80 lines
2.6 KiB
JavaScript
80 lines
2.6 KiB
JavaScript
'use strict';
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const pragmaUtil = require('./pragma');
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const variableUtil = require('./variable');
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/**
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* Check if variable is destructured from pragma import
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*
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* @param {string} variable The variable name to check
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* @param {Context} context eslint context
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* @returns {Boolean} True if createElement is destructured from the pragma
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*/
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module.exports = function isDestructuredFromPragmaImport(variable, context) {
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const pragma = pragmaUtil.getFromContext(context);
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const variables = variableUtil.variablesInScope(context);
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const variableInScope = variableUtil.getVariable(variables, variable);
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if (variableInScope) {
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const latestDef = variableUtil.getLatestVariableDefinition(variableInScope);
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if (latestDef) {
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// check if latest definition is a variable declaration: 'variable = value'
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if (latestDef.node.type === 'VariableDeclarator' && latestDef.node.init) {
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// check for: 'variable = pragma.variable'
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if (
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latestDef.node.init.type === 'MemberExpression'
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&& latestDef.node.init.object.type === 'Identifier'
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&& latestDef.node.init.object.name === pragma
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) {
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return true;
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}
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// check for: '{variable} = pragma'
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if (
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latestDef.node.init.type === 'Identifier'
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&& latestDef.node.init.name === pragma
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) {
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return true;
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}
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// "require('react')"
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let requireExpression = null;
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// get "require('react')" from: "{variable} = require('react')"
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if (latestDef.node.init.type === 'CallExpression') {
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requireExpression = latestDef.node.init;
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}
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// get "require('react')" from: "variable = require('react').variable"
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if (
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!requireExpression
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&& latestDef.node.init.type === 'MemberExpression'
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&& latestDef.node.init.object.type === 'CallExpression'
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) {
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requireExpression = latestDef.node.init.object;
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}
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// check proper require.
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if (
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requireExpression
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&& requireExpression.callee
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&& requireExpression.callee.name === 'require'
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&& requireExpression.arguments[0]
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&& requireExpression.arguments[0].value === pragma.toLocaleLowerCase()
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) {
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return true;
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}
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return false;
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}
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// latest definition is an import declaration: import {<variable>} from 'react'
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if (
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latestDef.parent
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&& latestDef.parent.type === 'ImportDeclaration'
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&& latestDef.parent.source.value === pragma.toLocaleLowerCase()
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) {
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return true;
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}
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}
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}
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return false;
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};
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