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predicates.ts
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predicates.ts
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import { findLongestStreak } from "./utils/findLongestStreak.ts";
import { getNumberOfSharedLetters } from "./utils/getNumberOfSharedLetters.ts";
import { removeConsecutiveDuplicates } from "./utils/removeConsecutiveDuplicates.ts";
import { replaceDiacritics } from "./utils/replaceDiacritics.ts";
import { replaceVowels } from "./utils/replaceVowels.ts";
import { levenshteinDistance } from "./utils/levenshteinDistance.ts";
export enum PredicateEnum {
hasExactMatch = "hasExactMatch",
hasExactMatchWithDiacritics = "hasExactMatchWithDiacritics",
hasLettersInOrder = "hasLettersInOrder",
isSimilarWithoutConsecutives = "isSimilarWithoutConsecutives",
hasDiacriticsInOrder = "hasDiacriticsInOrder",
isLongestStreak3orMore = "isLongestStreak3orMore",
isLongestStreak4orMore = "isLongestStreak4orMore",
has3OrMoreSharedLetters = "has3OrMoreSharedLetters",
isSameFirstLetter = "isSameFirstLetter",
isSameFirst2Letters = "isSameFirst2Letters",
isSameFirst3Letters = "isSameFirst3Letters",
isSameFirst4Letters = "isSameFirst4Letters",
isSameLength = "isSameLength",
areMoreThanHalfLettersShared = "areMoreThanHalfLettersShared",
hasExactMatchWithoutVowels = "hasExactMatchWithoutVowels",
isDistanceLessThan50Percent = "isDistanceLessThan50Percent",
isDistanceLessThan20Percent = "isDistanceLessThan20Percent",
isDistanceLessThan10Percent = "isDistanceLessThan10Percent",
}
type Predicate = (input: string, string: string) => boolean;
type Predicates = {
[k in PredicateEnum]: Predicate;
};
export const predicates: Predicates = {
[PredicateEnum.hasExactMatch]: (input: string, string: string) =>
string.includes(input),
[PredicateEnum.hasExactMatchWithDiacritics]: (
input: string,
string: string
) => replaceDiacritics(string).includes(replaceDiacritics(input)),
[PredicateEnum.hasLettersInOrder]: (input: string, string: string) => {
let result = true;
let str = string;
for (const char of input) {
const indexOf = str.indexOf(char);
if (indexOf >= 0) str = str.slice(indexOf);
else result = false;
}
return result;
},
[PredicateEnum.isSimilarWithoutConsecutives]: (
input: string,
string: string
) => {
const inputWithoutCons = removeConsecutiveDuplicates(input);
const stringWithoutCons = removeConsecutiveDuplicates(string);
return predicates[PredicateEnum.hasLettersInOrder](
inputWithoutCons,
stringWithoutCons
);
},
[PredicateEnum.hasDiacriticsInOrder]: (input: string, string: string) => {
const inputWithoutDiatrics = replaceDiacritics(input);
const stringWithoutDiatrics = replaceDiacritics(string);
return predicates[PredicateEnum.hasLettersInOrder](
inputWithoutDiatrics,
stringWithoutDiatrics
);
},
[PredicateEnum.isLongestStreak3orMore]: (input: string, string: string) =>
findLongestStreak(input, string) >= 3,
[PredicateEnum.isLongestStreak4orMore]: (input: string, string: string) =>
findLongestStreak(input, string) >= 4,
[PredicateEnum.has3OrMoreSharedLetters]: (input: string, string: string) =>
getNumberOfSharedLetters(input, string) >= 3,
[PredicateEnum.isSameFirstLetter]: (input: string, string: string) => {
const l1 = replaceDiacritics(input.charAt(0));
const l2 = replaceDiacritics(string.charAt(0));
return l1 === l2;
},
[PredicateEnum.isSameFirst2Letters]: (input: string, string: string) => {
const l1 = replaceDiacritics(input.slice(0, 2));
const l2 = replaceDiacritics(string.slice(0, 2));
return l1 === l2;
},
[PredicateEnum.isSameFirst3Letters]: (input: string, string: string) => {
const l1 = replaceDiacritics(input.slice(0, 3));
const l2 = replaceDiacritics(string.slice(0, 3));
return l1 === l2;
},
[PredicateEnum.isSameFirst4Letters]: (input: string, string: string) => {
const l1 = replaceDiacritics(input.slice(0, 4));
const l2 = replaceDiacritics(string.slice(0, 4));
return l1 === l2;
},
[PredicateEnum.isSameLength]: (input: string, string: string) =>
input.length === string.length,
[PredicateEnum.areMoreThanHalfLettersShared]: (
input: string,
string: string
) => {
const sharedLetters = getNumberOfSharedLetters(
replaceDiacritics(input),
replaceDiacritics(string)
);
return sharedLetters / input.length > 0.5;
},
[PredicateEnum.hasExactMatchWithoutVowels]: (input: string, string: string) =>
replaceVowels(string).includes(replaceVowels(input)),
[PredicateEnum.isDistanceLessThan50Percent]: (
input: string,
string: string
) => {
const d = levenshteinDistance(input, string);
return d / input.length <= 0.5;
},
[PredicateEnum.isDistanceLessThan20Percent]: (
input: string,
string: string
) => {
const d = levenshteinDistance(input, string);
return d / input.length <= 0.2;
},
[PredicateEnum.isDistanceLessThan10Percent]: (
input: string,
string: string
) => {
const d = levenshteinDistance(input, string);
return d / input.length <= 0.1;
},
};