Restrict addition of signatures

Sending an email to the primary userID to select which signatures to add when new signatures are uploaded.

src/email/email.js

@@ -53,12 +53,13 @@ class Email {
    * @param {Object} template   the email template function to use
    * @param {Object} userId     recipient user id object: { name:'Jon Smith', email:'j@smith.com', publicKeyArmored:'...' }
    * @param {string} keyId      key id of public key
+   * @param {Object} data       data used by template
    * @param {Object} origin     origin of the server
    * @yield {Object}            reponse object containing SMTP info
    */
-  async send({template, userId, keyId, origin, publicKeyArmored}) {
+  async send({template, userId, keyId, data, origin, publicKeyArmored}) {
     const compiled = template({
-      ...userId,
+      ...data,
       origin,
       keyId
     });

src/email/templates.js

@@ -18,4 +18,12 @@ function verifyRemove(ctx, {name, email, nonce, origin, keyId}) {
   };
 }
 
-module.exports = {verifyKey, verifyRemove};
+function confirmNewSigs(ctx, {name, sigsNb, nonce, origin, keyId}) {
+  const link = `${util.url(origin)}/api/v1/key?op=confirmSignatures&keyId=${keyId}&nonce=${nonce}`;
+  return {
+    subject: ctx.__('confirm_signatures_subject'),
+    text: ctx.__('confirm_signatures_text', [name, sigsNb, link, origin.host])
+  };
+}
+
+module.exports = {verifyKey, verifyRemove, confirmNewSigs};