Add base wrapSelectors for OAS3; implement definitions selector for OAS3

src/core/plugins/oas3/wrap-selectors.js

@@ -0,0 +1,44 @@
+import { createSelector } from "reselect"
+import { Map } from "immutable"
+
+// Helpers
+
+function onlyOAS3(selector) {
+  return (ori, system) => (...args) => {
+    const spec = system.getSystem().specSelectors.specJson()
+    const version = spec.get("openapi")
+    if(typeof version === "string" && version.startsWith("3.0.0")) {
+      return selector(...args)
+    } else {
+      return ori(...args)
+    }
+  }
+}
+
+const state = state => {
+  return state || Map()
+}
+
+const specJson = createSelector(
+  state,
+  spec => spec.get("json", Map())
+)
+
+const specResolved = createSelector(
+  state,
+  spec => spec.get("resolved", Map())
+)
+
+const spec = state => {
+  let res = specResolved(state)
+  if(res.count() < 1)
+    res = specJson(state)
+  return res
+}
+
+// Wrappers
+
+export const definitions = onlyOAS3(createSelector(
+  spec,
+  spec => spec.getIn(["components", "schemas"]) || Map()
+))