Merge branch 'develop' into a11y-improvements

# Conflicts:
#	dist/plyr.js
#	dist/plyr.js.map
#	dist/plyr.min.js
#	dist/plyr.min.js.map
#	dist/plyr.polyfilled.js
#	dist/plyr.polyfilled.js.map
#	dist/plyr.polyfilled.min.js
#	dist/plyr.polyfilled.min.js.map
#	src/js/controls.js
#	src/js/fullscreen.js
#	src/js/plyr.js
#	src/js/ui.js
#	src/js/utils.js

1 files changed, 85 insertions, 0 deletions

diff --git a/src/js/utils/strings.js b/src/js/utils/strings.js
new file mode 100644
index 00000000..c872498c
--- /dev/null
+++ b/src/js/utils/strings.js
@@ -0,0 +1,85 @@
+// ==========================================================================
+// String utils
+// ==========================================================================
+
+import is from './is';
+
+// Generate a random ID
+export function generateId(prefix) {
+    return `${prefix}-${Math.floor(Math.random() * 10000)}`;
+}
+
+// Format string
+export function format(input, ...args) {
+    if (is.empty(input)) {
+        return input;
+    }
+
+    return input.toString().replace(/{(\d+)}/g, (match, i) => args[i].toString());
+}
+
+// Get percentage
+export function getPercentage(current, max) {
+    if (current === 0 || max === 0 || Number.isNaN(current) || Number.isNaN(max)) {
+        return 0;
+    }
+
+    return (current / max * 100).toFixed(2);
+}
+
+// Replace all occurances of a string in a string
+export function replaceAll(input = '', find = '', replace = '') {
+    return input.replace(
+        new RegExp(find.toString().replace(/([.*+?^=!:${}()|[\]/\\])/g, '\\$1'), 'g'),
+        replace.toString(),
+    );
+}
+
+// Convert to title case
+export function toTitleCase(input = '') {
+    return input.toString().replace(/\w\S*/g, text => text.charAt(0).toUpperCase() + text.substr(1).toLowerCase());
+}
+
+// Convert string to pascalCase
+export function toPascalCase(input = '') {
+    let string = input.toString();
+
+    // Convert kebab case
+    string = replaceAll(string, '-', ' ');
+
+    // Convert snake case
+    string = replaceAll(string, '_', ' ');
+
+    // Convert to title case
+    string = toTitleCase(string);
+
+    // Convert to pascal case
+    return replaceAll(string, ' ', '');
+}
+
+// Convert string to pascalCase
+export function toCamelCase(input = '') {
+    let string = input.toString();
+
+    // Convert to pascal case
+    string = toPascalCase(string);
+
+    // Convert first character to lowercase
+    return string.charAt(0).toLowerCase() + string.slice(1);
+}
+
+// Remove HTML from a string
+export function stripHTML(source) {
+    const fragment = document.createDocumentFragment();
+    const element = document.createElement('div');
+    fragment.appendChild(element);
+    element.innerHTML = source;
+    return fragment.firstChild.innerText;
+}
+
+// Like outerHTML, but also works for DocumentFragment
+export function getHTML(element) {
+    const wrapper = document.createElement('div');
+    wrapper.appendChild(element);
+    return wrapper.innerHTML;
+}