1 | 'use strict';
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2 |
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3 | const leven = require('leven');
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4 | const rules = require('./rules');
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5 |
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6 | const MAX_LEVENSHTEIN_DISTANCE = 6;
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7 | const MAX_SUGGESTIONS_COUNT = 3;
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8 |
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9 |
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10 |
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11 |
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12 |
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13 | function extractSuggestions(ruleName) {
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14 | const suggestions = new Array(MAX_LEVENSHTEIN_DISTANCE);
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15 |
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16 | for (let i = 0; i < suggestions.length; i++) {
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17 | suggestions[i] = [];
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18 | }
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19 |
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20 | rules.forEach((existRuleName) => {
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21 | const distance = leven(existRuleName, ruleName);
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22 |
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23 | if (distance <= MAX_LEVENSHTEIN_DISTANCE) {
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24 | suggestions[distance - 1].push(existRuleName);
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25 | }
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26 | });
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27 |
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28 |
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29 | let result = [];
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30 |
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31 | for (let i = 0; i < suggestions.length; i++) {
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32 | if (suggestions[i].length > 0) {
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33 | if (i < 3) {
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34 | return suggestions[i].slice(0, MAX_SUGGESTIONS_COUNT);
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35 | }
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36 |
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37 | result = result.concat(suggestions[i]);
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38 | }
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39 | }
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40 |
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41 | return result.slice(0, MAX_SUGGESTIONS_COUNT);
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42 | }
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43 |
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44 |
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45 |
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46 |
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47 |
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48 |
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49 | function rejectMessage(ruleName, suggestions = []) {
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50 | return `Unknown rule ${ruleName}.${
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51 | suggestions.length > 0 ? ` Did you mean ${suggestions.join(', ')}?` : ''
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52 | }`;
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53 | }
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54 |
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55 |
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56 | const cache = new Map();
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57 |
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58 |
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59 |
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60 |
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61 |
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62 |
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63 |
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64 | module.exports = function reportUnknownRuleNames(unknownRuleName, postcssRoot, postcssResult) {
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65 | const suggestions = cache.has(unknownRuleName)
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66 | ? (cache.get(unknownRuleName))
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67 | : extractSuggestions(unknownRuleName);
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68 | const warningProperties = {
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69 | severity: 'error',
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70 | rule: unknownRuleName,
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71 | node: postcssRoot,
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72 | index: 0,
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73 | };
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74 |
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75 | cache.set(unknownRuleName, suggestions);
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76 | postcssResult.warn(rejectMessage(unknownRuleName, suggestions), warningProperties);
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77 | };
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