plane/apps/app/helpers/string.helper.ts
2023-02-23 22:34:36 +05:30

91 lines
2.5 KiB
TypeScript

export const addSpaceIfCamelCase = (str: string) => str.replace(/([a-z])([A-Z])/g, "$1 $2");
export const replaceUnderscoreIfSnakeCase = (str: string) => str.replace(/_/g, " ");
export const capitalizeFirstLetter = (str: string) => str.charAt(0).toUpperCase() + str.slice(1);
export const truncateText = (str: string, length: number) =>
str.length > length ? `${str.substring(0, length)}...` : str;
export const createSimilarString = (str: string) => {
const shuffled = str
.split("")
.sort(() => Math.random() - 0.5)
.join("");
return shuffled;
};
const fallbackCopyTextToClipboard = (text: string) => {
var textArea = document.createElement("textarea");
textArea.value = text;
// Avoid scrolling to bottom
textArea.style.top = "0";
textArea.style.left = "0";
textArea.style.position = "fixed";
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
// FIXME: Even though we are using this as a fallback, execCommand is deprecated 👎. We should find a better way to do this.
// https://developer.mozilla.org/en-US/docs/Web/API/Document/execCommand
var successful = document.execCommand("copy");
var msg = successful ? "successful" : "unsuccessful";
console.log("Fallback: Copying text command was " + msg);
} catch (err) {
console.error("Fallback: Oops, unable to copy", err);
}
document.body.removeChild(textArea);
};
export const copyTextToClipboard = async (text: string) => {
if (!navigator.clipboard) {
fallbackCopyTextToClipboard(text);
return;
}
await navigator.clipboard.writeText(text);
};
const wordsVector = (str: string) => {
const words = str.split(" ");
const vector: any = {};
for (let i = 0; i < words.length; i++) {
const word = words[i];
if (vector[word]) {
vector[word] += 1;
} else {
vector[word] = 1;
}
}
return vector;
};
export const cosineSimilarity = (a: string, b: string) => {
const vectorA = wordsVector(a.trim());
const vectorB = wordsVector(b.trim());
const vectorAKeys = Object.keys(vectorA);
const vectorBKeys = Object.keys(vectorB);
const union = vectorAKeys.concat(vectorBKeys);
let dotProduct = 0;
let magnitudeA = 0;
let magnitudeB = 0;
for (let i = 0; i < union.length; i++) {
const key = union[i];
const valueA = vectorA[key] || 0;
const valueB = vectorB[key] || 0;
dotProduct += valueA * valueB;
magnitudeA += valueA * valueA;
magnitudeB += valueB * valueB;
}
return dotProduct / Math.sqrt(magnitudeA * magnitudeB);
};