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node_modules/effect/dist/esm/internal/supervisor/patch.js

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+import * as Chunk from "../../Chunk.js";
+import * as Differ from "../../Differ.js";
+import * as Equal from "../../Equal.js";
+import { pipe } from "../../Function.js";
+import * as HashSet from "../../HashSet.js";
+import * as supervisor from "../supervisor.js";
+/** @internal */
+export const OP_EMPTY = "Empty";
+/** @internal */
+export const OP_ADD_SUPERVISOR = "AddSupervisor";
+/** @internal */
+export const OP_REMOVE_SUPERVISOR = "RemoveSupervisor";
+/** @internal */
+export const OP_AND_THEN = "AndThen";
+/**
+ * The empty `SupervisorPatch`.
+ *
+ * @internal
+ */
+export const empty = {
+  _tag: OP_EMPTY
+};
+/**
+ * Combines two patches to produce a new patch that describes applying the
+ * updates from this patch and then the updates from the specified patch.
+ *
+ * @internal
+ */
+export const combine = (self, that) => {
+  return {
+    _tag: OP_AND_THEN,
+    first: self,
+    second: that
+  };
+};
+/**
+ * Applies a `SupervisorPatch` to a `Supervisor` to produce a new `Supervisor`.
+ *
+ * @internal
+ */
+export const patch = (self, supervisor) => {
+  return patchLoop(supervisor, Chunk.of(self));
+};
+/** @internal */
+const patchLoop = (_supervisor, _patches) => {
+  let supervisor = _supervisor;
+  let patches = _patches;
+  while (Chunk.isNonEmpty(patches)) {
+    const head = Chunk.headNonEmpty(patches);
+    switch (head._tag) {
+      case OP_EMPTY:
+        {
+          patches = Chunk.tailNonEmpty(patches);
+          break;
+        }
+      case OP_ADD_SUPERVISOR:
+        {
+          supervisor = supervisor.zip(head.supervisor);
+          patches = Chunk.tailNonEmpty(patches);
+          break;
+        }
+      case OP_REMOVE_SUPERVISOR:
+        {
+          supervisor = removeSupervisor(supervisor, head.supervisor);
+          patches = Chunk.tailNonEmpty(patches);
+          break;
+        }
+      case OP_AND_THEN:
+        {
+          patches = Chunk.prepend(head.first)(Chunk.prepend(head.second)(Chunk.tailNonEmpty(patches)));
+          break;
+        }
+    }
+  }
+  return supervisor;
+};
+/** @internal */
+const removeSupervisor = (self, that) => {
+  if (Equal.equals(self, that)) {
+    return supervisor.none;
+  } else {
+    if (supervisor.isZip(self)) {
+      return removeSupervisor(self.left, that).zip(removeSupervisor(self.right, that));
+    } else {
+      return self;
+    }
+  }
+};
+/** @internal */
+const toSet = self => {
+  if (Equal.equals(self, supervisor.none)) {
+    return HashSet.empty();
+  } else {
+    if (supervisor.isZip(self)) {
+      return pipe(toSet(self.left), HashSet.union(toSet(self.right)));
+    } else {
+      return HashSet.make(self);
+    }
+  }
+};
+/** @internal */
+export const diff = (oldValue, newValue) => {
+  if (Equal.equals(oldValue, newValue)) {
+    return empty;
+  }
+  const oldSupervisors = toSet(oldValue);
+  const newSupervisors = toSet(newValue);
+  const added = pipe(newSupervisors, HashSet.difference(oldSupervisors), HashSet.reduce(empty, (patch, supervisor) => combine(patch, {
+    _tag: OP_ADD_SUPERVISOR,
+    supervisor
+  })));
+  const removed = pipe(oldSupervisors, HashSet.difference(newSupervisors), HashSet.reduce(empty, (patch, supervisor) => combine(patch, {
+    _tag: OP_REMOVE_SUPERVISOR,
+    supervisor
+  })));
+  return combine(added, removed);
+};
+/** @internal */
+export const differ = /*#__PURE__*/Differ.make({
+  empty,
+  patch,
+  combine,
+  diff
+});
+//# sourceMappingURL=patch.js.map