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utils.ts
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/* eslint-disable no-new-func */
import {
IDataSourceRuntimeContext,
InterpretDataSourceConfig,
isJSExpression,
isJSFunction,
IPublicTypeJSExpression,
IPublicTypeJSFunction,
RuntimeOptionsConfig,
} from '@alilc/lowcode-types';
import { CompositeValue, JSONObject } from '@alilc/lowcode-datasource-types';
function isObject(obj: unknown) {
return Object.prototype.toString.call(obj).indexOf('Object') !== -1;
}
export const transformExpression = (code: string, context: IDataSourceRuntimeContext) => {
// 补充异常情况兼容性
if (code === undefined) {
return function () {};
}
if (code === '') {
return function () { return ''; };
}
try {
return new Function(`return (${code})`).call(context);
} catch (error) {
console.error(`transformExpression error, code is ${code}, context is ${context}, error is ${error}`);
}
};
export const transformFunction = (code: string, context: IDataSourceRuntimeContext) => {
if (code === undefined) {
return function () {};
}
if (code === '') {
return function () { return ''; };
}
try {
return new Function(`return (${code})`).call(context).bind(context);
} catch (error) {
console.error(`transformFunction error, code is ${code}, context is ${context}, error is ${error}`);
}
};
export const transformBoolStr = (str: string) => {
return str !== 'false';
};
export const getRuntimeJsValue = (value: IPublicTypeJSExpression | IPublicTypeJSFunction, context: IDataSourceRuntimeContext) => {
if (!['JSExpression', 'JSFunction'].includes(value.type)) {
console.error(`translate error, value is ${JSON.stringify(value)}`);
return '';
}
// TODO: 类型修复
const code = value.compiled || value.value;
return value.type === 'JSFunction' ? transformFunction(code, context) : transformExpression(code, context);
};
export const getRuntimeBaseValue = (type: string, value: any) => {
switch (type) {
case 'string':
return `${value}`;
case 'boolean':
return typeof value === 'string' ? transformBoolStr(value as string) : !!value;
case 'number':
return Number(value);
default:
return value;
}
};
export const getRuntimeValueFromConfig = (type: string, value: CompositeValue, context: IDataSourceRuntimeContext) => {
if (value === undefined) {
return undefined;
}
if (isJSExpression(value) || isJSFunction(value)) {
return getRuntimeBaseValue(type, getRuntimeJsValue(value, context));
}
return value;
};
export const buildJsonObj = (params: JSONObject | IPublicTypeJSExpression, context: IDataSourceRuntimeContext) => {
if (isJSExpression(params)) {
return transformExpression(params.value, context);
} else if (isObject(params)) { // 处理params内部为JSExpression的问题
const newParams: Record<string, unknown> = {};
for (const [name, param] of Object.entries(params)) {
if (isJSExpression(param)) {
newParams[name] = transformExpression(param?.value, context);
} else if (isObject(param)) {
newParams[name] = buildJsonObj(param as JSONObject, context);
} else {
newParams[name] = param;
}
}
return newParams;
}
return params;
};
export const buildShouldFetch = (ds: InterpretDataSourceConfig, context: IDataSourceRuntimeContext) => {
if (!ds.options || !ds.shouldFetch) {
return true; // 默认为 true
}
if (isJSExpression(ds.shouldFetch) || isJSFunction(ds.shouldFetch)) {
return getRuntimeJsValue(ds.shouldFetch, context);
}
return getRuntimeBaseValue('boolean', ds.shouldFetch);
};
export const buildOptions = (ds: InterpretDataSourceConfig, context: IDataSourceRuntimeContext) => {
const { options } = ds;
if (!options) return undefined;
// eslint-disable-next-line space-before-function-paren
return function () {
// 默认值
const fetchOptions: RuntimeOptionsConfig = {
uri: '',
params: {},
method: 'GET',
isCors: true,
timeout: 5000,
headers: undefined,
v: '1.0',
};
Object.keys(options).forEach((key: string) => {
switch (key) {
case 'uri':
fetchOptions.uri = getRuntimeValueFromConfig('string', options.uri, context);
break;
case 'params':
fetchOptions.params = buildJsonObj(options.params!, context);
break;
case 'method':
fetchOptions.method = getRuntimeValueFromConfig('string', options.method, context);
break;
case 'isCors':
fetchOptions.isCors = getRuntimeValueFromConfig('boolean', options.isCors, context);
break;
case 'timeout':
fetchOptions.timeout = getRuntimeValueFromConfig('number', options.timeout, context);
break;
case 'headers':
fetchOptions.headers = buildJsonObj(options.headers!, context);
break;
case 'v':
fetchOptions.v = getRuntimeValueFromConfig('string', options.v, context);
break;
default:
// 其余的除了做表达式或者 function 的转换，直接透传
fetchOptions[key] = getRuntimeValueFromConfig('unknown', options[key], context);
}
});
return fetchOptions;
};
};