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validator.ts
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validator.ts
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import type { Data, Schema } from "./types.ts";
import { createError } from "./utils.ts";
export function validateObject(target: Data | number, schema: Schema) {
try {
const { required, properties, type, items } = schema;
if (typeof target !== "number" && required && required.length > 0) {
const empty = required.filter((field) => !target[field]);
if (empty.length > 0) {
const message = empty.length === 1
? `${empty.toString()} is required`
: `[${empty.toString()}] are required`;
throw new Error(`${message}`);
}
}
if (type === "integer" && !Number.isInteger(target)) {
throw new Error(`${target} type is not ${type}`);
}
const single = ["boolean", "string", "number", "null"];
if (single.includes(type) && (typeof target !== type)) {
throw new Error(`${target} type is not ${type}`);
}
if (type === "array" && !items) {
throw new Error(`array items property is missing`);
}
if (
typeof target !== "number" && type === "array" && Array.isArray(items)
) {
items.forEach((val, index) => {
let arrayItemSchema: Schema = {
type: val.type,
};
if (val.properties) {
arrayItemSchema = {
type: val.type,
properties: val.properties,
};
}
validateObject(target[index], arrayItemSchema);
});
}
if (type === "object" && !properties) {
throw new Error(`schema property is missing`);
}
for (const key in properties) {
if (typeof target !== "number" && !target[key]) {
throw new Error(`${key} empty`);
}
if (
properties[key].type === "object" && typeof target !== "number" &&
(typeof target[key] === "object")
) {
const objProperty = properties[key].properties;
const requiredProperty = properties[key].required;
const schemaProperties: Data = {};
for (const objKey in objProperty) {
schemaProperties[objKey] = objProperty[objKey];
}
let schema: Schema = { type: "object", properties: schemaProperties };
if (requiredProperty) {
schema = { type: "object", required: requiredProperty };
}
validateObject(target[key], schema);
}
if (
properties[key].type === "array" && typeof target !== "number" &&
!Array.isArray(target[key])
) {
throw new Error(`${key} type is ${properties[key].type}`);
}
if (
properties[key].type === "integer" && typeof target !== "number" &&
!Number.isInteger(target[key])
) {
throw new Error(`${key} type is ${properties[key].type}`);
}
if (
properties[key].type === "array" && typeof target !== "number" &&
Array.isArray(target[key]) && target[key].length === 0
) {
throw new Error(`array items empty`);
}
if (
typeof target !== "number" &&
properties[key].type !== "integer" &&
properties[key].type !== "array" &&
(properties[key].type !== typeof target[key])
) {
throw new Error(`${key} is ${properties[key].type}`);
}
}
return target;
} catch (error) {
throw createError("VALIDATE_OBJECT_ERROR", error);
}
}