/
index.ts
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/
index.ts
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import {
format,
complementError,
asyncMap,
warning,
deepMerge,
convertFieldsError,
} from './util';
import validators from './validator/index';
import { messages as defaultMessages, newMessages } from './messages';
import {
InternalRuleItem,
InternalValidateMessages,
Rule,
RuleItem,
Rules,
ValidateCallback,
ValidateMessages,
ValidateOption,
Values,
RuleValuePackage,
ValidateError,
ValidateFieldsError,
SyncErrorType,
ValidateResult,
} from './interface';
export * from './interface';
/**
* Encapsulates a validation schema.
*
* @param descriptor An object declaring validation rules
* for this schema.
*/
class Schema {
// ========================= Static =========================
static register = function register(type: string, validator) {
if (typeof validator !== 'function') {
throw new Error(
'Cannot register a validator by type, validator is not a function',
);
}
validators[type] = validator;
};
static warning = warning;
static messages = defaultMessages;
static validators = validators;
// ======================== Instance ========================
rules: Record<string, RuleItem[]> = null;
_messages: InternalValidateMessages = defaultMessages;
constructor(descriptor: Rules) {
this.define(descriptor);
}
define(rules: Rules) {
if (!rules) {
throw new Error('Cannot configure a schema with no rules');
}
if (typeof rules !== 'object' || Array.isArray(rules)) {
throw new Error('Rules must be an object');
}
this.rules = {};
Object.keys(rules).forEach(name => {
const item: Rule = rules[name];
this.rules[name] = Array.isArray(item) ? item : [item];
});
}
messages(messages?: ValidateMessages) {
if (messages) {
this._messages = deepMerge(newMessages(), messages);
}
return this._messages;
}
validate(
source: Values,
option?: ValidateOption,
callback?: ValidateCallback,
): Promise<Values>;
validate(source: Values, callback: ValidateCallback): Promise<Values>;
validate(source: Values): Promise<Values>;
validate(source_: Values, o: any = {}, oc: any = () => {}): Promise<Values> {
let source: Values = source_;
let options: ValidateOption = o;
let callback: ValidateCallback = oc;
if (typeof options === 'function') {
callback = options;
options = {};
}
if (!this.rules || Object.keys(this.rules).length === 0) {
if (callback) {
callback(null, source);
}
return Promise.resolve(source);
}
function complete(results: (ValidateError | ValidateError[])[]) {
let errors: ValidateError[] = [];
let fields: ValidateFieldsError = {};
function add(e: ValidateError | ValidateError[]) {
if (Array.isArray(e)) {
errors = errors.concat(...e);
} else {
errors.push(e);
}
}
for (let i = 0; i < results.length; i++) {
add(results[i]);
}
if (!errors.length) {
callback(null, source);
} else {
fields = convertFieldsError(errors);
(callback as (
errors: ValidateError[],
fields: ValidateFieldsError,
) => void)(errors, fields);
}
}
if (options.messages) {
let messages = this.messages();
if (messages === defaultMessages) {
messages = newMessages();
}
deepMerge(messages, options.messages);
options.messages = messages;
} else {
options.messages = this.messages();
}
const series: Record<string, RuleValuePackage[]> = {};
const keys = options.keys || Object.keys(this.rules);
keys.forEach(z => {
const arr = this.rules[z];
let value = source[z];
arr.forEach(r => {
let rule: InternalRuleItem = r;
if (typeof rule.transform === 'function') {
if (source === source_) {
source = { ...source };
}
value = source[z] = rule.transform(value);
}
if (typeof rule === 'function') {
rule = {
validator: rule,
};
} else {
rule = { ...rule };
}
// Fill validator. Skip if nothing need to validate
rule.validator = this.getValidationMethod(rule);
if (!rule.validator) {
return;
}
rule.field = z;
rule.fullField = rule.fullField || z;
rule.type = this.getType(rule);
series[z] = series[z] || [];
series[z].push({
rule,
value,
source,
field: z,
});
});
});
const errorFields = {};
return asyncMap(
series,
options,
(data, doIt) => {
const rule = data.rule;
let deep =
(rule.type === 'object' || rule.type === 'array') &&
(typeof rule.fields === 'object' ||
typeof rule.defaultField === 'object');
deep = deep && (rule.required || (!rule.required && data.value));
rule.field = data.field;
function addFullField(key: string, schema: RuleItem) {
return {
...schema,
fullField: `${rule.fullField}.${key}`,
fullFields: rule.fullFields ? [...rule.fullFields, key] : [key],
};
}
function cb(e: SyncErrorType | SyncErrorType[] = []) {
let errorList = Array.isArray(e) ? e : [e];
if (!options.suppressWarning && errorList.length) {
Schema.warning('async-validator:', errorList);
}
if (errorList.length && rule.message !== undefined) {
errorList = [].concat(rule.message);
}
// Fill error info
let filledErrors = errorList.map(complementError(rule, source));
if (options.first && filledErrors.length) {
errorFields[rule.field] = 1;
return doIt(filledErrors);
}
if (!deep) {
doIt(filledErrors);
} else {
// if rule is required but the target object
// does not exist fail at the rule level and don't
// go deeper
if (rule.required && !data.value) {
if (rule.message !== undefined) {
filledErrors = []
.concat(rule.message)
.map(complementError(rule, source));
} else if (options.error) {
filledErrors = [
options.error(
rule,
format(options.messages.required, rule.field),
),
];
}
return doIt(filledErrors);
}
let fieldsSchema: Record<string, Rule> = {};
if (rule.defaultField) {
Object.keys(data.value).map(key => {
fieldsSchema[key] = rule.defaultField;
});
}
fieldsSchema = {
...fieldsSchema,
...data.rule.fields,
};
const paredFieldsSchema: Record<string, RuleItem[]> = {};
Object.keys(fieldsSchema).forEach(field => {
const fieldSchema = fieldsSchema[field];
const fieldSchemaList = Array.isArray(fieldSchema)
? fieldSchema
: [fieldSchema];
paredFieldsSchema[field] = fieldSchemaList.map(
addFullField.bind(null, field),
);
});
const schema = new Schema(paredFieldsSchema);
schema.messages(options.messages);
if (data.rule.options) {
data.rule.options.messages = options.messages;
data.rule.options.error = options.error;
}
schema.validate(data.value, data.rule.options || options, errs => {
const finalErrors = [];
if (filledErrors && filledErrors.length) {
finalErrors.push(...filledErrors);
}
if (errs && errs.length) {
finalErrors.push(...errs);
}
doIt(finalErrors.length ? finalErrors : null);
});
}
}
let res: ValidateResult;
if (rule.asyncValidator) {
res = rule.asyncValidator(rule, data.value, cb, data.source, options);
} else if (rule.validator) {
try {
res = rule.validator(rule, data.value, cb, data.source, options);
} catch (error) {
console.error?.(error);
// rethrow to report error
if (!options.suppressValidatorError) {
setTimeout(() => {
throw error;
}, 0);
}
cb(error.message);
}
if (res === true) {
cb();
} else if (res === false) {
cb(
typeof rule.message === 'function'
? rule.message(rule.fullField || rule.field)
: rule.message || `${rule.fullField || rule.field} fails`,
);
} else if (res instanceof Array) {
cb(res);
} else if (res instanceof Error) {
cb(res.message);
}
}
if (res && (res as Promise<void>).then) {
(res as Promise<void>).then(
() => cb(),
e => cb(e),
);
}
},
results => {
complete(results);
},
source,
);
}
getType(rule: InternalRuleItem) {
if (rule.type === undefined && rule.pattern instanceof RegExp) {
rule.type = 'pattern';
}
if (
typeof rule.validator !== 'function' &&
rule.type &&
!validators.hasOwnProperty(rule.type)
) {
throw new Error(format('Unknown rule type %s', rule.type));
}
return rule.type || 'string';
}
getValidationMethod(rule: InternalRuleItem) {
if (typeof rule.validator === 'function') {
return rule.validator;
}
const keys = Object.keys(rule);
const messageIndex = keys.indexOf('message');
if (messageIndex !== -1) {
keys.splice(messageIndex, 1);
}
if (keys.length === 1 && keys[0] === 'required') {
return validators.required;
}
return validators[this.getType(rule)] || undefined;
}
}
export default Schema;