Edit frontend footer link from admin panel configuration section magento 2

Question

I have a custom module that displays a custom link in the footer section in frontend.
Further, I have created my module specific configurations in the admin panel.

I would like to add option to admin panel for Disable/Enable the link on frontend's footer.

How can I achieve this? Please help.

I have added the footer link in frontend in view/frontend/layout/default.xml

        <referenceBlock name="footer_links">
        <block class="Magento\Framework\View\Element\Html\Link\Current" name="Name">
            <arguments>
                <argument name="label" xsi:type="string">My custom link</argument>
                <argument name="path" xsi:type="string">path/to/link</argument>
            </arguments>
        </block>

My system.xml is like,

        <!--For creating section -->
    <section id="quotes" translate="label" type="text" sortOrder="320" showInDefault="1" showInWebsite="1" showInStore="1">
        <label>Module</label>

        <!--Assign section to tab -->
        <tab>mytab</tab>
        <resource>Vendor_Module::configuration</resource>

        <!--create group for fields in section -->
        <group id="quotes" translate="label" type="text" sortOrder="5" showInDefault="1" showInWebsite="1" showInStore="1">
            <label>Group Name</label>

            <!--create text type field -->
            <field id="enabled" translate="label comment" sortOrder="7" type="select" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Enable the link</label>
                <comment>select from the dropdown</comment>

                <!-- source model which we created for drop down options -->
                <source_model>Vendor\Module\Model\Config\Source\Module</source_model>
            </field>
        </group> 
    </referenceBlock>   

The Vendor\Module\Model\Config\Source\Module contains,

    /**
 * @return array
 */
public function toOptionArray() {
    return [
        ['value' => 'Yes', 'label' => __('Yes')],
        ['value' => 'No', 'label' => __('No')],
    ];
}

Answer 1

At first add config to your module.
in file module/etc/adminhtml/system.xml add:

            <field id="active" translate="label" type="select" sortOrder="1" showInDefault="1" showInWebsite="1"
                   showInStore="1">
                <label>Enabled</label>
                <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
            </field> 

In section and group that you want to display it. It should be actually exist one for your module.

For getting value of this option you have to create Helper eg module/Helper/Admin/Config.php(or add only function if this is exist) and make constructor:

protected $_storeManager;

public function __construct(
    \Magento\Framework\App\Helper\Context $context,
    \Magento\Store\Model\StoreManagerInterface $storeManager
)
{
    $this->_storeManager = $storeManager;
    parent::__construct($context);
}

then function:

/**
 * @return bool
 */
public function isActive()
{
    return $this->scopeConfig->getValue('your_section/your_group/active');
}

Almost done.

You have to just find where link is displaying and check what value if for active option.

Answer 2

Finally, I was successful to achieve this. Posting it in case it might help someone in future.

Created a helper.

/**
 * @var \Magento\Framework\App\Config\ScopeConfigInterface
 */
protected $scopeConfig;

const XML_PATH_ENABLED = 'section/group/field';

public function __construct(\Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig) {
    $this->scopeConfig = $scopeConfig;
}

 /**
  * Sample function returning config value
  * */
public function getEnabled() {
    $storeScope = \Magento\Store\Model\ScopeInterface::SCOPE_STORE;

    return $this->scopeConfig->getValue(self::XML_PATH_ENABLED, $storeScope);
}

Called this into my template file,

$helper = $this->helper('path/to/helper');
echo $value = $helper->getEnabled();

Also in view/frontend/layout/default.xml where I added the footer link, I was missing the ifconfig. Added the same.

        <referenceBlock name="footer_links">
        <block class="Magento\Framework\View\Element\Html\Link\Current" ifconfig="section/group/field" name="name">
            <arguments>
                <argument name="label" xsi:type="string" translate="true">My custom link</argument>
                <argument name="path" xsi:type="string">path/to/link</argument>
            </arguments>
        </block>
    </referenceBlock>