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[lib] Move conversion function out of validation utils
Summary: Changes required for fixing [ENG-4670](https://linear.app/comm/issue/ENG-4670/) introduce some cyclic dependencies so we need to move some things around. Test Plan: `yarn test-all`, `yarn eslint`, `yarn flow-all` Reviewers: tomek, inka, kamil, ginsu Reviewed By: kamil Subscribers: ashoat Differential Revision: https://phab.comm.dev/D8879
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,127 @@ | ||
// @flow | ||
|
||
import _mapKeys from 'lodash/fp/mapKeys.js'; | ||
import _mapValues from 'lodash/fp/mapValues.js'; | ||
import type { TInterface, TType } from 'tcomb'; | ||
|
||
import { assertWithValidator, tID } from './validation-utils.js'; | ||
|
||
function convertServerIDsToClientIDs<T>( | ||
serverPrefixID: string, | ||
outputValidator: TType<T>, | ||
data: T, | ||
): T { | ||
const conversionFunction = id => { | ||
if (id.indexOf('|') !== -1) { | ||
console.warn(`Server id '${id}' already has a prefix`); | ||
return id; | ||
} | ||
return `${serverPrefixID}|${id}`; | ||
}; | ||
|
||
return convertObject(outputValidator, data, [tID], conversionFunction); | ||
} | ||
|
||
function convertClientIDsToServerIDs<T>( | ||
serverPrefixID: string, | ||
outputValidator: TType<T>, | ||
data: T, | ||
): T { | ||
const prefix = serverPrefixID + '|'; | ||
const conversionFunction = id => { | ||
if (id.startsWith(prefix)) { | ||
return id.substr(prefix.length); | ||
} | ||
|
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throw new Error('invalid_client_id_prefix'); | ||
}; | ||
|
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return convertObject(outputValidator, data, [tID], conversionFunction); | ||
} | ||
|
||
function convertObject<T, I>( | ||
validator: TType<I>, | ||
input: I, | ||
typesToConvert: $ReadOnlyArray<TType<T>>, | ||
conversionFunction: T => T, | ||
): I { | ||
if (input === null || input === undefined) { | ||
return input; | ||
} | ||
|
||
// While they should be the same runtime object, | ||
// `TValidator` is `TType<T>` and `validator` is `TType<I>`. | ||
// Having them have different types allows us to use `assertWithValidator` | ||
// to change `input` flow type | ||
const TValidator = typesToConvert[typesToConvert.indexOf(validator)]; | ||
if (TValidator && TValidator.is(input)) { | ||
const TInput = assertWithValidator(input, TValidator); | ||
const converted = conversionFunction(TInput); | ||
return assertWithValidator(converted, validator); | ||
} | ||
|
||
if (validator.meta.kind === 'maybe' || validator.meta.kind === 'subtype') { | ||
return convertObject( | ||
validator.meta.type, | ||
input, | ||
typesToConvert, | ||
conversionFunction, | ||
); | ||
} | ||
if (validator.meta.kind === 'interface' && typeof input === 'object') { | ||
const recastValidator: TInterface<typeof input> = (validator: any); | ||
const result = {}; | ||
for (const key in input) { | ||
const innerValidator = recastValidator.meta.props[key]; | ||
result[key] = convertObject( | ||
innerValidator, | ||
input[key], | ||
typesToConvert, | ||
conversionFunction, | ||
); | ||
} | ||
return assertWithValidator(result, recastValidator); | ||
} | ||
if (validator.meta.kind === 'union') { | ||
for (const innerValidator of validator.meta.types) { | ||
if (innerValidator.is(input)) { | ||
return convertObject( | ||
innerValidator, | ||
input, | ||
typesToConvert, | ||
conversionFunction, | ||
); | ||
} | ||
} | ||
return input; | ||
} | ||
if (validator.meta.kind === 'list' && Array.isArray(input)) { | ||
const innerValidator = validator.meta.type; | ||
return (input.map(value => | ||
convertObject(innerValidator, value, typesToConvert, conversionFunction), | ||
): any); | ||
} | ||
if (validator.meta.kind === 'dict' && typeof input === 'object') { | ||
const domainValidator = validator.meta.domain; | ||
const codomainValidator = validator.meta.codomain; | ||
if (typesToConvert.includes(domainValidator)) { | ||
input = _mapKeys(key => conversionFunction(key))(input); | ||
} | ||
return _mapValues(value => | ||
convertObject( | ||
codomainValidator, | ||
value, | ||
typesToConvert, | ||
conversionFunction, | ||
), | ||
)(input); | ||
} | ||
|
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return input; | ||
} | ||
|
||
export { | ||
convertClientIDsToServerIDs, | ||
convertServerIDsToClientIDs, | ||
convertObject, | ||
}; |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,69 @@ | ||
// @flow | ||
|
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import invariant from 'invariant'; | ||
import t from 'tcomb'; | ||
|
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import { | ||
convertServerIDsToClientIDs, | ||
convertClientIDsToServerIDs, | ||
} from './conversion-utils.js'; | ||
import { tShape, tID, idSchemaRegex } from './validation-utils.js'; | ||
|
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describe('id conversion', () => { | ||
it('should convert string id', () => { | ||
const validator = tShape({ id: tID }); | ||
const serverData = { id: '1' }; | ||
const clientData = { id: '0|1' }; | ||
|
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expect( | ||
convertServerIDsToClientIDs('0', validator, serverData), | ||
).toStrictEqual(clientData); | ||
expect( | ||
convertClientIDsToServerIDs('0', validator, clientData), | ||
).toStrictEqual(serverData); | ||
}); | ||
|
||
it('should convert a complex type', () => { | ||
const validator = tShape({ ids: t.dict(tID, t.list(tID)) }); | ||
const serverData = { ids: { '1': ['11', '12'], '2': [], '3': ['13'] } }; | ||
const clientData = { | ||
ids: { '0|1': ['0|11', '0|12'], '0|2': [], '0|3': ['0|13'] }, | ||
}; | ||
|
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expect( | ||
convertServerIDsToClientIDs('0', validator, serverData), | ||
).toStrictEqual(clientData); | ||
expect( | ||
convertClientIDsToServerIDs('0', validator, clientData), | ||
).toStrictEqual(serverData); | ||
}); | ||
|
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it('should convert a refinement', () => { | ||
const validator = t.refinement(tID, () => true); | ||
const serverData = '1'; | ||
const clientData = '0|1'; | ||
|
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expect( | ||
convertServerIDsToClientIDs('0', validator, serverData), | ||
).toStrictEqual(clientData); | ||
expect( | ||
convertClientIDsToServerIDs('0', validator, clientData), | ||
).toStrictEqual(serverData); | ||
}); | ||
}); | ||
|
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describe('idSchemaRegex tests', () => { | ||
it('should capture ids', () => { | ||
const regex = new RegExp(`^(${idSchemaRegex})$`); | ||
const ids = ['123|123', '0|0', '123', '0']; | ||
|
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for (const id of ids) { | ||
const result = regex.exec(id); | ||
expect(result).not.toBeNull(); | ||
invariant(result, 'result is not null'); | ||
const matches = [...result]; | ||
expect(matches).toHaveLength(2); | ||
expect(matches[1]).toBe(id); | ||
} | ||
}); | ||
}); |
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