Use survey api to show survey properties

src/handlers/surveys.lisp

@@ -1,5 +1,9 @@
 (in-package :ml-survey/handlers)
 
 (define-easy-handler (surveys :uri "/") nil
-  (let ((stored-surveys (load-response (make-surveys-db-file))))
-    (ml-survey/views:surveys stored-surveys)))
+  (ml-survey/views:surveys (mapcar (lambda (x)
+                                     (make-instance 'ml-survey:survey
+                                                    :id (format nil
+                                                                "~a"
+                                                                (first x))))
+                                   (load-response (make-surveys-db-file)))))

src/package.lisp

@@ -9,6 +9,9 @@
    #:survey-data-dir-p
    #:survey-data-dir-files
    #:survey-html
+   #:survey-properties
+   #:survey-properties-title
+   #:survey-properties-description
    #:ensure-data-dir
    #:ensure-data-file-exist
    #:store-response

src/survey.lisp

@@ -35,6 +35,12 @@
 (defmethod survey-data-dir-p ((survey survey))
   (uiop:directory-exists-p (survey-data-dir survey)))
 
+(defmethod survey-properties-title ((survey survey))
+  (cdr (assoc "title" (survey-properties survey) :test #'string-equal)))
+
+(defmethod survey-properties-description ((survey survey))
+  (cdr (assoc "description" (survey-properties survey) :test #'string-equal)))
+
 (defun build-questionnaire-link (survey-id resource)
   (format nil "/survey/~a/questionnaire~a" survey-id resource))
 

src/views/surveys.lisp

@@ -1,16 +1,17 @@
 (in-package :ml-survey/views)
 
-(defun extract-title (list)
-  (cdr (assoc "title" (second list) :test #'string-equal)))
+(defun surveys-p (list)
+  "Check if all elements in `lst` are instances of the class `survey`."
+  (every (lambda (item) (typep item 'ml-survey:survey)) list))
 
-(defun extract-description (list)
-  (cdr (assoc "description" (second list) :test #'string-equal)))
-
-(defun extract-id (list)
-  (first list))
+(deftype surveys-list ()
+  '(and list (satisfies surveys-p)))
 
 (defun surveys (surveys)
-  "Generates the view to show all surveys available."
+  "Generates the view to show all surveys available.
+
+SURVEYS: List of survey objects."
+  (check-type surveys surveys-list)
   (with-page (:title "Surveys")
     (body-header "Surveys" (navbar-en))
     (:main :id "main-content"
@@ -23,9 +24,9 @@
            (:h2 :class "mb-3" "Overview")
            (:ol :class "list-group list-group-numbered"
                 (loop for survey in surveys
-                      for title = (extract-title survey)
-                      for description = (extract-description survey)
-                      for id = (extract-id survey) do
+                      for title = (ml-survey:survey-properties-title survey)
+                      for description = (ml-survey:survey-properties-description survey)
+                      for id = (ml-survey:survey-id survey) do
                         (:li :class "list-group-item d-flex justify-content-between align-items-start"
                              (:div :class "ms-2 me-auto"
                                    (:a :class "fw-bold clearfix"