feat: db: email_exists port

src/identity/application/port/output/db/email_exists.rs

@@ -0,0 +1,43 @@
+// SPDX-FileCopyrightText: 2024 Aravinth Manivannan <realaravinth@batsense.net>
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+use mockall::predicate::*;
+use mockall::*;
+
+use super::errors::*;
+
+#[cfg(test)]
+#[allow(unused_imports)]
+pub use tests::*;
+
+#[automock]
+#[async_trait::async_trait]
+pub trait EmailExistsOutDBPort: Send + Sync {
+    async fn email_exists(&self, email: &str) -> OutDBPortResult<bool>;
+}
+
+pub type EmailExistsOutDBPortObj = std::sync::Arc<dyn EmailExistsOutDBPort>;
+
+#[cfg(test)]
+pub mod tests {
+    use super::*;
+
+    use std::sync::Arc;
+
+    pub fn mock_email_exists_db_port(
+        times: Option<usize>,
+        returning: bool,
+    ) -> EmailExistsOutDBPortObj {
+        let mut m = MockEmailExistsOutDBPort::new();
+        if let Some(times) = times {
+            m.expect_email_exists()
+                .times(times)
+                .returning(move |_| Ok(returning));
+        } else {
+            m.expect_email_exists().returning(move |_| Ok(returning));
+        }
+
+        Arc::new(m)
+    }
+}