reorganize is_permissible_email() into email.rs

src/channels_router.rs

@@ -9,7 +9,6 @@ use axum::{
 use axum_extra::extract::Form;
 use diesel::prelude::*;
 use rand::Rng as _;
-use regex::Regex;
 use serde::Deserialize;
 use uuid::Uuid;
 
@@ -18,7 +17,7 @@ use crate::{
     app_state::{AppState, DbConn},
     channels::{BackendConfig, Channel, EmailBackendConfig, CHANNEL_BACKEND_EMAIL},
     csrf::generate_csrf_token,
-    email::{MailSender as _, Mailer},
+    email::{is_permissible_email, MailSender as _, Mailer},
     guards,
     nav::{BreadcrumbTrail, Navbar, NavbarBuilder, NAVBAR_ITEM_CHANNELS},
     schema::channels,
@@ -374,15 +373,6 @@ async fn update_channel_email_recipient(
     )))
 }
 
-/// Returns true if the email address matches a format recognized as "valid".
-/// Not all "legal" email addresses will be accepted, but addresses that are
-/// "illegal" and/or could result in unexpected behavior should be rejected.
-fn is_permissible_email(address: &str) -> bool {
-    let re = Regex::new(r"^[a-zA-Z0-9._+-]+@([a-zA-Z0-9_-]+.)+[a-zA-Z]+$")
-        .expect("email validation regex should parse");
-    re.is_match(address)
-}
-
 #[derive(Deserialize)]
 struct VerifyEmailFormBody {
     csrf_token: String,

src/email.rs

@@ -2,12 +2,22 @@ use anyhow::{Context, Result};
 use axum::extract::FromRef;
 use futures::Future;
 use lettre::{AsyncSmtpTransport, AsyncTransport, Tokio1Executor};
+use regex::Regex;
 use serde::{Serialize, Serializer};
 
 use crate::app_state::AppState;
 
 const POSTMARK_EMAIL_BATCH_URL: &str = "https://api.postmarkapp.com/email/batch";
 
+/// Returns true if the email address matches a format recognized as "valid".
+/// Not all "legal" email addresses will be accepted, but addresses that are
+/// "illegal" and/or could result in unexpected behavior should be rejected.
+pub fn is_permissible_email(address: &str) -> bool {
+    let re = Regex::new(r"^[a-zA-Z0-9._+-]+@([a-zA-Z0-9_-]+.)+[a-zA-Z]+$")
+        .expect("email validation regex should parse");
+    re.is_match(address)
+}
+
 #[derive(Clone, Serialize)]
 pub struct Message {
     #[serde(rename = "From")]