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node_modules/effect/dist/esm/internal/differ/hashMapPatch.js

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+import * as Chunk from "../../Chunk.js";
+import * as Equal from "../../Equal.js";
+import * as Dual from "../../Function.js";
+import * as HashMap from "../../HashMap.js";
+import { Structural } from "../data.js";
+/** @internal */
+export const HashMapPatchTypeId = /*#__PURE__*/Symbol.for("effect/DifferHashMapPatch");
+function variance(a) {
+  return a;
+}
+/** @internal */
+const PatchProto = {
+  ...Structural.prototype,
+  [HashMapPatchTypeId]: {
+    _Value: variance,
+    _Key: variance,
+    _Patch: variance
+  }
+};
+const EmptyProto = /*#__PURE__*/Object.assign(/*#__PURE__*/Object.create(PatchProto), {
+  _tag: "Empty"
+});
+const _empty = /*#__PURE__*/Object.create(EmptyProto);
+/** @internal */
+export const empty = () => _empty;
+const AndThenProto = /*#__PURE__*/Object.assign(/*#__PURE__*/Object.create(PatchProto), {
+  _tag: "AndThen"
+});
+const makeAndThen = (first, second) => {
+  const o = Object.create(AndThenProto);
+  o.first = first;
+  o.second = second;
+  return o;
+};
+const AddProto = /*#__PURE__*/Object.assign(/*#__PURE__*/Object.create(PatchProto), {
+  _tag: "Add"
+});
+const makeAdd = (key, value) => {
+  const o = Object.create(AddProto);
+  o.key = key;
+  o.value = value;
+  return o;
+};
+const RemoveProto = /*#__PURE__*/Object.assign(/*#__PURE__*/Object.create(PatchProto), {
+  _tag: "Remove"
+});
+const makeRemove = key => {
+  const o = Object.create(RemoveProto);
+  o.key = key;
+  return o;
+};
+const UpdateProto = /*#__PURE__*/Object.assign(/*#__PURE__*/Object.create(PatchProto), {
+  _tag: "Update"
+});
+const makeUpdate = (key, patch) => {
+  const o = Object.create(UpdateProto);
+  o.key = key;
+  o.patch = patch;
+  return o;
+};
+/** @internal */
+export const diff = options => {
+  const [removed, patch] = HashMap.reduce([options.oldValue, empty()], ([map, patch], newValue, key) => {
+    const option = HashMap.get(key)(map);
+    switch (option._tag) {
+      case "Some":
+        {
+          const valuePatch = options.differ.diff(option.value, newValue);
+          if (Equal.equals(valuePatch, options.differ.empty)) {
+            return [HashMap.remove(key)(map), patch];
+          }
+          return [HashMap.remove(key)(map), combine(makeUpdate(key, valuePatch))(patch)];
+        }
+      case "None":
+        {
+          return [map, combine(makeAdd(key, newValue))(patch)];
+        }
+    }
+  })(options.newValue);
+  return HashMap.reduce(patch, (patch, _, key) => combine(makeRemove(key))(patch))(removed);
+};
+/** @internal */
+export const combine = /*#__PURE__*/Dual.dual(2, (self, that) => makeAndThen(self, that));
+/** @internal */
+export const patch = /*#__PURE__*/Dual.dual(3, (self, oldValue, differ) => {
+  if (self._tag === "Empty") {
+    return oldValue;
+  }
+  let map = oldValue;
+  let patches = Chunk.of(self);
+  while (Chunk.isNonEmpty(patches)) {
+    const head = Chunk.headNonEmpty(patches);
+    const tail = Chunk.tailNonEmpty(patches);
+    switch (head._tag) {
+      case "Empty":
+        {
+          patches = tail;
+          break;
+        }
+      case "AndThen":
+        {
+          patches = Chunk.prepend(head.first)(Chunk.prepend(head.second)(tail));
+          break;
+        }
+      case "Add":
+        {
+          map = HashMap.set(head.key, head.value)(map);
+          patches = tail;
+          break;
+        }
+      case "Remove":
+        {
+          map = HashMap.remove(head.key)(map);
+          patches = tail;
+          break;
+        }
+      case "Update":
+        {
+          const option = HashMap.get(head.key)(map);
+          if (option._tag === "Some") {
+            map = HashMap.set(head.key, differ.patch(head.patch, option.value))(map);
+          }
+          patches = tail;
+          break;
+        }
+    }
+  }
+  return map;
+});
+//# sourceMappingURL=hashMapPatch.js.map