stuff

src/cljs/emptyhead/principle/crud.cljs

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+(ns emptyhead.principle.crud
+  "Implements CRUD operations on principles.
+  Since principles are ideas, 'missing' operations here are implemented in [[emptyhead.idea.crud]]."
+  (:require [emptyhead.idea.protocol :as prtc]
+            [emptyhead.idea.crud :as idea]
+            [emptyhead.idea.property :as prop]
+            [emptyhead.contract.eval :as contract]
+            [emptyhead.util.magic :as magic]))
+
+(defn make-principle
+  "Helper function to make principle object.
+  You may want `register-principle!` instead."
+  [operator & {:keys [data ext-contract ext-stages transient]
+               :or {data {} ext-contract {}
+                    ext-stages [[:principle operator]]
+                    transient true}}]
+  (hash-map :operator operator
+            :data data
+            :ext-contract ext-contract
+            :ext-stages ext-stages
+            :return {}
+            :transient (not (false? transient))))
+
+(defn register-principle!
+  "Create a principle and register it in the state.
+  Returns a reference to the created principle."
+  [operator & {:keys [data ext-contract ext-stages transient]
+               :as args}]
+    (idea/have-idea!
+     :prefix (str "principle_" (name operator) "_")
+     :properties [magic/principle-ns]
+     :data (make-principle operator args)))
+
+(defn contract
+  "Get the extension contract of a `principle`.
+  Returns the contract."
+  [principle]
+  (prtc/val-fn :ext-contract principle))
+
+(defn stages
+  "Get the extension stages of a `principle`.
+  Returns the list of stages."
+  [principle]
+  (prtc/val-fn :ext-stages principle))
+
+(defn operator
+  "Get the operator id of a `principle`.
+  Returns the operator keyword."
+  [principle]
+  (prtc/val-fn :operator principle))