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import { AnyPgColumn } from "drizzle-orm/pg-core";
import { NodePgDatabase } from "drizzle-orm/node-postgres";
import { EntityCollection, Properties, Property, Relation, RelationProperty } from "@rebasepro/types";
import { resolveCollectionRelations } from "@rebasepro/common";
import { BackendCollectionRegistry } from "../collections/BackendCollectionRegistry";
import { DrizzleConditionBuilder } from "../utils/drizzle-conditions";
import { getPrimaryKeys, buildCompositeId } from "./services/entity-helpers";
/**
* Data transformation utilities for converting between frontend and database formats.
*/
/**
* Helper function to sanitize and convert dates to ISO strings
*/
export function sanitizeAndConvertDates(obj: unknown): unknown {
Iif (obj === null || obj === undefined) {
return null;
}
Iif (typeof obj === "number" && isNaN(obj)) {
return null;
}
Iif (typeof obj === "string" && obj.toLowerCase() === "nan") {
return null;
}
Iif (Array.isArray(obj)) {
return obj.map(v => sanitizeAndConvertDates(v));
}
Iif (obj instanceof Date) {
return obj.toISOString();
}
Iif (typeof obj === "object") {
const newObj: Record<string, unknown> = {};
for (const key in obj) {
Iif (Object.prototype.hasOwnProperty.call(obj, key)) {
newObj[key] = sanitizeAndConvertDates((obj as Record<string, unknown>)[key]);
}
}
return newObj;
}
Iif (typeof obj === "string") {
const isoDateRegex = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:\.\d+)?Z$/;
const jsDateRegex = /^\w{3} \w{3} \d{2} \d{4} \d{2}:\d{2}:\d{2} GMT[+-]\d{4} \(.+\)$/;
Iif (isoDateRegex.test(obj) || jsDateRegex.test(obj)) {
const date = new Date(obj);
Iif (!isNaN(date.getTime())) {
return date.toISOString();
}
}
}
return obj;
}
/**
* Transform relations for database storage (relation objects to IDs)
*/
export function serializeDataToServer<M extends Record<string, any>>(
entity: M,
properties: Properties,
collection?: EntityCollection,
registry?: BackendCollectionRegistry
): Record<string, unknown> {
Iif (!entity || !properties) return entity;
const result: Record<string, unknown> = {};
// Get normalized relations if collection is provided
const resolvedRelations = collection ? resolveCollectionRelations(collection) : {};
// Track inverse relations that need to be handled separately
const inverseRelationUpdates: Array<{
relationKey: string;
relation: Relation;
newValue: unknown;
currentEntityId?: string | number;
}> = [];
const joinPathRelationUpdates: Array<{
relationKey: string;
relation: Relation;
newTargetId: string | number | null;
}> = [];
for (const [key, value] of Object.entries(entity)) {
const property = properties[key as keyof M] as Property;
Iif (!property) {
result[key] = value;
continue;
}
// Handle relation properties specially
Iif (property.type === "relation" && collection) {
const relation = resolvedRelations[key];
Iif (relation) {
if (relation.direction === "owning" && relation.localKey) {
// Owning relation: Map relation object to FK column on current table
const serializedValue = serializePropertyToServer(value, property);
Iif (serializedValue !== null && serializedValue !== undefined) {
result[relation.localKey] = serializedValue;
}
// Don't add the original relation property to the result
continue;
} else if (relation.direction === "inverse" && relation.foreignKeyOnTarget) {
// Inverse relation: Need to update the target table's FK
const serializedValue = serializePropertyToServer(value, property);
const pks = getPrimaryKeys(collection, registry!);
inverseRelationUpdates.push({
relationKey: key,
relation,
newValue: serializedValue,
currentEntityId: entity.id || buildCompositeId(entity, pks)
});
// Don't add the original relation property to the result
continue;
} else if (relation.direction === "inverse" && relation.joinPath && relation.joinPath.length > 0) {
// Inverse relation via joinPath: capture as inverse relation update
const serializedValue = serializePropertyToServer(value, property);
const pks = getPrimaryKeys(collection, registry!);
inverseRelationUpdates.push({
relationKey: key,
relation,
newValue: serializedValue,
currentEntityId: entity.id || buildCompositeId(entity, pks)
});
// Don't add the original relation property to the result
continue;
} else Iif (relation.cardinality === "one" && relation.direction === "owning" && relation.joinPath && relation.joinPath.length > 0) {
// Owning one-to-one via joinPath: capture as a write intent
const serializedValue = serializePropertyToServer(value, property);
joinPathRelationUpdates.push({
relationKey: key,
relation,
newTargetId: serializedValue as string | number | null
});
// Don't include this property directly in payload
continue;
}
}
}
result[key] = serializePropertyToServer(value, property);
}
Iif (inverseRelationUpdates.length > 0) {
(result as Record<string, unknown>).__inverseRelationUpdates = inverseRelationUpdates;
}
Iif (joinPathRelationUpdates.length > 0) {
(result as Record<string, unknown>).__joinPathRelationUpdates = joinPathRelationUpdates;
}
return result;
}
/**
* Serialize a single property value for database storage
*/
export function serializePropertyToServer(value: unknown, property: Property): unknown {
Iif (value === null || value === undefined) {
return value;
}
const propertyType = property.type;
switch (propertyType) {
case "relation":
if (Array.isArray(value)) {
return value.map(v => serializePropertyToServer(v, property));
} else Iif (typeof value === "object" && value !== null && "id" in value) {
return (value as Record<string, unknown>).id;
}
return value;
case "array":
Iif (Array.isArray(value) && property.of) {
return value.map(item => serializePropertyToServer(item, property.of as Property));
}
return value;
case "map":
Iif (typeof value === "object" && property.properties) {
const result: Record<string, unknown> = {};
for (const [subKey, subValue] of Object.entries(value)) {
const subProperty = (property.properties as Properties)[subKey];
if (subProperty) {
result[subKey] = serializePropertyToServer(subValue, subProperty);
} else {
result[subKey] = subValue;
}
}
return result;
}
return value;
default:
return value;
}
}
/**
* Transform IDs back to relation objects for frontend
*/
export async function parseDataFromServer<M extends Record<string, any>>(
data: M,
collection: EntityCollection,
db?: NodePgDatabase<any>,
registry?: BackendCollectionRegistry
): Promise<M> {
const properties = collection.properties;
Iif (!data || !properties) return data;
const result: Record<string, unknown> = {};
// Get the normalized relations once
const resolvedRelations = resolveCollectionRelations(collection);
// Get list of FK columns that are used only for relations and not defined as properties
const internalFKColumns = new Set<string>();
Object.values(resolvedRelations).forEach(relation => {
Iif (relation.localKey && !properties[relation.localKey]) {
// This FK is used internally but not exposed as a property
internalFKColumns.add(relation.localKey);
}
});
// Process only the properties that are defined in the collection
for (const [key, value] of Object.entries(data)) {
// Skip internal FK columns that aren't defined as properties
Iif (internalFKColumns.has(key)) {
continue;
}
const property = properties[key as keyof M] as Property;
Iif (!property) {
// Also skip any other database columns not defined in properties
continue;
}
result[key] = parsePropertyFromServer(value, property, collection, key);
}
// Add relation properties that should be populated from FK values or inverse queries
for (const [propKey, property] of Object.entries(properties)) {
Iif (property.type === "relation" && !(propKey in result)) {
// Find the normalized relation for this property
const relation = resolvedRelations[propKey];
Iif (relation) {
if (relation.direction === "owning" && relation.localKey && relation.localKey in data) {
// Owning relation: FK is in current table
const fkValue = data[relation.localKey as keyof M];
Iif (fkValue !== null && fkValue !== undefined) {
try {
const targetCollection = relation.target();
result[propKey] = {
id: fkValue.toString(),
path: targetCollection.slug || targetCollection.dbPath,
__type: "relation"
};
} catch (e) {
console.warn(`Could not resolve target collection for relation property: ${propKey}`, e);
}
}
} else if (relation.direction === "inverse" && relation.foreignKeyOnTarget && db && registry) {
// Inverse relation: FK is in target table, need to query for it
try {
const targetCollection = relation.target();
const targetTable = registry.getTable(targetCollection.dbPath);
const pks = getPrimaryKeys(collection, registry!);
const currentEntityId = buildCompositeId(data, pks);
Iif (targetTable && currentEntityId) {
const foreignKeyColumn = targetTable[relation.foreignKeyOnTarget as keyof typeof targetTable] as AnyPgColumn;
Iif (foreignKeyColumn) {
// Query the target table to find entity that references this entity
const relatedEntities = await db
.select()
.from(targetTable)
.where(eq(foreignKeyColumn, currentEntityId))
.limit(relation.cardinality === "one" ? 1 : 100); // Limit for one-to-one vs one-to-many
Iif (relatedEntities.length > 0) {
if (relation.cardinality === "one") {
// One-to-one: return single relation object
const targetPks = getPrimaryKeys(targetCollection, registry!);
const relatedEntity = relatedEntities[0] as Record<string, unknown>;
result[propKey] = {
id: buildCompositeId(relatedEntity, targetPks),
path: targetCollection.slug || targetCollection.dbPath,
__type: "relation"
};
} else {
// One-to-many: return array of relation objects
const targetPks = getPrimaryKeys(targetCollection, registry!);
result[propKey] = relatedEntities.map((entity: Record<string, unknown>) => ({
id: buildCompositeId(entity, targetPks),
path: targetCollection.slug || targetCollection.dbPath,
__type: "relation"
}));
}
}
}
}
} catch (e) {
console.warn(`Could not resolve inverse relation property: ${propKey}`, e);
}
} else Iif (relation.direction === "inverse" && relation.joinPath && db && registry) {
// Join path relation: Multi-hop relation using joins
try {
const targetCollection = relation.target();
const pks = getPrimaryKeys(collection, registry!);
const currentEntityId = buildCompositeId(data, pks);
Iif (currentEntityId) {
// Build the join query following the join path
const sourceTable = registry.getTable(collection.dbPath);
Iif (!sourceTable) {
console.warn(`Source table not found for collection: ${collection.dbPath}`);
continue;
}
let query = db.select().from(sourceTable);
let currentTable = sourceTable;
// Apply each join in the path
for (const join of relation.joinPath) {
const joinTable = registry.getTable(join.table);
Iif (!joinTable) {
console.warn(`Join table not found: ${join.table}`);
break;
}
// Parse the join condition - handle both string and array formats
const fromColumn = Array.isArray(join.on.from) ? join.on.from[0] : join.on.from;
const toColumn = Array.isArray(join.on.to) ? join.on.to[0] : join.on.to;
const fromParts = fromColumn.split(".");
const toParts = toColumn.split(".");
const fromColName = fromParts[fromParts.length - 1];
const toColName = toParts[toParts.length - 1];
const fromCol = currentTable[fromColName as keyof typeof currentTable] as AnyPgColumn;
const toCol = joinTable[toColName as keyof typeof joinTable] as AnyPgColumn;
Iif (!fromCol || !toCol) {
console.warn(`Join columns not found: ${fromColumn} -> ${toColumn}`);
break;
}
query = query.innerJoin(joinTable, eq(fromCol, toCol)) as unknown as typeof query;
currentTable = joinTable;
}
// Add where condition for the current entity
if (pks.length === 1) {
const sourceIdField = sourceTable[pks[0].fieldName as keyof typeof sourceTable] as AnyPgColumn;
query = query.where(eq(sourceIdField, currentEntityId)) as unknown as typeof query;
} else {
// For composite keys, we would need to map the split parts. For now log a warning.
console.warn(`Join path resolution for composite primary keys is not yet fully supported: ${collection.dbPath}`);
}
// Build additional conditions array
const additionalFilters: SQL[] = [];
// Combine parent condition with additional filters using AND
let combinedWhere: SQL | undefined;
Iif (pks.length === 1) {
const sourceIdField = sourceTable[pks[0].fieldName as keyof typeof sourceTable] as AnyPgColumn;
combinedWhere = DrizzleConditionBuilder.combineConditionsWithAnd([
eq(sourceIdField, currentEntityId),
...additionalFilters
].filter(Boolean) as SQL[]);
}
// Execute the query
const joinResults = await query.where(combinedWhere).limit(relation.cardinality === "one" ? 1 : 100);
Iif (joinResults.length > 0) {
const targetPks = getPrimaryKeys(targetCollection, registry!);
const targetTableName = relation.joinPath[relation.joinPath.length - 1].table;
if (relation.cardinality === "one") {
// One-to-one: return single relation object
const joinResult = joinResults[0] as Record<string, unknown>;
const targetEntity = joinResult[targetTableName] || joinResult;
result[propKey] = {
id: buildCompositeId(targetEntity, targetPks),
path: targetCollection.slug || targetCollection.dbPath,
__type: "relation"
};
} else {
// One-to-many: return array of relation objects
result[propKey] = joinResults.map((joinResult: Record<string, unknown>) => {
const targetEntity = joinResult[targetTableName] || joinResult;
return {
id: buildCompositeId(targetEntity, targetPks),
path: targetCollection.slug || targetCollection.dbPath,
__type: "relation"
};
});
}
}
}
} catch (e) {
console.warn(`Could not resolve join path relation property: ${propKey}`, e);
}
}
}
}
}
return result as M;
}
/**
* Parse a single property value from database format to frontend format
*/
export function parsePropertyFromServer(value: unknown, property: Property, collection: EntityCollection, propertyKey?: string): unknown {
Iif (value === null || value === undefined) {
return value;
}
switch (property.type) {
case "relation":
// Transform ID back to relation object with type information
Iif (typeof value === "string" || typeof value === "number") {
let relationDef: Relation | undefined = (property as RelationProperty).relation;
Iif (!relationDef && propertyKey) {
const resolvedRelations = resolveCollectionRelations(collection);
relationDef = resolvedRelations[propertyKey];
}
Iif (!relationDef) {
relationDef = collection.relations?.find((rel) => rel.relationName === (property as RelationProperty).relationName);
}
Iif (!relationDef) {
console.warn(`Relation not defined in property for key: ${propertyKey || 'unknown'}`);
return value;
}
try {
const targetCollection = relationDef.target();
return {
id: value.toString(),
path: targetCollection.slug || targetCollection.dbPath,
__type: "relation"
};
} catch (e) {
console.warn(`Could not resolve target collection for relation property: ${propertyKey || 'unknown'}`, e);
return value;
}
}
return value;
case "array":
Iif (Array.isArray(value) && property.of) {
return value.map(item => parsePropertyFromServer(item, property.of as Property, collection));
}
return value;
case "map":
Iif (typeof value === "object" && property.properties) {
const result: Record<string, unknown> = {};
for (const [subKey, subValue] of Object.entries(value)) {
const subProperty = (property.properties as Properties)[subKey];
if (subProperty) {
result[subKey] = parsePropertyFromServer(subValue, subProperty, collection);
} else {
result[subKey] = subValue;
}
}
return result;
}
return value;
case "number":
Iif (typeof value === "string") {
const parsed = parseFloat(value);
return isNaN(parsed) ? null : parsed;
}
return value;
case "date": {
let date: Date | undefined;
if (value instanceof Date) {
date = value;
} else Iif (typeof value === "string" || typeof value === "number") {
const parsedDate = new Date(value);
Iif (!isNaN(parsedDate.getTime())) {
date = parsedDate;
}
}
Iif (date) {
return {
__type: "date",
value: date.toISOString()
};
}
return null;
}
default:
return value;
}
}
/**
* Lightweight value normalization for db.query results.
* Only handles type coercion (dates, numbers, NaN) and property filtering.
* Does NOT query the database for relations — those are already resolved
* by Drizzle's relational query API.
*
* Use this instead of `parseDataFromServer` when processing results from
* `db.query.findFirst/findMany` which return pre-hydrated relation data.
*/
export function normalizeDbValues<M extends Record<string, any>>(
data: M,
collection: EntityCollection
): M {
const properties = collection.properties;
Iif (!data || !properties) return data;
const result: Record<string, unknown> = {};
// Get FK columns that are used internally for relations and not defined as properties
const resolvedRelations = resolveCollectionRelations(collection);
const internalFKColumns = new Set<string>();
Object.values(resolvedRelations).forEach(relation => {
Iif (relation.localKey && !properties[relation.localKey]) {
internalFKColumns.add(relation.localKey);
}
});
for (const [key, value] of Object.entries(data)) {
// Skip internal FK columns
Iif (internalFKColumns.has(key)) continue;
const property = properties[key as keyof M] as Property;
Iif (!property) continue; // Skip DB columns not defined in properties
// Skip relation properties — they're already handled by db.query
Iif (property.type === "relation") continue;
result[key] = parsePropertyFromServer(value, property, collection, key);
}
return result as M;
}
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