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datomic.cljc
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datomic.cljc
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(ns trident.util.datomic
(:require [clojure.string :as str]
[clojure.spec.alpha :as s]
[trident.util.core :as u]
[orchestra.core :refer [defn-spec]]
[clojure.set :refer [difference]]))
(defn expand-flags [xs]
(->> xs
(map (fn [x]
(condp #(str/starts-with? %2 %1) (str x)
":db.type/" [:db/valueType x]
":db.cardinality/" [:db/cardinality x]
":db.unique/" [:db/unique x]
":db/isComponent" [:db/isComponent true]
[:db/doc x])))
(into {})))
(defn datomic-schema [schema]
(->> schema
(map (fn [[k v]] [k (expand-flags v)]))
(map (fn [[k v]]
(cond
(empty? v) {:db/ident k}
:else (merge {:db/ident k
:db/cardinality :db.cardinality/one}
v))))))
(defn datascript-schema [schema]
(->> schema
(map (fn [[k v]] [k (u/condas-> (expand-flags v) x
(not= (:db/valueType x) :db.type/ref) (dissoc x :db/valueType))]))
(remove (comp empty? second))
(into {})))
(defn stringify-eids [ds-schema datoms]
(for [[e a v] datoms]
[(str e) a (if (= :db.type/ref (get-in ds-schema [a :db/valueType]))
(str v)
v)]))
(declare translate-identifier)
(declare translate-n-identifier)
(declare translate-map-form)
(defn- translate-value [ds-schema eids k v]
(if (= :db.type/ref (get-in ds-schema [k :db/valueType]))
(translate-n-identifier ds-schema eids v)
v))
(defn- translate-lookup-ref [ds-schema eids x]
(let [[identifier value] x
identifier (translate-identifier ds-schema eids identifier)
value (translate-value ds-schema eids identifier value)]
[identifier value]))
(defn- translate-identifier [ds-schema eids x]
(cond
(coll? x) (translate-lookup-ref ds-schema eids x)
(number? x) (eids x)
:default x))
(defn- translate-n-identifier [ds-schema eids entid]
(if (string? entid)
entid
(translate-identifier ds-schema eids entid)))
(defn- translate-map-value [ds-schema eids k v]
(if (map? v)
(translate-map-form ds-schema eids v)
(translate-value ds-schema eids k v)))
(defn- translate-map-form [ds-schema eids form]
(->> form
(map (fn [[k v]]
[k (if (= :db.cardinality/many (get-in ds-schema [k :db/cardinality]))
(map #(translate-map-value ds-schema eids k %) v)
(translate-map-value ds-schema eids k v))]))
(into {})))
(defn translate-eids [ds-schema eids tx]
(u/capture ds-schema eids tx)
(let [ds-schema (assoc ds-schema :db/id {:db/valueType :db.type/ref})]
(for [form tx]
(if (map? form)
(translate-map-form ds-schema eids form)
(let [[op entid attr value :as xs] form
entid (delay (translate-n-identifier ds-schema eids entid))]
(cond
(contains? #{:db/add :db/retract} op)
[op @entid attr (translate-value ds-schema eids attr value)]
(= :db/retractEntity op) [op @entid]
:else xs))))))
(defn- kv-valid? [k v]
(or (map? v) (s/valid? k v)))
(defn wrap-vec
"Only for use with Datomic ref values"
[x]
(u/pred-> x (complement (some-fn vector? set?)) vector))
(defn-spec check-ent-spec boolean?
[req set? all set? ent map?]
(let [ks (-> ent keys set (disj :db/id))
registry (s/registry)]
(and (empty? (difference req ks))
(empty? (difference ks all))
(every? #(or (not (contains? registry %))
(every? (partial kv-valid? %) (wrap-vec (get ent %))))
ks))))
(defn ent-spec
([req opt]
(let [req (set req)
all (into req opt)]
(partial check-ent-spec req all)))
([req]
(ent-spec req nil)))
#?(:clj
(defn eval-txes [db tx]
(apply concat
(for [[op & args :as form] tx]
(if (symbol? op)
(eval-txes db (apply (u/loadf op) db args))
[form]))))
)