Model complete distribution board subtrees

src/domain/models/distribution-board-subtree-project-command.model.ts

@@ -0,0 +1,86 @@
+import type { SerializedProjectCommand } from "./project-command.model.js";
+import {
+  assertDistributionBoardSubtreeSnapshot,
+  type DistributionBoardSubtreeSnapshot,
+} from "./distribution-board-subtree-snapshot.model.js";
+
+export const distributionBoardInsertSubtreeCommandType =
+  "distribution-board.insert-subtree" as const;
+export const distributionBoardDeleteSubtreeCommandType =
+  "distribution-board.delete-subtree" as const;
+export const distributionBoardSubtreeCommandSchemaVersion = 1 as const;
+
+interface Payload {
+  snapshot: DistributionBoardSubtreeSnapshot;
+}
+
+export interface DistributionBoardInsertSubtreeProjectCommand
+  extends SerializedProjectCommand<Payload> {
+  schemaVersion: typeof distributionBoardSubtreeCommandSchemaVersion;
+  type: typeof distributionBoardInsertSubtreeCommandType;
+}
+
+export interface DistributionBoardDeleteSubtreeProjectCommand
+  extends SerializedProjectCommand<Payload> {
+  schemaVersion: typeof distributionBoardSubtreeCommandSchemaVersion;
+  type: typeof distributionBoardDeleteSubtreeCommandType;
+}
+
+export type DistributionBoardSubtreeProjectCommand =
+  | DistributionBoardInsertSubtreeProjectCommand
+  | DistributionBoardDeleteSubtreeProjectCommand;
+
+export function createDistributionBoardInsertSubtreeProjectCommand(
+  snapshot: DistributionBoardSubtreeSnapshot
+): DistributionBoardInsertSubtreeProjectCommand {
+  const command: DistributionBoardInsertSubtreeProjectCommand = {
+    schemaVersion: distributionBoardSubtreeCommandSchemaVersion,
+    type: distributionBoardInsertSubtreeCommandType,
+    payload: { snapshot },
+  };
+  assertDistributionBoardInsertSubtreeProjectCommand(command);
+  return command;
+}
+
+export function createDistributionBoardDeleteSubtreeProjectCommand(
+  snapshot: DistributionBoardSubtreeSnapshot
+): DistributionBoardDeleteSubtreeProjectCommand {
+  const command: DistributionBoardDeleteSubtreeProjectCommand = {
+    schemaVersion: distributionBoardSubtreeCommandSchemaVersion,
+    type: distributionBoardDeleteSubtreeCommandType,
+    payload: { snapshot },
+  };
+  assertDistributionBoardDeleteSubtreeProjectCommand(command);
+  return command;
+}
+
+export function assertDistributionBoardInsertSubtreeProjectCommand(
+  command: SerializedProjectCommand<unknown>
+): asserts command is DistributionBoardInsertSubtreeProjectCommand {
+  assertCommand(command, distributionBoardInsertSubtreeCommandType);
+}
+
+export function assertDistributionBoardDeleteSubtreeProjectCommand(
+  command: SerializedProjectCommand<unknown>
+): asserts command is DistributionBoardDeleteSubtreeProjectCommand {
+  assertCommand(command, distributionBoardDeleteSubtreeCommandType);
+}
+
+function assertCommand(
+  command: SerializedProjectCommand<unknown>,
+  type: DistributionBoardSubtreeProjectCommand["type"]
+) {
+  if (
+    command.schemaVersion !== distributionBoardSubtreeCommandSchemaVersion ||
+    command.type !== type ||
+    !isPlainObject(command.payload) ||
+    Object.keys(command.payload).length !== 1
+  ) {
+    throw new Error("Unsupported distribution-board subtree command.");
+  }
+  assertDistributionBoardSubtreeSnapshot(command.payload.snapshot);
+}
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  return value !== null && typeof value === "object" && !Array.isArray(value);
+}