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/**
*
* Copyright 2023-2025 InspectorRAGet Team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**/
'use client';
import { isEmpty } from 'lodash';
import { useState, useEffect } from 'react';
import { TextArea, Button } from '@carbon/react';
import { WarningAlt } from '@carbon/icons-react';
import { Model, Metric } from '@/src/types';
import {
PLACHOLDER_EXPRESSION_TEXT,
validate,
} from '@/src/utilities/expressions';
import classes from './ExpressionBuilder.module.scss';
// ===================================================================================
// TYPES
// ===================================================================================
interface Props {
expression?: object;
models?: Model[];
metric?: Metric;
setExpression?: Function;
}
// ===================================================================================
// MAIN FUNCTION
// ===================================================================================
export default function ExpressionBuilder({
expression,
models,
metric,
setExpression,
}: Props) {
// Step 1: Initialize state and necessary variables
const [updatedExpressionText, setUpdatedExpressionText] = useState<string>(
expression ? JSON.stringify(expression) : PLACHOLDER_EXPRESSION_TEXT,
);
const [errorMessage, setErrorMessage] = useState<string>();
// Step 2: Run effects
// Step 2.a: Validate expression when updated
useEffect(() => {
try {
// Step 2.a: Check JSON validity
const updatedExpression = JSON.parse(updatedExpressionText);
// Step 2.b: Check expression validity
const errorMessage = validate(
updatedExpression,
models?.map((model) => model.modelId),
);
if (errorMessage) {
setErrorMessage(errorMessage);
} else {
setErrorMessage(undefined);
}
} catch (err) {
setErrorMessage('Invalid JSON');
}
}, [updatedExpressionText]);
return (
<div className={classes.page}>
<TextArea
labelText="Expression"
placeholder={JSON.stringify(expression)}
value={updatedExpressionText}
disabled={
models === undefined ||
metric === undefined ||
setExpression === undefined
}
invalid={errorMessage !== undefined}
invalidText={errorMessage}
onChange={(event) => {
setUpdatedExpressionText(event.target.value);
}}
helperText="Please make sure you select correct model ids and values"
rows={4}
id="text-area__expression"
/>
<div className={classes.actionButtons}>
<Button
kind="primary"
disabled={
errorMessage !== undefined ||
models === undefined ||
metric === undefined ||
setExpression === undefined
}
onClick={() =>
setExpression
? setExpression(JSON.parse(updatedExpressionText))
: () => {}
}
>
Run
</Button>
<Button
kind="secondary"
disabled={expression === undefined || isEmpty(expression)}
onClick={() => {
// Step 1: Reset updated expression text
setUpdatedExpressionText('{}');
// Step 2: Reset expression
if (setExpression) {
setExpression({});
}
}}
>
Clear
</Button>
</div>
{models === undefined || metric === undefined ? (
<div className={classes.containerWarning}>
<WarningAlt />
<span>You must select a metric before proceeding.</span>
</div>
) : null}
</div>
);
}
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