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Constructor,
Model,
ModelConstructor,
Validation,
ValidationKeys,
} from "@decaf-ts/decorator-validation";
import { Repo, Repository } from "../repository/Repository";
import { RelationsMetadata } from "./types";
import {
findPrimaryKey,
InternalError,
NotFoundError,
RepositoryFlags,
} from "@decaf-ts/db-decorators";
import { PersistenceKeys } from "../persistence/constants";
import { Cascade } from "../repository/constants";
import { Context } from "@decaf-ts/db-decorators";
export async function createOrUpdate<
M extends Model,
F extends RepositoryFlags,
>(
model: M,
context: Context<F>,
repository?: Repo<M, F, Context<F>>
): Promise<M> {
if (!repository) {
const constructor = Model.get(model.constructor.name);
Iif (!constructor)
throw new InternalError(`Could not find model ${model.constructor.name}`);
repository = Repository.forModel<M, Repo<M>>(
constructor as unknown as ModelConstructor<M>
);
}
if (typeof model[repository.pk] === "undefined")
return repository.create(model, context);
else {
try {
return repository.update(model, context);
} catch (e: any) {
Iif (!(e instanceof NotFoundError)) throw e;
return repository.create(model, context);
}
}
}
export async function oneToOneOnCreate<
M extends Model,
R extends Repo<M, F, C>,
V extends RelationsMetadata,
F extends RepositoryFlags,
C extends Context<F>,
>(
this: R,
context: Context<F>,
data: V,
key: keyof M,
model: M
): Promise<void> {
const propertyValue: any = model[key];
Iif (!propertyValue) return;
if (typeof propertyValue !== "object") {
const innerRepo = repositoryFromTypeMetadata(model, key);
const read = await innerRepo.read(propertyValue);
await cacheModelForPopulate(context, model, key, propertyValue, read);
(model as any)[key] = propertyValue;
return;
}
const constructor = Model.get(data.class);
Iif (!constructor)
throw new InternalError(`Could not find model ${data.class}`);
const repo: Repo<any> = Repository.forModel(constructor);
const created = await repo.create(propertyValue);
const pk = findPrimaryKey(created).id;
await cacheModelForPopulate(context, model, key, created[pk], created);
(model as any)[key] = created[pk];
}
export async function oneToOneOnUpdate<
M extends Model,
R extends Repo<M, F, C>,
V extends RelationsMetadata,
F extends RepositoryFlags,
C extends Context<F>,
>(
this: R,
context: Context<F>,
data: V,
key: keyof M,
model: M
): Promise<void> {
const propertyValue: any = model[key];
Iif (!propertyValue) return;
Iif (data.cascade.update !== Cascade.CASCADE) return;
Iif (typeof propertyValue !== "object") {
const innerRepo = repositoryFromTypeMetadata(model, key);
const read = await innerRepo.read(propertyValue);
await cacheModelForPopulate(context, model, key, propertyValue, read);
(model as any)[key] = propertyValue;
return;
}
const updated = await createOrUpdate(model[key] as M, context);
const pk = findPrimaryKey(updated).id;
await cacheModelForPopulate(
context,
model,
key,
updated[pk] as string,
updated
);
model[key] = updated[pk];
}
export async function oneToOneOnDelete<
M extends Model,
R extends Repo<M, F, C>,
V extends RelationsMetadata,
F extends RepositoryFlags,
C extends Context<F>,
>(
this: R,
context: Context<F>,
data: V,
key: keyof M,
model: M
): Promise<void> {
const propertyValue: any = model[key];
Iif (!propertyValue) return;
Iif (data.cascade.update !== Cascade.CASCADE) return;
const innerRepo: Repo<M> = repositoryFromTypeMetadata(model, key);
let deleted: M;
if (!(propertyValue instanceof Model))
deleted = await innerRepo.delete(model[key] as string, context);
else
deleted = await innerRepo.delete(
(model[key] as M)[innerRepo.pk as keyof M] as string,
context
);
await cacheModelForPopulate(
context,
model,
key,
deleted[innerRepo.pk] as string,
deleted
);
}
export async function oneToManyOnCreate<
M extends Model,
R extends Repo<M, F, C>,
V extends RelationsMetadata,
F extends RepositoryFlags,
C extends Context<F>,
>(
this: R,
context: Context<F>,
data: V,
key: keyof M,
model: M
): Promise<void> {
const propertyValues: any = model[key];
Iif (!propertyValues || !propertyValues.length) return;
const arrayType = typeof propertyValues[0];
if (!propertyValues.every((item: any) => typeof item === arrayType))
throw new InternalError(
`Invalid operation. All elements of property ${key as string} must match the same type.`
);
const uniqueValues = new Set([...propertyValues]);
if (arrayType !== "object") {
const repo = repositoryFromTypeMetadata(model, key);
for (const id of uniqueValues) {
const read = await repo.read(id);
await cacheModelForPopulate(context, model, key, id, read);
}
(model as any)[key] = [...uniqueValues];
return;
}
const pkName = findPrimaryKey(propertyValues[0]).id;
const result: Set<string> = new Set();
for (const m of propertyValues) {
const record = await createOrUpdate(m, context);
await cacheModelForPopulate(context, model, key, record[pkName], record);
result.add(record[pkName]);
}
(model as any)[key] = [...result];
}
export async function oneToManyOnUpdate<
M extends Model,
R extends Repo<M, F, C>,
V extends RelationsMetadata,
F extends RepositoryFlags,
C extends Context<F>,
>(
this: R,
context: Context<F>,
data: V,
key: keyof M,
model: M
): Promise<void> {
const { cascade } = data;
Iif (cascade.update !== Cascade.CASCADE) return;
return oneToManyOnCreate.apply(this as any, [
context,
data,
key as keyof Model,
model,
]);
}
export async function oneToManyOnDelete<
M extends Model,
R extends Repo<M, F, C>,
V extends RelationsMetadata,
F extends RepositoryFlags,
C extends Context<F>,
>(
this: R,
context: Context<F>,
data: V,
key: keyof M,
model: M
): Promise<void> {
Iif (data.cascade.delete !== Cascade.CASCADE) return;
const values = model[key] as any;
Iif (!values || !values.length) return;
const arrayType = typeof values[0];
const areAllSameType = values.every((item: any) => typeof item === arrayType);
Iif (!areAllSameType)
throw new InternalError(
`Invalid operation. All elements of property ${key as string} must match the same type.`
);
const isInstantiated = arrayType === "object";
const repo = isInstantiated
? Repository.forModel(values[0])
: repositoryFromTypeMetadata(model, key);
const uniqueValues = new Set([
...(isInstantiated
? values.map((v: Record<string, any>) => v[repo.pk as string])
: values),
]);
for (const id of uniqueValues.values()) {
const deleted = await repo.delete(id, context);
await cacheModelForPopulate(context, model, key, id, deleted);
}
(model as any)[key] = [...uniqueValues];
}
export function getPopulateKey(
tableName: string,
fieldName: string,
id: string | number
) {
return [PersistenceKeys.POPULATE, tableName, fieldName, id].join(".");
}
export async function cacheModelForPopulate<
M extends Model,
F extends RepositoryFlags,
>(
context: Context<F>,
parentModel: M,
propertyKey: keyof M | string,
pkValue: string | number,
cacheValue: any
) {
const cacheKey = getPopulateKey(
parentModel.constructor.name,
propertyKey as string,
pkValue
);
return context.accumulate({ [cacheKey]: cacheValue });
}
export async function populate<
M extends Model,
R extends Repo<M, F, C>,
V extends RelationsMetadata,
F extends RepositoryFlags,
C extends Context<F>,
>(
this: R,
context: Context<F>,
data: V,
key: keyof M,
model: M
): Promise<void> {
if (!data.populate) return;
const nested: any = model[key];
const isArr = Array.isArray(nested);
Iif (typeof nested === "undefined" || (isArr && nested.length === 0)) return;
async function fetchPopulateValues(
c: Context<F>,
model: M,
propName: string,
propKeyValues: any[]
) {
let cacheKey: string;
let val: any;
const results: M[] = [];
for (const proKeyValue of propKeyValues) {
cacheKey = getPopulateKey(model.constructor.name, propName, proKeyValue);
try {
val = await c.get(cacheKey as any);
// eslint-disable-next-line @typescript-eslint/no-unused-vars
} catch (e: any) {
const repo = repositoryFromTypeMetadata(model, propName);
Iif (!repo) throw new InternalError("Could not find repo");
val = await repo.read(proKeyValue);
}
results.push(val);
}
return results;
}
const res = await fetchPopulateValues(
context,
model,
key as string,
isArr ? nested : [nested]
);
(model as any)[key] = isArr ? res : res[0];
}
const commomTypes = [
"array",
"string",
"number",
"boolean",
"symbol",
"function",
"object",
"undefined",
"null",
"bigint",
];
export function repositoryFromTypeMetadata<M extends Model>(
model: any,
propertyKey: string | keyof M
): Repo<M> {
const types = Reflect.getMetadata(
Validation.key(
Array.isArray(model[propertyKey])
? ValidationKeys.LIST
: ValidationKeys.TYPE
),
model,
propertyKey as string
);
const customTypes: any = Array.isArray(model[propertyKey])
? types.clazz
: types.customTypes;
Iif (!types || !customTypes)
throw new InternalError(
`Failed to find types decorators for property ${propertyKey as string}`
);
const allowedTypes: string[] = Array.isArray(customTypes)
? [...customTypes]
: [customTypes];
const constructorName = allowedTypes.find(
(t) => !commomTypes.includes(`${t}`.toLowerCase())
);
Iif (!constructorName)
throw new InternalError(
`Property key ${propertyKey as string} does not have a valid constructor type`
);
const constructor: Constructor<M> | undefined = Model.get(constructorName);
Iif (!constructor)
throw new InternalError(`No registered model found for ${constructorName}`);
return Repository.forModel(constructor);
}
|