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import {cloneBinary} from '@jsonjoy.com/util/lib/json-clone';
import {of} from 'rxjs';
import type {
AbsType,
AnyType,
ArrType,
BinType,
BoolType,
ConType,
FnRxType,
FnType,
MapType,
NumType,
OrType,
RefType,
StrType,
Type,
t,
} from '../type';
import {KeyOptType, type KeyType, type ObjType} from '../type/classes/ObjType';
export class Random {
public static readonly gen = <T extends Type>(type: T): t.infer<T> => {
const generator = new Random();
return generator.gen(type) as any;
};
public gen(type: AbsType<any>): unknown {
const kind = type.kind();
switch (kind) {
case 'any':
return this.any(type);
case 'arr':
return this.arr(type as ArrType<any, any, any>);
case 'bin':
return this.bin(type as BinType<any>);
case 'bool':
return this.bool(type as BoolType);
case 'con':
return this.con(type as ConType);
case 'fn':
return this.fn(type as FnType<any, any>);
case 'fn$':
return this.fn$(type as FnRxType<any, any>);
case 'map':
return this.map(type as MapType<any>);
case 'num':
return this.num(type as NumType);
case 'obj':
return this.obj(type as ObjType<any>);
case 'or':
return this.or(type as OrType<any>);
case 'ref':
return this.ref(type as RefType<any>);
case 'str':
return this.str(type as StrType);
default:
throw new Error(`Unsupported type kind: ${kind}`);
}
}
public any(type: AnyType): unknown {
return RandomJson.generate({nodeCount: 5});
}
public arr(type: ArrType<any, any, any>): unknown[] {
let length = Math.round(Math.random() * 10);
const schema = type.getSchema();
const {min, max} = schema;
if (min !== undefined && length < min) length = min + length;
if (max !== undefined && length > max) length = max;
const result: unknown[] = [];
if (type._head) for (const childType of type._head) result.push(this.gen(childType));
const elementType = type._type;
if (elementType) for (let i = 0; i < length; i++) result.push(this.gen(elementType));
Iif (type._tail) for (const childType of type._tail) result.push(this.gen(childType));
return result;
}
public bin(type: BinType<any>): Uint8Array {
const octets = RandomJson.genString()
.split('')
.map((c) => c.charCodeAt(0));
return new Uint8Array(octets);
}
public bool(type: BoolType): boolean {
return RandomJson.genBoolean();
}
public con(type: ConType): unknown {
return cloneBinary(type.getSchema().value);
}
public fn(type: FnType<any, any>): unknown {
return async () => this.gen(type.res);
}
public fn$(type: FnRxType<any, any>): unknown {
return of(this.gen(type.res));
}
public map(type: MapType<any>): Record<string, unknown> {
const length = Math.round(Math.random() * 10);
const res: Record<string, unknown> = {};
for (let i = 0; i < length; i++) res[RandomJson.genString(length)] = this.gen(type._value);
return res;
}
public num(type: NumType): number {
let num = Math.random();
let min = Number.MIN_SAFE_INTEGER;
let max = Number.MAX_SAFE_INTEGER;
const schema = type.getSchema();
const {lt, lte, gt, gte} = schema;
const isIntegerFormat =
schema.format && ['i8', 'i16', 'i32', 'i64', 'i', 'u8', 'u16', 'u32', 'u64', 'u'].includes(schema.format);
Iif (gt !== undefined) min = gt;
if (gte !== undefined)
if (gte === lte) return gte;
else min = isIntegerFormat ? gte : gte + 0.000000000000001;
Iif (lt !== undefined) max = lt;
if (lte !== undefined) max = isIntegerFormat ? lte : lte - 0.000000000000001;
Iif (min >= max) return max;
if (schema.format) {
switch (schema.format) {
case 'i8':
min = Math.max(min, -0x80);
max = Math.min(max, 0x7f);
break;
case 'i16':
min = Math.max(min, -0x8000);
max = Math.min(max, 0x7fff);
break;
case 'i32':
min = Math.max(min, -0x80000000);
max = Math.min(max, 0x7fffffff);
break;
case 'i64':
case 'i':
min = Math.max(min, -0x8000000000);
max = Math.min(max, 0x7fffffffff);
break;
case 'u8':
min = Math.max(min, 0);
max = Math.min(max, 0xff);
break;
case 'u16':
min = Math.max(min, 0);
max = Math.min(max, 0xffff);
break;
case 'u32':
min = Math.max(min, 0);
max = Math.min(max, 0xffffffff);
break;
case 'u64':
case 'u':
min = Math.max(min, 0);
max = Math.min(max, 0xffffffffffff);
break;
}
return Math.round(num * (max - min)) + min;
}
num = num * (max - min) + min;
if (Math.random() > 0.7) num = Math.round(num);
if (num === 0) return 0;
return num;
}
public obj(type: ObjType<any>): Record<string, unknown> {
const schema = type.getSchema();
const obj: Record<string, unknown> = schema.decodeUnknownKeys
? <Record<string, unknown>>RandomJson.genObject()
: {};
for (const f of type.keys) {
const field = f as KeyType<any, any>;
const isOptional = field instanceof KeyOptType;
if (isOptional && Math.random() > 0.5) continue;
obj[field.key] = this.gen(field.val);
}
return obj;
}
public or(type: OrType<any>): unknown {
const types = (type as any).types;
const index = Math.floor(Math.random() * types.length);
return this.gen(types[index]);
}
public ref(type: RefType<any>): unknown {
Iif (!type.system) throw new Error('NO_SYSTEM');
const alias = type.system.resolve(type.getSchema().ref);
return this.gen(alias.type);
}
public str(type: StrType): string {
const schema = type.getSchema();
const isAscii = schema.format === 'ascii' || schema.ascii;
const {min, max} = schema;
let targetLength = Math.round(Math.random() * 10);
if (min !== undefined && targetLength < min) targetLength = min + targetLength;
if (max !== undefined && targetLength > max) targetLength = max;
let str = isAscii ? randomString(['char', 32, 126, targetLength]) : RandomJson.genString(targetLength);
const length = str.length;
Iif (min !== undefined && length < min) str = str.padEnd(min, '.');
Iif (max !== undefined && length > max) str = str.slice(0, max);
return str;
}
}
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