Change transplant to allow for an arbitrary eq-relation.

clj/shame.clj

;; todo manipulation
(defn get-by [map-coll k v]
  (first (drop-while #(not= (k %) v) map-coll)))
(defn eq-by-key [key m1 m2]
  (= (key m1) (key m2)))
(defn same-name [m1 m2]
  (eq-by-key :name m1 m2))
(defn transplant [item association from to & [eql-rel]]
  "Transplants an item in a map of vectors from one key to another."
  (let [eql-rel (or eql-rel =)])
  (assoc association
         from (vec (filter #(not ((or eql-rel =) item %)) (from association)))
         to   (conj (to association) item)))
(defn add-item [item shaming]
  "Try adding an item to the shaming. If the maximum number of items is
   exceeeded, return the original shaming."
      (assoc-in shaming [:current c] item)
      shaming))) ; FIXME: is that the clojure way of doing it?
(defn get-by [map-coll k v]
  (first (drop-while #(not= (k %) v) map-coll)))
(defn transplant [item association from to]
  "Transplants an item in a map of vectors from one key to another."
  (assoc association
         from (vec (filter #(not= item %) (from association)))
         to   (conj (to association) item)))
(defn close-item [item-name status shaming]
  (let [item (get-by (:current shaming) :name item-name)
        item (assoc item :closed-at (java.util.Date.))]
    (transplant item shaming :current :past)))
    (transplant item shaming :current :past same-name)))
(defn resurrect-item [item-name shaming]
  (let [item (get-by (:past shaming) :name item-name)
        item (assoc item :started-at (java.util.Date.))]
    (transplant item shaming :past :current)))
    (transplant item shaming :past :current same-name)))
;; references (for "mutating" the todo-list)