Add bridge.ts with moduleToDbSchema, validateNode, validateEdge

src/graphs/bridge.ts

@@ -0,0 +1,194 @@
+import type { TImport, TModule, TProperties } from "@alkdev/typebox";
+import { Check, Create } from "@alkdev/typebox/value";
+
+export interface DbGraphTypeRow {
+  name: string;
+  config: Record<string, unknown>;
+}
+
+export interface DbNodeTypeRow {
+  name: string;
+  schema: Record<string, unknown>;
+}
+
+export interface DbEdgeTypeRow {
+  name: string;
+  schema: Record<string, unknown>;
+  allowedSourceTypes: string[];
+  allowedTargetTypes: string[];
+}
+
+export interface DbSchema {
+  graphType: DbGraphTypeRow;
+  nodeTypes: DbNodeTypeRow[];
+  edgeTypes: DbEdgeTypeRow[];
+}
+
+function classifyEntry(
+  name: string,
+): "config" | "node" | "edge" | "edgeConstraints" | "shared" | "base" {
+  if (name === "Config") return "config";
+  if (name === "BaseNode" || name === "BaseEdge") return "base";
+  if (name.endsWith("EdgeConstraints")) return "edgeConstraints";
+  if (name.endsWith("Node")) return "node";
+  if (name.endsWith("Edge")) return "edge";
+  if (name.endsWith("Enum")) return "shared";
+  return "shared";
+}
+
+function stripSuffix(name: string, suffix: string): string {
+  return name.slice(0, -suffix.length);
+}
+
+function getEntryNames(module: TModule<TProperties>): string[] {
+  const defs = (module as unknown as { $defs: Record<string, unknown> }).$defs;
+  const firstKey = Object.keys(defs)[0];
+  const probe = module.Import(firstKey as keyof TProperties & string);
+  return Object.keys((probe as TImport).$defs);
+}
+
+function getEntrySchema(
+  module: TModule<TProperties>,
+  entryName: string,
+): Record<string, unknown> {
+  const entryImport = module.Import(
+    entryName as keyof TProperties & string,
+  ) as TImport;
+  const defs = entryImport.$defs as Record<string, unknown>;
+  return defs[entryName] as Record<string, unknown>;
+}
+
+function extractEdgeConstraintValues(
+  constraintImport: TImport,
+): { allowedSourceTypes: string[]; allowedTargetTypes: string[] } {
+  const instance = Create(constraintImport) as Record<string, unknown>;
+  const sourceArr = Array.isArray(instance.allowedSourceTypes)
+    ? instance.allowedSourceTypes as string[]
+    : [];
+  const targetArr = Array.isArray(instance.allowedTargetTypes)
+    ? instance.allowedTargetTypes as string[]
+    : [];
+  return { allowedSourceTypes: sourceArr, allowedTargetTypes: targetArr };
+}
+
+export function moduleToDbSchema(
+  module: TModule<TProperties>,
+  name: string,
+): DbSchema {
+  const entryNames = getEntryNames(module);
+  const nodeEntries: string[] = [];
+  const edgeEntries: string[] = [];
+  const constraintEntries: string[] = [];
+  let hasConfig = false;
+
+  for (const entryName of entryNames) {
+    const role = classifyEntry(entryName);
+    switch (role) {
+      case "config":
+        hasConfig = true;
+        break;
+      case "node":
+        nodeEntries.push(entryName);
+        break;
+      case "edge":
+        edgeEntries.push(entryName);
+        break;
+      case "edgeConstraints":
+        constraintEntries.push(entryName);
+        break;
+      case "shared":
+      case "base":
+        break;
+    }
+  }
+
+  if (!hasConfig) {
+    throw new Error("Module must have a Config entry.");
+  }
+
+  const edgeShortNameMap = new Map<string, string>();
+  for (const edgeEntry of edgeEntries) {
+    edgeShortNameMap.set(stripSuffix(edgeEntry, "Edge"), edgeEntry);
+  }
+  const constraintsByEdgeType = new Map<
+    string,
+    { allowedSourceTypes: string[]; allowedTargetTypes: string[] }
+  >();
+
+  for (const constraintName of constraintEntries) {
+    const edgeShortName = stripSuffix(constraintName, "EdgeConstraints");
+    const matchedEdge = edgeShortNameMap.get(edgeShortName);
+    if (!matchedEdge) {
+      throw new Error(
+        `EdgeConstraints entry "${constraintName}" references edge type "${edgeShortName}" not found in module.`,
+      );
+    }
+    const constraintImport = module.Import(
+      constraintName as keyof TProperties & string,
+    ) as TImport;
+    const values = extractEdgeConstraintValues(constraintImport);
+    if (
+      values.allowedSourceTypes.length === 0 &&
+      values.allowedTargetTypes.length === 0
+    ) {
+      throw new Error(
+        `EdgeConstraints entry "${constraintName}" has empty allowedSourceTypes and allowedTargetTypes. Omit the entry for "no restriction".`,
+      );
+    }
+    constraintsByEdgeType.set(matchedEdge, values);
+  }
+
+  const configSchema = getEntrySchema(module, "Config");
+
+  const nodeTypes: DbNodeTypeRow[] = nodeEntries.map((entryName) => {
+    return {
+      name: stripSuffix(entryName, "Node"),
+      schema: getEntrySchema(module, entryName),
+    };
+  });
+
+  const edgeTypes: DbEdgeTypeRow[] = edgeEntries.map((entryName) => {
+    const shortName = stripSuffix(entryName, "Edge");
+    const constraints = constraintsByEdgeType.get(entryName);
+    return {
+      name: shortName,
+      schema: getEntrySchema(module, entryName),
+      allowedSourceTypes: constraints?.allowedSourceTypes ?? [],
+      allowedTargetTypes: constraints?.allowedTargetTypes ?? [],
+    };
+  });
+
+  return {
+    graphType: { name, config: configSchema },
+    nodeTypes,
+    edgeTypes,
+  };
+}
+
+export function validateNode(
+  module: TModule<TProperties>,
+  entryName: string,
+  data: unknown,
+): boolean {
+  if (!entryName.endsWith("Node") || entryName === "BaseNode") {
+    throw new Error(
+      `"${entryName}" is not a node type entry. Entry name must end in "Node" (excluding "BaseNode").`,
+    );
+  }
+  const entryImport = module.Import(entryName as keyof TProperties & string);
+  return Check(entryImport, data);
+}
+
+export function validateEdge(
+  module: TModule<TProperties>,
+  entryName: string,
+  data: unknown,
+): boolean {
+  if (!entryName.endsWith("Edge") || entryName === "BaseEdge") {
+    throw new Error(
+      `"${entryName}" is not an edge type entry. Entry name must end in "Edge" (excluding "BaseEdge").`,
+    );
+  }
+  const entryImport = module.Import(entryName as keyof TProperties & string);
+  return Check(entryImport, data);
+}

src/graphs/mod.ts

@@ -1,15 +1,24 @@
 export {
-  Metagraph,
-  GraphConfig,
-  BaseNodeAttributes,
   BaseEdgeAttributes,
+  BaseNodeAttributes,
   GRAPH_STATUS,
+  GraphConfig,
   GraphStatus,
+  Metagraph,
 } from "./modules/metagraph.ts";
 export {
-  encrypt,
   decrypt,
-  generateEncryptionKey,
-  EncryptedDataSchema,
+  encrypt,
   type EncryptedData,
+  EncryptedDataSchema,
+  generateEncryptionKey,
 } from "./crypto.ts";
+export {
+  type DbEdgeTypeRow,
+  type DbGraphTypeRow,
+  type DbNodeTypeRow,
+  type DbSchema,
+  moduleToDbSchema,
+  validateEdge,
+  validateNode,
+} from "./bridge.ts";