@decaf-ts/db-decorators
Version:
Agnostic database decorators and repository
77 lines • 11 kB
JavaScript
import { DefaultRepositoryFlags } from "./constants";
import { ObjectAccumulator } from "typed-object-accumulator";
export const DefaultContextFactory = (arg) => {
return new Context().accumulate(Object.assign({}, arg, { timestamp: new Date() }));
};
export class Context {
static { this.factory = DefaultContextFactory; }
constructor(obj) {
this.cache = new ObjectAccumulator();
if (obj)
return this.accumulate(obj);
}
accumulate(value) {
Object.defineProperty(this, "cache", {
value: this.cache.accumulate(value),
writable: false,
enumerable: false,
configurable: true,
});
return this;
}
get timestamp() {
return this.cache.timestamp;
}
get(key) {
try {
return this.cache.get(key);
}
catch (e) {
if (this.cache.parentContext)
return this.cache.parentContext.get(key);
throw e;
}
}
child(operation, model) {
return Context.childFrom(this, {
operation: operation,
affectedTables: model ? [model] : [],
});
}
static childFrom(context, overrides) {
return Context.factory(Object.assign({}, context.cache, overrides || {}));
}
static async from(operation, overrides, model,
// eslint-disable-next-line @typescript-eslint/no-unused-vars
...args) {
return Context.factory(Object.assign({}, DefaultRepositoryFlags, overrides, {
operation: operation,
model: model,
}));
}
static async args(operation, model, args, contextual, overrides) {
const last = args.pop();
async function getContext() {
if (contextual)
return contextual.context(operation, overrides || {}, model, ...args);
return Context.from(operation, overrides || {}, model, ...args);
}
let c;
if (last) {
if (last instanceof Context) {
c = last;
args.push(last);
}
else {
c = (await getContext());
args.push(last, c);
}
}
else {
c = (await getContext());
args.push(c);
}
return { context: c, args: args };
}
}
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[model] : [],\n      } as unknown as Partial<F>\n    );\n  }\n\n  static childFrom<F extends RepositoryFlags, C extends Context<F>>(\n    context: C,\n    overrides?: Partial<F>\n  ): C {\n    return Context.factory(\n      Object.assign({}, context.cache, overrides || {})\n    ) as unknown as C;\n  }\n\n  static async from<\n    M extends Model,\n    F extends RepositoryFlags,\n    C extends Context<F>,\n  >(\n    operation:\n      | OperationKeys.CREATE\n      | OperationKeys.READ\n      | OperationKeys.UPDATE\n      | OperationKeys.DELETE,\n    overrides: Partial<F>,\n    model: Constructor<M>,\n    // eslint-disable-next-line @typescript-eslint/no-unused-vars\n    ...args: any[]\n  ): Promise<C> {\n    return Context.factory(\n      Object.assign({}, DefaultRepositoryFlags, overrides, {\n        operation: operation,\n        model: model,\n      })\n    ) as C;\n  }\n\n  static async args<\n    M extends Model,\n    C extends Context<F>,\n    F extends RepositoryFlags,\n  >(\n    operation:\n      | OperationKeys.CREATE\n      | OperationKeys.READ\n      | OperationKeys.UPDATE\n      | OperationKeys.DELETE,\n    model: Constructor<M>,\n    args: any[],\n    contextual?: Contextual<F>,\n    overrides?: Partial<F>\n  ): Promise<ContextArgs<F, C>> {\n    const last = args.pop();\n\n    async function getContext() {\n      if (contextual)\n        return contextual.context(operation, overrides || {}, model, ...args);\n      return Context.from(operation, overrides || {}, model, ...args);\n    }\n\n    let c: C;\n    if (last) {\n      if (last instanceof Context) {\n        c = last as C;\n        args.push(last);\n      } else {\n        c = (await getContext()) as C;\n        args.push(last, c);\n      }\n    } else {\n      c = (await getContext()) as C;\n      args.push(c);\n    }\n\n    return { context: c, args: args };\n  }\n}\n"]}