feat: Implement a command for issuing password reset links

src/service/config/mod.rs

@@ -6,6 +6,7 @@ use conduwuit::{
 	config::{Config, check},
 	error, implement,
 };
+use url::Url;
 
 use crate::registration_tokens::{ValidToken, ValidTokenSource};
 
@@ -23,6 +24,18 @@ impl Service {
 			.clone()
 			.map(|token| ValidToken { token, source: ValidTokenSource::Config })
 	}
+
+	/// Get the base domain to use for user-facing URLs.
+	#[must_use]
+	pub fn get_client_domain(&self) -> Url {
+		self.well_known.client.clone().unwrap_or_else(|| {
+			let host = self.server_name.host();
+			format!("https://{host}")
+				.as_str()
+				.try_into()
+				.expect("server name should be a valid host")
+		})
+	}
 }
 
 #[async_trait]

src/service/password_reset/mod.rs

@@ -8,6 +8,8 @@ use ruma::OwnedUserId;
 
 use crate::{Dep, globals, users};
 
+pub const PASSWORD_RESET_PATH: &str = "/_continuwuity/password_reset";
+pub const RESET_TOKEN_QUERY_PARAM: &str = "token";
 const RESET_TOKEN_LENGTH: usize = 32;
 
 pub struct Service {
@@ -52,6 +54,10 @@ impl Service {
 			return Err!("Cannot issue a password reset token for remote user {user}");
 		}
 
+		if user == self.services.globals.server_user {
+			return Err!("Cannot issue a password reset token for the server user");
+		}
+
 		if self.services.users.origin(&user).await? != "password" {
 			return Err!("Cannot issue a password reset token for non-internal user {user}");
 		}