Add tags command

lisp/commands.lisp

@@ -128,3 +128,17 @@ remove all tags from bookmark."
 
 Print the version number and exit."
   (format t "clark version ~A~%" version))
+
+(defcommand tags (&optional (num 0))
+    "List a number of or all tags."
+    "Usage: clark tags [<num>]
+
+Print a list of tags and the number of bookmarks tagged with it
+ordered by that number. If NUM is given, only print the first NUM
+tags."
+  (let ((num (if (integerp num) num (parse-integer num)))
+        (counter 1))
+    (dolist (tag (tag-list))
+      (format t "~30A~10D~%" (car tag) (cadr tag))
+      (if (> (incf counter) num 0)
+          (return)))))

lisp/queries.lisp

@@ -141,3 +141,12 @@
           (execute-to-list
            *db* (sql select "url"
                      from "bookmark"))))
+
+(defun tag-list ()
+  "Get a list of all tags stored."
+  (execute-to-list
+   *db* (sql select "name, COUNT(bookmark_id)"
+             from "tag"
+             join "bookmark_tag" on ("tag_id = tag.ROWID")
+             group by "tag.ROWID"
+             order by "COUNT(bookmark_id)" desc)))