Simple parser that takes Prismatic/Schema in and dumps JsonSchema out. Waow!
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August 8, 2023 16:25
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Prismatic Schema to Json Schema
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| #!/usr/bin/env boot | |
| (set-env! | |
| :source-paths #{"src"} | |
| :resource-paths #{"resources"} | |
| :dependencies '[[org.clojure/clojure "1.8.0"] | |
| [prismatic/schema "1.0.5"] | |
| [org.clojure/data.json "0.2.6"]]) |
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| (ns schema | |
| (:require [schema.core :as s] | |
| [clojure.data.json :as json])) | |
| (s/defrecord SomethingElse | |
| [id :- s/Uuid | |
| config :- (s/maybe s/Str) | |
| page_id :- [s/Uuid] | |
| type :- (s/enum "webhook" "something_else")]) | |
| (s/defrecord | |
| Integration | |
| [id :- s/Uuid | |
| config :- (s/maybe s/Str) | |
| page_id :- [s/Uuid] | |
| metadata :- SomethingElse | |
| type :- (s/enum "webhook" "something_else")]) | |
| (s/explain Integration) | |
| ;; -- Output ------------------------------------------------------------------- | |
| (record schema.Integration {:id Uuid, | |
| :config (maybe Str), | |
| :page_id [Uuid], | |
| :metadata (record schema.SomethingElse {:id Uuid, | |
| :config (maybe Str), | |
| :page_id [Uuid], | |
| :type (enum "something_else" "webhook")}), | |
| :type (enum "something_else" "webhook")}) | |
| ;; -- Plumbing Code ------------------------------------------------------------ | |
| (defn plumatic-schema->json-schema [schema] | |
| "One way conversion from rich data into json schema." | |
| (cond (vector? schema) | |
| {:type "array" | |
| :items (plumatic-schema->json-schema (first schema))} | |
| (seq? schema) | |
| (condp = (first schema) | |
| 'record {:$ref (str (clojure.string/replace (second schema) "." "/") ".json")} | |
| 'maybe (plumatic-schema->json-schema (second schema)) | |
| 'enum {:type "string" | |
| :enum (rest schema)}) | |
| :default | |
| {:type (condp = schema | |
| 'Str "string" | |
| 'Uuid "string")})) | |
| (defn write-json-schema [schema] | |
| (let [[type symbol spec] (s/explain schema) | |
| required (filter #(not (is-optional (second %))) spec)] | |
| {:$schema "http://json-schema.org/draft-04/schema#" | |
| :description "Figure out how to assign this meta from defschema" | |
| :type "object" , | |
| :required (map first required) ;only use the keys | |
| :properties (into {} (for [[k v] spec] | |
| [k (plumatic-schema->json-schema v)]))})) | |
| ;; -- DEMO --------------------------------------------------------------------- | |
| (println (-> Integration | |
| write-json-schema | |
| json/write-str)) | |
| ;; -- OUTPUT -------------------------------------------------------------- | |
| (comment | |
| { | |
| "$schema": "http://json-schema.org/draft-04/schema#", | |
| "description": "Figure out how to assign this meta from defschema", | |
| "type": "object", | |
| "required": [ | |
| "id", | |
| "page_id", | |
| "metadata", | |
| "type" | |
| ], | |
| "properties": { | |
| "id": { | |
| "type": "string" | |
| }, | |
| "config": { | |
| "type": "string" | |
| }, | |
| "page_id": { | |
| "type": "array", | |
| "items": { | |
| "type": "string" | |
| } | |
| }, | |
| "metadata": { | |
| "$ref": "schema/SomethingElse.json" | |
| }, | |
| "type": { | |
| "type": "string", | |
| "enum": [ | |
| "something_else", | |
| "webhook" | |
| ] | |
| } | |
| } | |
| } | |
| ) |
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