Wordpress importing first pass.

plugins/import.lisp

@@ -0,0 +1,60 @@
+(asdf:oos 'asdf:load-op 'cxml)
+(asdf:oos 'asdf:load-op 'split-sequence)
+(asdf:oos 'asdf:load-op 'local-time)
+
+(defpackage :coleslaw-import
+  (:use :cl :coleslaw :cxml)
+  (:import-from :local-time #:+short-month-names+
+                            #:encode-timestamp)
+  (:import-from :split-sequence #:split-sequence))
+
+(in-package :coleslaw-import)
+
+(defgeneric import-post (service post)
+  (:documentation "Import POST into *storage*. The method to construct the POST
+object is determined by SERVICE."))
+
+(defmethod import-post ((service (eql :wordpress)) post)
+  (labels ((nodes (name)
+             (dom:get-elements-by-tag-name post name))
+           (value (node)
+             (let ((child (dom:last-child node)))
+               (when child (dom:data child))))
+           (node-val (name)
+             (let ((nodes (nodes name)))
+               (if (string= "category" name)
+                   (loop for node across nodes collecting (value node))
+                   (when (plusp (length nodes)) (value (elt nodes 0))))))
+           (public-p ()
+             (string= "publish" (node-val "wp:status")))
+           (make-timestamp (pubdate)
+             (let* ((date (split-sequence #\Space (subseq pubdate 5)))
+                    (time (split-sequence #\: (fourth date))))
+               (encode-timestamp 0
+                                 (parse-integer (third time)) ; sec
+                                 (parse-integer (second time)) ; min
+                                 (parse-integer (first time)) ; hr
+                                 (parse-integer (first date)) ; day
+                                 (position (second date) +short-month-names+
+                                           :test #'string=) ; month
+                                 (parse-integer (third date)))))) ; year
+    (when (public-p)
+      (let ((new-post (make-post (node-val "title")
+                                 (format nil "~{~A~^, ~}" (node-val "category"))
+                                 (make-timestamp (node-val "pubDate"))
+                                 (node-val "content:encoded")
+                                 :id (parse-integer (node-val "wp:post_id"))))
+            (comments (nodes "wp:comment")))
+        ;; TODO:
+        ;; add comment handling ... (when comments ...)
+        (add-post new-post (post-id new-post))))))
+
+(defgeneric import-posts (service filepath)
+  (:documentation "Import the posts (and potentially comments or other data)
+from FILEPATH, converting them to appropriate coleslaw objects and inserting
+them into *storage*. The method to parse the file is determined by SERVICE."))
+
+(defmethod import-posts ((service (eql :wordpress)) filepath)
+  (let* ((xml (cxml:parse-file filepath (cxml-dom:make-dom-builder)))
+         (posts (dom:get-elements-by-tag-name xml "item")))
+    (loop for post across posts do (import-post :wordpress post))))