Implemented v1

uwuify.js

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+const uwuify = {
+    // The prefix used in console messages
+    CONSOLE_PREFIX: '[uwuify.js] ',
+    // The range of time to wait between uwuification
+    INTERVAL_MIN: 10000,
+    INTERVAL_MAX: 60000,
+    // Which characters to uwuify
+    TARGET_REGEX: /[LRlr]+/g,
+    // All the #text objects to modify
+    TARGET_ELEMENTS: [],
+
+    // Gets all #text elements on the page
+    getTexts: function(object) {
+        let res = [];
+
+        for (let i = 0; i < object.childNodes.length; i++) {
+            if (object.childNodes[i].nodeName == '#text') {
+                res.push(object.childNodes[i]);
+            } else {
+                res = res.concat(uwuify.getTexts(object.childNodes[i]));
+            }
+        }
+
+        return res;
+    },
+
+    // Generates a random integer between min and max
+    getRandomInt: function (min, max) {
+        const minCeiled = Math.ceil(min);
+        const maxFloored = Math.floor(max);
+        return Math.floor(Math.random() * (maxFloored - minCeiled) + minCeiled); // The maximum is exclusive and the minimum is inclusive
+    },
+
+    // Returns true if a string is able to be uwued
+    isUwuable: function(string) {
+        let res = Boolean(uwuify.TARGET_REGEX.exec(string));
+        uwuify.TARGET_REGEX.lastIndex = 0
+        return res;
+    },
+
+    // Uwuify a random target
+    uwuify: function() {
+        let targetIdx = uwuify.getRandomInt(0, uwuify.TARGET_ELEMENTS.length);
+
+        let shifts = 0;
+        let element = uwuify.TARGET_ELEMENTS[targetIdx]
+        let text = element.textContent;
+        while (!uwuify.isUwuable(text) && shifts < uwuify.TARGET_ELEMENTS.length) {
+            shifts++;
+            element = uwuify.TARGET_ELEMENTS[(targetIdx+shifts)%uwuify.TARGET_ELEMENTS.length];
+            text = element.textContent;
+        }
+
+        if (!uwuify.isUwuable(text)) {
+            console.info(`${uwuify.CONSOLE_PREFIX} No more text to uwuify.`);
+            // Return from the function, preventing the next setTimeout().
+            return
+        }
+
+        let matches = text.matchAll(uwuify.TARGET_REGEX).toArray();
+        let matchIdx = uwuify.getRandomInt(0, matches.length);
+        let match = matches[matchIdx];
+
+        for (let chrOff = 0; chrOff < match[0].length; chrOff++) {
+            let chrIdx = match.index + chrOff;
+            let isUpper = text[chrIdx] == text[chrIdx].toUpperCase();
+            element.textContent = text.slice(0, chrIdx) + (isUpper ? 'W' : 'w') + text.slice(chrIdx+1);1
+        }
+
+        setTimeout(uwuify.uwuify, uwuify.getRandomInt(uwuify.INTERVAL_MIN, uwuify.INTERVAL_MAX));
+    }
+};
+
+
+
+window.addEventListener('load', () => {
+    console.debug(`${uwuify.CONSOLE_PREFIX} Document loaded.`);
+    let elements = uwuify.getTexts(document.body);
+    for (let i = 0; i < elements.length; i++) {
+        if (uwuify.isUwuable(elements[i].textContent)) {
+            uwuify.TARGET_ELEMENTS.push(elements[i]);
+        }
+    }
+    setTimeout(uwuify.uwuify, uwuify.getRandomInt(uwuify.INTERVAL_MIN, uwuify.INTERVAL_MAX));
+});