82 lines
2.2 KiB
JavaScript
82 lines
2.2 KiB
JavaScript
import { Data_Validation_Failed, Data_Coercion_Failed, Superfluous_Data_Field } from '@efforting.tech/errors';
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export class Field_Configuration {
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constructor(validation_function=null, coercion_function=null, factory_function=null, expected_description=undefined) {
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Object.assign(this, { validation_function, coercion_function, factory_function, expected_description });
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}
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check_validation(value) {
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const { validation_function } = this;
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return !validation_function || validation_function(value);
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}
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validate(value, target=undefined) {
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const { validation_function, expected_description } = this;
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if (!this.check_validation(value)) {
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throw new Data_Validation_Failed({
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validation_function, value,
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target, expected_description,
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});
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}
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}
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coerce(value, target=undefined) {
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const { coercion_function, expected_description } = this;
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try {
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return coercion_function ? coercion_function(value) : value;
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} catch (e) {
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throw new Data_Coercion_Failed({
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coercion_function, value,
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target, expected_description,
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upstream_error: e,
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})
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}
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}
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load(value=undefined, target=undefined) {
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const { factory_function } = this;
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if ((value === undefined) && factory_function) {
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value = factory_function(target);
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}
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const coerced_value = this.coerce(value, target);
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this.validate(coerced_value, target);
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return coerced_value;
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}
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}
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export class Schema {
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constructor(field_schema, name=undefined) {
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Object.assign(this, { field_schema, name });
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}
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load(value={}, target=undefined) {
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const { field_schema, name } = this;
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for (const [value_name, value_value] of Object.entries(value)) {
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if (!field_schema[value_name]) {
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throw new Superfluous_Data_Field({
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field_value: value_value, field_name: value_name, target,
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});
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}
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}
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const result = {};
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const this_schema = name ? `schema "${name}"` : 'untitled schema';
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for (const [field_name, field_config] of Object.entries(field_schema)) {
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const sub_target = { schema: this, name: field_name, config: field_config, parent_target: target, info: `Field "${field_name}" of ${this_schema}` };
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result[field_name] = field_config.load(value[field_name], sub_target);
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}
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return result;
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}
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} |