Added the ability to define a custom footer via environment variables

Added the CUSTOM_FOOTER_TEXT and CUSTOM_FOOTER_URL environment variables.

If undefined, the default translated footer will display.

If only CUSTOM_FOOTER_TEXT is defined, only this defined text will display in place of the normal footer text.

If only CUSTOM_FOOTER_URL is defined then the defined URL will display.

If both variables are defined, the defined text will display as a link to the defined URL.

app/ui/footer.js

@@ -65,6 +65,45 @@ class Footer extends Component {
       `);
     }
 
+    // Defining a custom footer
+    var footer = [];
+    if (this.state != undefined && this.state.WEB_UI != undefined) {
+      const WEB_UI = this.state.WEB_UI;
+
+      if (WEB_UI.CUSTOM_FOOTER_URL != '' && WEB_UI.CUSTOM_FOOTER_TEXT != '') {
+        footer.push(html`
+          <li class="m-2">
+            <a href="${WEB_UI.CUSTOM_FOOTER_URL}" target="_blank">
+              ${WEB_UI.CUSTOM_FOOTER_TEXT}
+            </a>
+          </li>
+        `);
+      }
+      else if (WEB_UI.CUSTOM_FOOTER_URL != '') {
+        footer.push(html`
+          <li class="m-2">
+            <a href="${WEB_UI.CUSTOM_FOOTER_URL}" target="_blank">
+              ${WEB_UI.CUSTOM_FOOTER_URL}
+            </a>
+          </li>
+        `);
+      }
+      else if (WEB_UI.CUSTOM_FOOTER_TEXT != '') {
+        footer.push(html`
+          <li class="m-2">
+            ${WEB_UI.CUSTOM_FOOTER_TEXT}
+          </li>
+        `)
+      }
+      else  {
+        footer.push(html`
+          <li class="m-2">
+            ${translate('footerText')}
+          </li>
+        `);
+      }
+    }
+
     return html`
       <footer
         class="flex flex-col md:flex-row items-start w-full flex-none self-start p-6 md:p-8 font-medium text-xs text-grey-60 dark:text-grey-40 md:items-center justify-between"
@@ -72,7 +111,7 @@ class Footer extends Component {
         <ul
           class="flex flex-col md:flex-row items-start md:items-center md:justify-start"
         >
-          <li class="m-2">${translate('footerText')}</li>
+          ${footer}
         </ul>
         <ul
           class="flex flex-col md:flex-row items-start md:items-center md:justify-end"

server/clientConstants.js

@@ -13,6 +13,8 @@ module.exports = {
     FOOTER_CLI_URL: config.footer_cli_url,
     FOOTER_DMCA_URL: config.footer_dmca_url,
     FOOTER_SOURCE_URL: config.footer_source_url,
+    CUSTOM_FOOTER_TEXT: config.custom_footer_text,
+    CUSTOM_FOOTER_URL: config.custom_footer_url,
     COLORS: {
       PRIMARY: config.ui_color_primary,
       ACCENT: config.ui_color_accent

server/config.js

@@ -253,6 +253,16 @@ const conf = convict({
     default: 'https://github.com/timvisee/send',
     env: 'SEND_FOOTER_SOURCE_URL'
   },
+  custom_footer_text: {
+    format: String,
+    default: '',
+    env: 'CUSTOM_FOOTER_TEXT'
+  },
+  custom_footer_url: {
+    format: String,
+    default: '',
+    env: 'CUSTOM_FOOTER_URL'
+  },
   ui_color_primary: {
     format: String,
     default: '#0a84ff',