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* @file transform protobuf
* @author atom-yang
*/
import { base58, decodeAddressRep } from './utils';
import { inputAddressFormatter } from './formatters';
const isWrappedBytes = (resolvedType, name) => {
if (!resolvedType.name || resolvedType.name !== name) {
return false;
}
if (!resolvedType.fieldsArray || resolvedType.fieldsArray.length !== 1) {
return false;
}
return resolvedType.fieldsArray[0].type === 'bytes';
};
const isAddress = resolvedType => isWrappedBytes(resolvedType, 'Address');
const isHash = resolvedType => isWrappedBytes(resolvedType, 'Hash');
export function transform(inputType, origin, transformers = []) {
const fieldsLength = (inputType.fieldsArray || []).length;
let result = origin;
if (fieldsLength === 0) {
return origin;
}
// eslint-disable-next-line no-restricted-syntax
for (const { filter, transformer } of transformers) {
if (filter(inputType) && origin) {
return transformer(origin);
}
}
// eslint-disable-next-line no-restricted-syntax
Object.keys(inputType.fields).forEach(field => {
const {
rule,
name,
resolvedType
} = inputType.fields[field];
if (resolvedType) {
if (rule && rule === 'repeated') {
let value = origin[name];
if (value && Array.isArray(value)) {
value = value
.filter(v => v !== null && v !== undefined)
.map(item => transform(resolvedType, item, transformers));
}
result = {
...result,
[name]: value
};
} else {
result = {
...result,
[name]: origin[name] !== null && origin[name] !== undefined
? transform(resolvedType, origin[name], transformers) : origin[name]
};
}
}
});
return result;
}
export function transformMapToArray(inputType, origin) {
const fieldsLength = inputType.fieldsArray ? inputType.fieldsArray.length : 0;
let result = origin;
if (!origin) {
return origin;
}
if (fieldsLength === 0 || (fieldsLength === 1 && !inputType.fieldsArray[0].resolvedType)) {
return origin;
}
// Params which satisfy address or hash format satisfy above first.
// if (isAddress(inputType) || isHash(inputType)) {
// return origin;
// }
const {
fields,
options = {}
} = inputType;
if (fieldsLength === 2 && fields.value && fields.key && options.map_entry === true) {
return Object.keys(origin).map(key => ({ key, value: origin[key] }));
}
// eslint-disable-next-line no-restricted-syntax
Object.keys(inputType.fields).forEach(field => {
const {
name,
resolvedType
} = inputType.fields[field];
if (resolvedType) {
if (origin[name] && Array.isArray(origin[name])) {
let value = origin[name];
value = value.map(item => transformMapToArray(resolvedType, item));
result = {
...result,
[name]: value
};
} else {
result = {
...result,
[name]: transformMapToArray(resolvedType, origin[name])
};
}
}
});
return result;
}
export function transformArrayToMap(inputType, origin) {
const fieldsLength = (inputType.fieldsArray || []).length;
let result = origin;
if (
fieldsLength === 0
|| (fieldsLength === 1 && !inputType.fieldsArray[0].resolvedType)
) {
return origin;
}
// Params which satisfy address or hash format satisfy above first.
// if (isAddress(inputType) || isHash(inputType)) {
// return origin;
// }
const { fields, options = {} } = inputType;
if (
fieldsLength === 2
&& fields.value
&& fields.key
&& options.map_entry === true
) {
return origin.reduce(
(acc, v) => ({
...acc,
[v.key]: v.value,
}),
{}
);
}
// eslint-disable-next-line no-restricted-syntax
Object.keys(fields).forEach(field => {
const { name, resolvedType } = fields[field];
if (resolvedType && origin !== null && origin !== undefined) {
if (origin[name] && Array.isArray(origin[name])) {
const {
fieldsArray = [],
fields: resolvedFields,
options: resolvedOptions = {},
} = resolvedType;
// eslint-disable-next-line max-len
if (
fieldsArray.length === 2
&& resolvedFields.value
&& resolvedFields.key
&& resolvedOptions.map_entry === true
) {
result = {
...result,
[name]: origin[name].reduce(
(acc, v) => ({
...acc,
[v.key]: v.value,
}),
{}
),
};
} else {
let value = origin[name];
value = value.map(item => transformArrayToMap(resolvedType, item));
result = {
...result,
[name]: value,
};
}
} else {
result = {
...result,
[name]: transformArrayToMap(resolvedType, origin[name]),
};
}
}
});
return result;
}
export const INPUT_TRANSFORMERS = [
{
filter: isAddress,
transformer: origin => {
let result = origin;
if (typeof origin === 'string') {
result = {
value: Buffer.from(decodeAddressRep(inputAddressFormatter(origin)), 'hex')
};
}
if (Array.isArray(origin)) {
result = origin.map(h => ({
value: Buffer.from(decodeAddressRep(inputAddressFormatter(h)), 'hex')
}));
}
return result;
}
},
{
filter: isHash,
transformer: origin => {
let result = origin;
if (typeof origin === 'string') {
result = {
value: Buffer.from(origin.replace('0x', ''), 'hex')
};
}
if (Array.isArray(origin)) {
result = origin.map(h => ({
value: Buffer.from(h.replace('0x', ''), 'hex')
}));
}
return result;
}
},
];
export function encodeAddress(str) {
const buf = Buffer.from(str, 'base64');
return base58.encode(buf);
}
export const OUTPUT_TRANSFORMERS = [
{
filter: isAddress,
transformer: origin => {
let result = origin;
if (Array.isArray(result)) {
result = result.map(h => encodeAddress(h.value));
} else if (typeof result !== 'string') {
result = encodeAddress(result.value);
}
return result;
}
},
{
filter: isHash,
transformer: origin => {
let result = origin;
if (Array.isArray(result)) {
result = result.map(h => Buffer.from(h.value, 'base64').toString('hex'));
} else if (typeof result !== 'string') {
result = Buffer.from(result.value, 'base64').toString('hex');
}
return result;
}
},
];
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