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6 |
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7 | 'use strict'
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8 |
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9 | const getDocsUrl = require('./lib/get-docs-url')
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10 | const isPromise = require('./lib/is-promise')
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11 |
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12 | module.exports = {
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13 | meta: {
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14 | docs: {
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15 | url: getDocsUrl('catch-or-return')
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16 | },
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17 | messages: {
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18 | terminationMethod: 'Expected {{ terminationMethod }}() or return'
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19 | }
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20 | },
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21 | create(context) {
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22 | const options = context.options[0] || {}
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23 | const allowThen = options.allowThen
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24 | const allowFinally = options.allowFinally
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25 | let terminationMethod = options.terminationMethod || 'catch'
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26 |
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27 | if (typeof terminationMethod === 'string') {
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28 | terminationMethod = [terminationMethod]
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29 | }
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30 |
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31 | function isAllowedPromiseTermination(expression) {
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32 |
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33 | if (
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34 | allowThen &&
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35 | expression.type === 'CallExpression' &&
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36 | expression.callee.type === 'MemberExpression' &&
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37 | expression.callee.property.name === 'then' &&
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38 | expression.arguments.length === 2
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39 | ) {
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40 | return true
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41 | }
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42 |
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43 |
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44 | if (
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45 | allowFinally &&
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46 | expression.type === 'CallExpression' &&
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47 | expression.callee.type === 'MemberExpression' &&
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48 | expression.callee.property.name === 'finally' &&
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49 | isPromise(expression.callee.object) &&
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50 | isAllowedPromiseTermination(expression.callee.object)
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51 | ) {
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52 | return true
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53 | }
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54 |
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55 |
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56 | if (
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57 | expression.type === 'CallExpression' &&
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58 | expression.callee.type === 'MemberExpression' &&
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59 | terminationMethod.indexOf(expression.callee.property.name) !== -1
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60 | ) {
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61 | return true
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62 | }
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63 |
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64 |
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65 | if (
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66 | expression.type === 'CallExpression' &&
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67 | expression.callee.type === 'MemberExpression' &&
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68 | expression.callee.property.type === 'Literal' &&
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69 | expression.callee.property.value === 'catch'
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70 | ) {
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71 | return true
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72 | }
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73 |
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74 | return false
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75 | }
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76 |
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77 | return {
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78 | ExpressionStatement(node) {
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79 | if (!isPromise(node.expression)) {
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80 | return
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81 | }
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82 |
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83 | if (isAllowedPromiseTermination(node.expression)) {
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84 | return
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85 | }
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86 |
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87 | context.report({
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88 | node,
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89 | messageId: 'terminationMethod',
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90 | data: { terminationMethod }
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91 | })
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92 | }
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93 | }
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94 | }
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95 | }
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