[#11878] Add AccountRequest Rejection email generator.

src/main/java/teammates/common/util/EmailType.java

@@ -25,6 +25,7 @@ public enum EmailType {
     STUDENT_COURSE_REJOIN_AFTER_GOOGLE_ID_RESET("TEAMMATES: Your account has been reset for course [%s][Course ID: %s]"),
     NEW_ACCOUNT_REQUEST_ADMIN_ALERT("TEAMMATES (Action Needed): New Account Request Received"),
     NEW_ACCOUNT_REQUEST_ACKNOWLEDGEMENT("TEAMMATES: Acknowledgement of Instructor Account Request"),
+    ACCOUNT_REQUEST_REJECTION("TEAMMATES: %s"),
     INSTRUCTOR_COURSE_JOIN("TEAMMATES: Invitation to join course as an instructor [%s][Course ID: %s]"),
     INSTRUCTOR_COURSE_REJOIN_AFTER_GOOGLE_ID_RESET("TEAMMATES: Your account has been reset for course [%s][Course ID: %s]"),
     USER_COURSE_REGISTER("TEAMMATES: Registered for Course [%s][Course ID: %s]"),

src/main/java/teammates/sqllogic/api/SqlEmailGenerator.java

@@ -1029,6 +1029,18 @@ public EmailWrapper generateNewAccountRequestAcknowledgementEmail(AccountRequest
         return email;
     }
 
+    /**
+     * Generates the email to be sent to instructor when their account request has been rejected by admin.
+     */
+    public EmailWrapper generateAccountRequestRejectionEmail(AccountRequest accountRequest, String title, String content) {
+        EmailWrapper email = getEmptyEmailAddressedToEmail(accountRequest.getEmail());
+        email.setType(EmailType.ACCOUNT_REQUEST_REJECTION);
+        email.setSubjectFromType(SanitizationHelper.sanitizeTitle(title));
+        email.setContent(SanitizationHelper.sanitizeForRichText(content));
+
+        return email;
+    }
+
     /**
      * Generates the course registered email for the user with the given details in {@code course}.
      */

src/test/java/teammates/sqllogic/api/SqlEmailGeneratorTest.java

@@ -61,6 +61,29 @@ void testGenerateNewAccountRequestAcknowledgementEmail_withNoComments_generatesS
                 Config.SUPPORT_EMAIL,
                 "/instructorNewAccountRequestAcknowledgementEmailWithNoComments.html");
     }
+
+    @Test
+    void testGenerateAccountRequestRejectionEmail_withDefaultReason_generatesSuccessfully() throws IOException {
+        AccountRequest accountRequest = new AccountRequest("maul@sith.org", "Maul", "Sith Order",
+                AccountRequestStatus.PENDING, null);
+        String title = "We are Unable to Create an Account for you";
+        String content = new StringBuilder()
+                            .append("<p>Hi, Maul</p>\n")
+                            .append("<p>Thanks for your interest in using TEAMMATES. We are unable to create a TEAMMATES instructor account for you.</p>\n\n")
+                            .append("<p>\n")
+                            .append("  <strong>Reason:</strong> The email address you provided is not an 'official' email address provided by your institution.<br />\n")
+                            .append("  <strong>Remedy:</strong> Please re-submit an account request with your 'official' institution email address.\n")
+                            .append("</p>\n\n")
+                            .append("<p>If you need further clarification or would like to appeal this decision, please feel free to contact us at teammates@comp.nus.edu.sg.</p>\n")
+                            .append("<p>Regards,<br />TEAMMATES Team.</p>\n")
+                            .toString();
+
+        EmailWrapper email = sqlEmailGenerator.generateAccountRequestRejectionEmail(accountRequest, title, content);
+        verifyEmail(email, "maul@sith.org", EmailType.ACCOUNT_REQUEST_REJECTION,
+                "TEAMMATES: " + title,
+                "/instructorAccountRequestRejectionEmail.html");
+    }
+
 
     private void verifyEmail(EmailWrapper email, String expectedRecipientEmailAddress, EmailType expectedEmailType,
             String expectedSubject, String expectedEmailContentFilePathname) throws IOException {

src/test/resources/emails/instructorAccountRequestRejectionEmail.html

@@ -0,0 +1,10 @@
+<p>Hi, Maul</p>
+<p>Thanks for your interest in using TEAMMATES. We are unable to create a TEAMMATES instructor account for you.</p>
+
+<p>
+  <strong>Reason:</strong> The email address you provided is not an &#39;official&#39; email address provided by your institution.<br />
+  <strong>Remedy:</strong> Please re-submit an account request with your &#39;official&#39; institution email address.
+</p>
+
+<p>If you need further clarification or would like to appeal this decision, please feel free to contact us at teammates&#64;comp.nus.edu.sg.</p>
+<p>Regards,<br />TEAMMATES Team.</p>