refactor: create separate schema for Ajv validation

[ivan-tymoshenko]

How it's working now:
It takes a user-defined schema, adds necessary adjustments for Ajv (now it's only for date type), and then works with modified schema.

How it will work:
It will clone a user-defined schema, modify it and pass it to the Ajv. Serialization will work with the original schema. The only requirement we must follow is that the schema must not change its structure during the modification. In other words, the JSON pointers must match in two schemas, but the schemas themselves (type, format, keywords, ... etc.) may differ.

Motivation:
It's too complicated to maintain one syntax for serialization and validation rules. Our code depends on Ajv validation syntax.

Depends on #507

[github-actions]

Node: 14
PR:

FJS creation x 3,026 ops/sec ±1.52% (88 runs sampled)
CJS creation x 128,979 ops/sec ±0.58% (93 runs sampled)
AJV Serialize creation x 24,197,870 ops/sec ±0.20% (95 runs sampled)
JSON.stringify array x 3,606 ops/sec ±0.12% (97 runs sampled)
fast-json-stringify array default x 5,415 ops/sec ±0.32% (98 runs sampled)
fast-json-stringify array json-stringify x 5,316 ops/sec ±0.24% (98 runs sampled)
compile-json-stringify array x 5,244 ops/sec ±0.70% (91 runs sampled)
AJV Serialize array x 5,402 ops/sec ±0.20% (93 runs sampled)
JSON.stringify large array x 178 ops/sec ±0.32% (82 runs sampled)
fast-json-stringify large array default x 82.42 ops/sec ±0.22% (49 runs sampled)
fast-json-stringify large array json-stringify x 178 ops/sec ±0.11% (83 runs sampled)
compile-json-stringify large array x 236 ops/sec ±0.19% (91 runs sampled)
AJV Serialize large array x 84.48 ops/sec ±0.17% (72 runs sampled)
JSON.stringify long string x 11,254 ops/sec ±0.35% (98 runs sampled)
fast-json-stringify long string x 11,259 ops/sec ±0.09% (98 runs sampled)
compile-json-stringify long string x 11,254 ops/sec ±0.10% (98 runs sampled)
AJV Serialize long string x 14,703 ops/sec ±0.47% (90 runs sampled)
JSON.stringify short string x 8,891,428 ops/sec ±0.14% (95 runs sampled)
fast-json-stringify short string x 24,701,216 ops/sec ±0.09% (99 runs sampled)
compile-json-stringify short string x 24,216,046 ops/sec ±0.40% (96 runs sampled)
AJV Serialize short string x 22,894,010 ops/sec ±0.21% (97 runs sampled)
JSON.stringify obj x 2,170,861 ops/sec ±0.51% (89 runs sampled)
fast-json-stringify obj x 5,533,620 ops/sec ±0.12% (94 runs sampled)
compile-json-stringify obj x 12,122,110 ops/sec ±0.11% (94 runs sampled)
AJV Serialize obj x 6,715,022 ops/sec ±0.64% (94 runs sampled)
JSON stringify date x 717,098 ops/sec ±0.12% (91 runs sampled)
fast-json-stringify date format x 1,536,148 ops/sec ±0.24% (97 runs sampled)
compile-json-stringify date format x 718,086 ops/sec ±0.45% (94 runs sampled)

MAIN:

---

Node: 16
PR:

FJS creation x 2,573 ops/sec ±2.32% (84 runs sampled)
CJS creation x 110,393 ops/sec ±0.30% (92 runs sampled)
AJV Serialize creation x 19,284,303 ops/sec ±0.33% (92 runs sampled)
JSON.stringify array x 2,929 ops/sec ±0.85% (94 runs sampled)
fast-json-stringify array default x 4,313 ops/sec ±0.42% (94 runs sampled)
fast-json-stringify array json-stringify x 4,235 ops/sec ±0.26% (94 runs sampled)
compile-json-stringify array x 4,375 ops/sec ±1.00% (89 runs sampled)
AJV Serialize array x 4,524 ops/sec ±0.28% (92 runs sampled)
JSON.stringify large array x 148 ops/sec ±0.29% (83 runs sampled)
fast-json-stringify large array default x 61.74 ops/sec ±0.89% (63 runs sampled)
fast-json-stringify large array json-stringify x 147 ops/sec ±0.47% (82 runs sampled)
compile-json-stringify large array x 200 ops/sec ±0.40% (84 runs sampled)
AJV Serialize large array x 64.61 ops/sec ±0.81% (66 runs sampled)
JSON.stringify long string x 9,760 ops/sec ±0.25% (94 runs sampled)
fast-json-stringify long string x 9,731 ops/sec ±0.69% (94 runs sampled)
compile-json-stringify long string x 9,741 ops/sec ±0.36% (93 runs sampled)
AJV Serialize long string x 10,633 ops/sec ±0.25% (94 runs sampled)
JSON.stringify short string x 7,155,146 ops/sec ±0.79% (94 runs sampled)
fast-json-stringify short string x 21,694,278 ops/sec ±0.31% (93 runs sampled)
compile-json-stringify short string x 19,624,640 ops/sec ±0.32% (92 runs sampled)
AJV Serialize short string x 18,391,672 ops/sec ±0.34% (94 runs sampled)
JSON.stringify obj x 1,797,196 ops/sec ±0.20% (95 runs sampled)
fast-json-stringify obj x 4,506,962 ops/sec ±0.25% (96 runs sampled)
compile-json-stringify obj x 10,106,748 ops/sec ±0.84% (95 runs sampled)
AJV Serialize obj x 5,531,539 ops/sec ±0.22% (93 runs sampled)
JSON stringify date x 621,792 ops/sec ±0.28% (95 runs sampled)
fast-json-stringify date format x 1,215,679 ops/sec ±0.77% (93 runs sampled)
compile-json-stringify date format x 626,112 ops/sec ±0.32% (94 runs sampled)

MAIN:

---

Node: 18
PR:

FJS creation x 2,631 ops/sec ±1.26% (88 runs sampled)
CJS creation x 128,782 ops/sec ±0.54% (92 runs sampled)
AJV Serialize creation x 21,786,096 ops/sec ±0.53% (92 runs sampled)
JSON.stringify array x 3,568 ops/sec ±0.09% (99 runs sampled)
fast-json-stringify array default x 4,842 ops/sec ±0.15% (98 runs sampled)
fast-json-stringify array json-stringify x 4,766 ops/sec ±0.80% (95 runs sampled)
compile-json-stringify array x 4,926 ops/sec ±0.25% (96 runs sampled)
AJV Serialize array x 5,002 ops/sec ±0.16% (96 runs sampled)
JSON.stringify large array x 173 ops/sec ±0.53% (88 runs sampled)
fast-json-stringify large array default x 78.04 ops/sec ±0.51% (43 runs sampled)
fast-json-stringify large array json-stringify x 173 ops/sec ±0.13% (88 runs sampled)
compile-json-stringify large array x 227 ops/sec ±0.12% (82 runs sampled)
AJV Serialize large array x 80.98 ops/sec ±0.53% (69 runs sampled)
JSON.stringify long string x 11,291 ops/sec ±0.08% (98 runs sampled)
fast-json-stringify long string x 11,280 ops/sec ±0.11% (96 runs sampled)
compile-json-stringify long string x 11,262 ops/sec ±0.08% (96 runs sampled)
AJV Serialize long string x 14,849 ops/sec ±0.09% (95 runs sampled)
JSON.stringify short string x 8,829,040 ops/sec ±0.09% (93 runs sampled)
fast-json-stringify short string x 25,291,792 ops/sec ±0.15% (96 runs sampled)
compile-json-stringify short string x 21,687,192 ops/sec ±0.24% (94 runs sampled)
AJV Serialize short string x 20,091,776 ops/sec ±1.93% (89 runs sampled)
JSON.stringify obj x 2,138,563 ops/sec ±0.46% (97 runs sampled)
fast-json-stringify obj x 5,177,527 ops/sec ±0.08% (96 runs sampled)
compile-json-stringify obj x 11,200,558 ops/sec ±0.15% (96 runs sampled)
AJV Serialize obj x 6,654,567 ops/sec ±0.54% (95 runs sampled)
JSON stringify date x 736,735 ops/sec ±0.10% (99 runs sampled)
fast-json-stringify date format x 1,605,446 ops/sec ±0.09% (94 runs sampled)
compile-json-stringify date format x 730,329 ops/sec ±0.48% (97 runs sampled)

MAIN:

[Uzlopak]

It makes sense to me.

[mcollina]

lgtm

[ivan-tymoshenko]

There are two updates.

1. I moved all Ajv logic to the Validator class. The Validator is a class Adapter. It has two public methods addSchema and validate. It should validate schema according to our rules. It encapsulates all Ajv validation logic in one place.
2. There is a small change in API. If you call the build method in the debug mode, one of the return parameters would be the Validator instance instead of the Ajv instance.

[climba03003]

The code itself look good to me and the changes on debug output is breaking.

@ivan-tymoshenko
You are the one focusing on this package. Can I ask how many breaking changes are you expected in the near future? I am considering should we group a bunch of them before another major.

[climba03003]

Is this changes itself self contained?
Do we need a test case for it?

[ivan-tymoshenko]

I didn't add this check. I just moved it inside the class.

fast-json-stringify/index.js

Line 113 in b0bb1a6

if (refResolver.getSchema(schemaKey) === undefined) {

[ivan-tymoshenko]

@climba03003 I can leave the Ajv instance and remove it in the next major release.