Add handling of simple schemas. Fixes #53.

src/common/datomish/db.cljc

@@ -713,6 +713,10 @@
    Returns a transduced channel of [result err] pairs.
    Closes the channel when fully consumed."
   [db find options]
+  (let [unexpected (seq (clojure.set/difference (set (keys options)) #{:limit :order-by :inputs}))]
+    (when unexpected
+      (raise "Unexpected options: " unexpected {:bad-options unexpected})))
+
   (let [{:keys [limit order-by inputs]} options
         parsed (query/parse find)
         context (-> db

src/common/datomish/js.cljs

@@ -14,6 +14,7 @@
      [datomish.db-factory :as db-factory]
      [datomish.pair-chan]
      [datomish.sqlite :as sqlite]
+     [datomish.simple-schema :as simple-schema]
      [datomish.js-sqlite :as js-sqlite]
      [datomish.transact :as transact]))
 
@@ -29,6 +30,38 @@
 
 ;; Public API.
 
+(defn ^:export db [conn]
+  (transact/db conn))
+
+(defn ^:export q [db find options]
+  (let [find (cljs.reader/read-string find)
+        options (js->clj options)]
+    (take-pair-as-promise!
+      (db/<?q db find options))))
+
+(defn ^:export ensure-schema [conn simple-schema]
+  (let [simple-schema (js->clj simple-schema)]
+    (println "simple-schema: " (pr-str simple-schema))
+    (take-pair-as-promise!
+      (transact/<transact!
+        conn
+        (simple-schema/simple-schema->schema simple-schema)))))
+
+(defn js->tx-data [tx-data]
+  ;; Objects to maps.
+  ;; Arrays to arrays.
+  ;; RHS strings… well, some of them will be richer types.
+  ;; TODO
+  (println "Converting" (pr-str tx-data) "to" (pr-str (js->clj tx-data :keywordize-keys true)))
+  (println "Converting" (pr-str tx-data) "to" (pr-str (js->clj tx-data :keywordize-keys true)))
+  (js->clj tx-data))
+
+(defn ^:export transact [conn tx-data]
+  ;; Expects a JS array as input.
+  (let [tx-data (js->tx-data tx-data)]
+    (take-pair-as-promise!
+      (transact/<transact! conn tx-data))))
+
 (defn ^:export open [path]
   ;; Eventually, URI.  For now, just a plain path (no file://).
   (take-pair-as-promise!
@@ -38,10 +71,9 @@
         (let [c (transact/connection-with-db db)]
         (clj->js
           {:conn c
+           :ensureSchema (fn [simple-schema] (ensure-schema c simple-schema))
+           :transact (fn [tx-data] (transact c tx-data))
+           :q (fn [find options] (q (transact/db c) find options))
            :close (fn [] (db/close-db db))
            :toString (fn [] (str "#<DB " path ">"))
            :path path}))))))
-
-(defn ^:export q [query & sources]
-  (let [query   (cljs.reader/read-string query)]
-    (clj->js query)))

src/common/datomish/schema.cljc

@@ -208,3 +208,4 @@
   {:pre [(or (nil? schema) (map? schema))]}
   (map->Schema {:schema  (validate-schema schema)
                 :rschema (rschema schema)}))
+

src/common/datomish/simple_schema.cljc

@@ -0,0 +1,66 @@
+;; This Source Code Form is subject to the terms of the Mozilla Public
+;; License, v. 2.0. If a copy of the MPL was not distributed with this
+;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+(ns datomish.simple-schema
+  #?(:cljs
+     (:require-macros
+      [datomish.pair-chan :refer [go-pair <?]]
+      [cljs.core.async.macros :refer [go]]))
+  (:require
+   [clojure.set]
+   [datomish.util :as util
+    #?(:cljs :refer-macros :clj :refer) [raise raise-str cond-let]]
+   [datomish.db :as db]
+   [datomish.schema :as ds]
+   [datomish.sqlite :as s]
+   [datomish.sqlite-schema :as sqlite-schema]
+   #?@(:clj [[datomish.pair-chan :refer [go-pair <?]]
+             [clojure.core.async :as a :refer [chan go <! >!]]])
+   #?@(:cljs [[datomish.pair-chan]
+              [cljs.core.async :as a :refer [chan <! >!]]])))
+
+(defn- name->ident [name]
+  (when-not (and (string? name)
+                 (not (empty? name)))
+    (raise "Invalid name " name {:error :invalid-name :name name}))
+  (keyword name))
+
+(defn simple-schema-attributes->schema-parts [attrs]
+  (let [{:keys [cardinality type name unique doc fulltext]} attrs
+        value-type (when type (keyword (str "db.type/" type)))]
+
+    (when-not (and value-type
+                   (contains? ds/value-type-map value-type))
+      (raise "Invalid type " type {:error :invalid-type :type type}))
+
+    (let [unique
+          (case unique
+                "identity" :db.unique/identity
+                "value" :db.unique/value
+                nil nil
+                (raise "Invalid unique " unique
+                       {:error :invalid-unique :unique unique}))
+
+          cardinality
+          (case cardinality
+                "one" :db.cardinality/one
+                "many" :db.cardinality/many
+                nil nil
+                (raise "Invalid cardinality " cardinality
+                       {:error :invalid-cardinality :cardinality cardinality}))]
+
+      (util/assoc-if
+        {:db/valueType value-type
+         :db/ident (name->ident name)
+         :db/id (db/id-literal :db.part/user)
+         :db.install/_attribute :db.part/db}
+        :db/doc doc
+        :db/unique unique
+        :db/fulltext fulltext
+        :db/cardinality cardinality))))
+
+(defn simple-schema->schema [simple-schema]
+  (let [{:keys [name attributes]} simple-schema]
+    (map simple-schema-attributes->schema-parts attributes)))
+

src/node/datomish/core.cljs

@@ -5,9 +5,6 @@
 (ns datomish.core
   (:require [cljs.nodejs :as nodejs]))
 
-(nodejs/enable-util-print!)
-
-(defn -main [& args]
-  (println "Hello world!"))
-
+(defn -main [& args])
 (set! *main-cli-fn* -main)
+(nodejs/enable-util-print!)

test/datomish/db_test.cljc

@@ -13,6 +13,7 @@
    [datomish.db.debug :refer [<datoms-after <transactions-after <shallow-entity <fulltext-values]]
    [datomish.util :as util #?(:cljs :refer-macros :clj :refer) [raise cond-let]]
    [datomish.schema :as ds]
+   [datomish.simple-schema]
    [datomish.sqlite :as s]
    [datomish.sqlite-schema]
    [datomish.datom]
@@ -816,4 +817,37 @@
           (finally
             (<? (d/<close conn))))))))
 
+(deftest-db test-simple-schema conn
+  (let [in {:name "mystuff"
+            :attributes [{:name "foo/age"
+                          :type "long"
+                          :cardinality "one"}
+                         {:name "foo/name"
+                          :type "string"
+                          :cardinality "many"
+                          :doc "People can have many names."}
+                         {:name "foo/id"
+                          :type "string"
+                          :cardinality "one"
+                          :unique "value"}]}
+        expected [{:db/ident :foo/age
+                   :db/valueType :db.type/long
+                   :db/cardinality :db.cardinality/one
+                   :db.install/_attribute :db.part/db}
+                  {:db/ident :foo/name
+                   :db/valueType :db.type/string
+                   :db/cardinality :db.cardinality/many
+                   :db/doc "People can have many names."
+                   :db.install/_attribute :db.part/db}
+                  {:db/ident :foo/id
+                   :db/valueType :db.type/string
+                   :db/cardinality :db.cardinality/one
+                   :db/unique :db.unique/value
+                   :db.install/_attribute :db.part/db}]]
+
+    (testing "Simple schemas are expanded."
+             (is (= (map #(dissoc %1 :db/id) (datomish.simple-schema/simple-schema->schema in))
+                    expected)))))
+
+
 #_ (time (t/run-tests))