add basic provider-functions

src/lib.rs

@@ -54,6 +54,7 @@ pub mod oauth2;
 mod param;
 pub mod peerstate;
 pub mod pgp;
+pub mod provider;
 pub mod qr;
 pub mod securejoin;
 mod simplify;

src/provider.rs

@@ -0,0 +1,80 @@
+use crate::dc_tools::EmailAddress;
+
+#[derive(Debug, Copy, Clone, PartialEq, ToPrimitive)]
+#[repr(u8)]
+pub enum Status {
+    OK = 1,
+    PREPARATION = 2,
+    BROKEN = 3,
+}
+
+#[derive(Debug)]
+#[repr(u8)]
+pub enum ServerType {
+    SMTP = 1,
+    IMAP = 2,
+}
+
+#[derive(Debug)]
+#[repr(u8)]
+pub enum ServerSocket {
+    STARTTLS = 1,
+    SSL = 2,
+}
+
+#[derive(Debug)]
+pub struct Server {
+    pub stype: ServerType,
+    pub socket: ServerSocket,
+    pub port: u16,
+    pub server: &'static str,
+    pub username: &'static str,
+}
+
+#[derive(Debug, PartialEq)]
+pub struct Provider {
+    pub domains: &'static str,
+    pub status: Status,
+    pub before_login_hint: &'static str,
+    pub overview_page: &'static str,
+}
+
+// TODO: the database will be auto-generated from the provider-db
+const DATABASE: [Provider; 3] = [
+    Provider {
+        domains: "nauta.cu",
+        status: Status::OK,
+        before_login_hint: "",
+        overview_page: "",
+    },
+    Provider {
+        domains: "outlook.com live.com",
+        status: Status::BROKEN,
+        before_login_hint: "this provider is broken, sorry :(",
+        overview_page: "https://provider.delta.chat/outlook.com",
+    },
+    Provider {
+        domains: "gmail.com",
+        status: Status::PREPARATION,
+        before_login_hint: "please enable less-secure-apps",
+        overview_page: "https://provider.delta.chat/gmail.com",
+    },
+];
+
+pub fn get_provider_info(addr: &str) -> Option<&Provider> {
+    let domain = match EmailAddress::new(addr) {
+        Ok(addr) => addr.domain,
+        Err(_err) => return None,
+    }
+    .to_lowercase();
+
+    for record in &DATABASE {
+        for record_domain in record.domains.split(" ") {
+            if record_domain == domain {
+                return Some(record);
+            }
+        }
+    }
+
+    None
+}