refactoring

packages/core/src/utils/resolveExtensionConfig.ts

@@ -0,0 +1,35 @@
+import deepmerge from 'deepmerge'
+import Extension from '../Extension'
+import Node from '../Node'
+import Mark from '../Mark'
+
+export default function resolveExtensionConfig(
+  extension: Extension | Node | Mark,
+  name: string,
+  props = {},
+): void {
+  if (!extension.configs[name]) {
+    return
+  }
+
+  extension.config[name] = extension.configs[name]
+    .reduce((accumulator, { stategy, value: rawValue }) => {
+      const value = typeof rawValue === 'function'
+        ? rawValue(props)
+        : rawValue
+
+      if (accumulator === undefined) {
+        return value
+      }
+
+      if (stategy === 'overwrite') {
+        return value
+      }
+
+      if (stategy === 'extend') {
+        return deepmerge(accumulator, value)
+      }
+
+      return accumulator
+    }, undefined)
+}