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(ns clojure-sql.core
(:refer-clojure :exclude [sort])
(:require [clojure.set :as set]
[clojure-sql.compiler :as c]
[clojure-sql.dsl :as d]
[clojure-sql.query :as q]
[clojure-sql.util :as u]
[clojure.walk]))
(def ^:private ^:dynamic *database-type* nil)
(defn set-database-type! [new-type]
(alter-var-root #'*database-type* (constantly new-type))
nil)
(def ^:private ^:dynamic *query-executor* (comp second vector))
(defn set-query-executor! [exec-fn]
(alter-var-root #'*query-executor* (constantly exec-fn))
nil)
(defmethod print-method clojure_sql.query.Query [query writer]
(binding [*out* writer]
(pr (c/compile *database-type* query))))
(def table #'d/table)
(def project #'d/project)
(def rename #'d/rename)
(def join #'d/join)
(def select #'d/select)
(def group #'d/group)
(def having #'d/having)
(def sort #'d/sort)
;(def take #'d/take)
;(def drop #'d/drop)
(defn run-query [query]
(assert *query-executor* "Cannot execute a query without a query executor")
(*query-executor* :query (c/compile *database-type* query)))
(defn insert! [query & records]
(assert *query-executor* "Cannot execute a query without a query executor")
(let [compiled (apply c/insert! *database-type* query records)]
(*query-executor* :insert compiled)))
(defn update! [query partial-record]
(assert *query-executor* "Cannot execute a query without a query executor")
(let [compiled (c/update! *database-type* query partial-record)]
(*query-executor* :update compiled)))
(defn delete! [query]
(assert *query-executor* "Cannot execute a query without a query executor")
(let [compiled (c/delete! *database-type* query)]
(*query-executor* :delete compiled)))
(q/set-query-deref-behaviour! run-query)
(let [users (-> (table :users)
(project [:id :username :password-hash]))]
(insert! (-> users
(project [:username]))
{:username "john"}
{:username "not-john"}
{:username "bleep bloop"}))
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