Redesign of the admin interface.

Main changes:
 - Splitted up settings and users into two separate pages.
 - Added verified shield when the e-mail address has been verified.
 - Added the amount of personal items in the database to the users overview.
 - Added Organizations and Diagnostics pages.
   - Shows if DNS resolving works.
   - Shows if there is a posible time drift.
   - Shows current versions of server and web-vault.
 - Optimized logo-gray.png using optipng

Items which can be added later:
 - Amount of cipher items accessible for a user, not only his personal items.
 - Amount of users per Org
 - Version update check in the diagnostics overview.
 - Copy/Pasteable runtime config which has sensitive data changed or removed for support questions either on the forum or github issues.
 - Option to delete Orgs and all its passwords (when there are no members anymore).
 - Etc....

src/api/admin.rs

@@ -23,7 +23,7 @@ pub fn routes() -> Vec<Route> {
 
     routes![
         admin_login,
-        get_users,
+        get_users_json,
         post_admin_login,
         admin_page,
         invite_user,
@@ -36,6 +36,9 @@ pub fn routes() -> Vec<Route> {
         delete_config,
         backup_db,
         test_smtp,
+        users_overview,
+        organizations_overview,
+        diagnostics,
     ]
 }
 
@@ -118,7 +121,9 @@ fn _validate_token(token: &str) -> bool {
 struct AdminTemplateData {
     page_content: String,
     version: Option<&'static str>,
-    users: Vec<Value>,
+    users: Option<Vec<Value>>,
+    organizations: Option<Vec<Value>>,
+    diagnostics: Option<Value>,
     config: Value,
     can_backup: bool,
     logged_in: bool,
@@ -126,15 +131,59 @@ struct AdminTemplateData {
 }
 
 impl AdminTemplateData {
-    fn new(users: Vec<Value>) -> Self {
+    fn new() -> Self {
         Self {
-            page_content: String::from("admin/page"),
+            page_content: String::from("admin/settings"),
             version: VERSION,
-            users,
             config: CONFIG.prepare_json(),
             can_backup: *CAN_BACKUP,
             logged_in: true,
             urlpath: CONFIG.domain_path(),
+            users: None,
+            organizations: None,
+            diagnostics: None,
+        }
+    }
+
+    fn users(users: Vec<Value>) -> Self {
+        Self {
+            page_content: String::from("admin/users"),
+            version: VERSION,
+            users: Some(users),
+            config: CONFIG.prepare_json(),
+            can_backup: *CAN_BACKUP,
+            logged_in: true,
+            urlpath: CONFIG.domain_path(),
+            organizations: None,
+            diagnostics: None,
+        }
+    }
+
+    fn organizations(organizations: Vec<Value>) -> Self {
+        Self {
+            page_content: String::from("admin/organizations"),
+            version: VERSION,
+            organizations: Some(organizations),
+            config: CONFIG.prepare_json(),
+            can_backup: *CAN_BACKUP,
+            logged_in: true,
+            urlpath: CONFIG.domain_path(),
+            users: None,
+            diagnostics: None,
+        }
+    }
+
+    fn diagnostics(diagnostics: Value) -> Self {
+        Self {
+            page_content: String::from("admin/diagnostics"),
+            version: VERSION,
+            organizations: None,
+            config: CONFIG.prepare_json(),
+            can_backup: *CAN_BACKUP,
+            logged_in: true,
+            urlpath: CONFIG.domain_path(),
+            users: None,
+            diagnostics: Some(diagnostics),
         }
     }
 
@@ -144,11 +193,8 @@ impl AdminTemplateData {
 }
 
 #[get("/", rank = 1)]
-fn admin_page(_token: AdminToken, conn: DbConn) -> ApiResult<Html<String>> {
-    let users = User::get_all(&conn);
-    let users_json: Vec<Value> = users.iter().map(|u| u.to_json(&conn)).collect();
-
-    let text = AdminTemplateData::new(users_json).render()?;
+fn admin_page(_token: AdminToken, _conn: DbConn) -> ApiResult<Html<String>> {
+    let text = AdminTemplateData::new().render()?;
     Ok(Html(text))
 }
 
@@ -195,13 +241,29 @@ fn logout(mut cookies: Cookies) -> Result<Redirect, ()> {
 }
 
 #[get("/users")]
-fn get_users(_token: AdminToken, conn: DbConn) -> JsonResult {
+fn get_users_json(_token: AdminToken, conn: DbConn) -> JsonResult {
     let users = User::get_all(&conn);
     let users_json: Vec<Value> = users.iter().map(|u| u.to_json(&conn)).collect();
 
     Ok(Json(Value::Array(users_json)))
 }
 
+#[get("/users/overview")]
+fn users_overview(_token: AdminToken, conn: DbConn) -> ApiResult<Html<String>> {
+    let users = User::get_all(&conn);
+    let users_json: Vec<Value> = users.iter()
+    .map(|u| {
+        let mut usr = u.to_json(&conn);
+        if let Some(ciphers) = Cipher::count_owned_by_user(&u.uuid, &conn) {
+            usr["cipher_count"] = json!(ciphers);
+        };
+        usr
+    }).collect();
+
+    let text = AdminTemplateData::users(users_json).render()?;
+    Ok(Html(text))
+}
+
 #[post("/users/<uuid>/delete")]
 fn delete_user(uuid: String, _token: AdminToken, conn: DbConn) -> EmptyResult {
     let user = match User::find_by_uuid(&uuid, &conn) {
@@ -242,6 +304,50 @@ fn update_revision_users(_token: AdminToken, conn: DbConn) -> EmptyResult {
     User::update_all_revisions(&conn)
 }
 
+#[get("/organizations/overview")]
+fn organizations_overview(_token: AdminToken, conn: DbConn) -> ApiResult<Html<String>> {
+    let organizations = Organization::get_all(&conn);
+    let organizations_json: Vec<Value> = organizations.iter().map(|o| o.to_json()).collect();
+
+    let text = AdminTemplateData::organizations(organizations_json).render()?;
+    Ok(Html(text))
+}
+
+#[derive(Deserialize, Serialize, Debug)]
+#[allow(non_snake_case)]
+pub struct WebVaultVersion {
+    version: String,
+}
+
+#[get("/diagnostics")]
+fn diagnostics(_token: AdminToken, _conn: DbConn) -> ApiResult<Html<String>> {
+    use std::net::ToSocketAddrs;
+    use chrono::prelude::*;
+    use crate::util::read_file_string;
+
+    let vault_version_path = format!("{}/{}", CONFIG.web_vault_folder(), "version.json");
+    let vault_version_str = read_file_string(&vault_version_path)?;
+    let web_vault_version: WebVaultVersion = serde_json::from_str(&vault_version_str)?;
+
+    let github_ips = ("github.com", 0).to_socket_addrs().map(|mut i| i.next());
+    let dns_resolved = match github_ips {
+        Ok(Some(a)) => a.ip().to_string() ,
+        _ => "Could not resolve domain name.".to_string(),
+    };
+
+    let dt = Utc::now();
+    let server_time = dt.format("%Y-%m-%d %H:%M:%S").to_string();
+
+    let diagnostics_json = json!({
+        "dns_resolved": dns_resolved,
+        "server_time": server_time,
+        "web_vault_version": web_vault_version.version,
+    });
+
+    let text = AdminTemplateData::diagnostics(diagnostics_json).render()?;
+    Ok(Html(text))
+}
+
 #[post("/config", data = "<data>")]
 fn post_config(data: Json<ConfigBuilder>, _token: AdminToken) -> EmptyResult {
     let data: ConfigBuilder = data.into_inner();