(node)) {
            return (FormControl) _registry.getRegisteredElement(node);
        }
        return (FormControl) _registry.registerElement(node, newFormControl(node));
    }

    /**
     * get the form parameter with the given name.
     *
     * @param name
     *            the name
     *
     * @return the form parameter with this name
     */
    public FormParameter getParameter(String name) {
        final FormParameter parameter = (FormParameter) getFormParameters().get(name);
        return parameter != null ? parameter : FormParameter.getUNKNOWN_PARAMETER();
    }

    /**
     * Returns a map of parameter name to form parameter objects. Each form parameter object represents the set of form
     * controls with a particular name. Unnamed parameters are ignored.
     *
     * @return the form parameters
     */
    private Map getFormParameters() {
        Map formParameters = new HashMap<>();
        loadFormParameters(formParameters, getPresetParameters());
        loadFormParameters(formParameters, getFormControls());
        return formParameters;
    }

    /**
     * Load form parameters.
     *
     * @param formParameters
     *            the form parameters
     * @param controls
     *            the controls
     */
    private void loadFormParameters(Map formParameters, FormControl[] controls) {
        for (FormControl control : controls) {
            if (control.getName().isEmpty()) {
                continue;
            }
            FormParameter parameter = (FormParameter) formParameters.get(control.getName());
            if (parameter == null) {
                parameter = new FormParameter();
                formParameters.put(control.getName(), parameter);
            }
            parameter.addControl(control);
        }
    }

    static {
        MATCH_NAME = (htmlElement, criteria) -> HttpUnitUtils.matches(((WebForm) htmlElement).getName(),
                (String) criteria);

    }

    // ===========================---===== exception class
    // NoSuchParameterException =========================================

    /**
     * This exception is thrown on an attempt to set a file parameter to a non file type.
     */
    class InvalidFileParameterException extends IllegalRequestParameterException {

        /** The Constant serialVersionUID. */
        private static final long serialVersionUID = 1L;

        /**
         * construct a new InvalidFileParameterException for the given parameter name and value list.
         *
         * @param parameterName
         *            the parameter name
         * @param values
         *            the values
         */
        InvalidFileParameterException(String parameterName, String[] values) {
            _parameterName = parameterName;
            _values = values;
        }

        /**
         * get the message for this exception
         */
        @Override
        public String getMessage() {
            StringBuilder valueList = new StringBuilder();
            String delim = "";
            for (String _value : _values) {
                valueList.append(delim).append("'").append(_value).append("'");
                delim = ", ";
            }
            return "The file parameter with the name '" + _parameterName
                    + "' must have type File but the string values " + valueList.append(" where supplied").toString();
        }

        /** The parameter name. */
        private String _parameterName;

        /** The values. */
        private String[] _values;
    }

    /**
     * This exception is thrown on an attempt to set a parameter to a value not permitted to it by the form.
     **/
    class NoSuchParameterException extends IllegalRequestParameterException {

        /** The Constant serialVersionUID. */
        private static final long serialVersionUID = 1L;

        /**
         * Instantiates a new no such parameter exception.
         *
         * @param parameterName
         *            the parameter name
         */
        NoSuchParameterException(String parameterName) {
            _parameterName = parameterName;
        }

        @Override
        public String getMessage() {
            return "No parameter named '" + _parameterName + "' is defined in the form";
        }

        /** The parameter name. */
        private String _parameterName;

    }

    // ============================= exception class
    // IllegalUnnamedSubmitButtonException
    // ======================================

    /**
     * This exception is thrown on an attempt to define a form request with a button not defined on that form.
     **/
    class IllegalUnnamedSubmitButtonException extends IllegalRequestParameterException {

        /** The Constant serialVersionUID. */
        private static final long serialVersionUID = 1L;

        /**
         * Instantiates a new illegal unnamed submit button exception.
         */
        IllegalUnnamedSubmitButtonException() {
        }

        @Override
        public String getMessage() {
            return "This form has more than one submit button, none unnamed. You must specify the button to be used.";
        }

    }

    // ============================= exception class
    // IllegalSubmitButtonException ======================================

    /**
     * This exception is thrown on an attempt to define a form request with a button not defined on that form.
     **/
    class IllegalSubmitButtonException extends IllegalRequestParameterException {

        /** The Constant serialVersionUID. */
        private static final long serialVersionUID = 1L;

        /**
         * Instantiates a new illegal submit button exception.
         *
         * @param button
         *            the button
         */
        IllegalSubmitButtonException(SubmitButton button) {
            _name = button.getName();
            _value = button.getValue();
        }

        /**
         * Instantiates a new illegal submit button exception.
         *
         * @param name
         *            the name
         * @param value
         *            the value
         */
        IllegalSubmitButtonException(String name, String value) {
            _name = name;
            _value = value;
        }

        @Override
        public String getMessage() {
            return "Specified submit button (name=\"" + _name + "\" value=\"" + _value + "\") not part of this form.";
        }

        /** The name. */
        private String _name;

        /** The value. */
        private String _value;

    }

    // ============================= exception class
    // IllegalUnnamedSubmitButtonException
    // ======================================

}

// ========================================== class PresetFormParameter
// =================================================

class PresetFormParameter extends FormControl {

    PresetFormParameter(WebForm form, String name, String value) {
        super(form);
        _name = name;
        _value = value;
    }

    /**
     * Returns the name of this control..
     **/
    @Override
    public String getName() {
        return _name;
    }

    /**
     * Returns true if this control is read-only.
     **/
    @Override
    public boolean isReadOnly() {
        return true;
    }

    /**
     * Returns true if this control accepts free-form text.
     **/
    @Override
    public boolean isTextControl() {
        return true;
    }

    /**
     * Remove any required values for this control from the list, throwing an exception if they are missing.
     **/
    @Override
    void claimRequiredValues(List values) {
        if (_value != null) {
            claimValueIsRequired(values, _value);
        }
    }

    @Override
    public String getType() {
        return UNDEFINED_TYPE;
    }

    /**
     * Returns the current value(s) associated with this control. These values will be transmitted to the server if the
     * control is 'successful'.
     **/
    @Override
    public String[] getValues() {
        if (_values == null) {
            _values = new String[] { _value };
        }
        return _values;
    }

    @Override
    protected void addValues(ParameterProcessor processor, String characterSet) throws IOException {
        processor.addParameter(_name, _value, characterSet);
    }

    private String _name;
    private String _value;
    private String[] _values;
}

hazendaz / httpunit / 755

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