WIP

ui/v2.5/src/utils/text.ts

@@ -0,0 +1,83 @@
+export class TextUtils {
+
+  public static truncate(value?: string, limit: number = 100, tail: string = "..."): string {
+    if (!value) { return ""; }
+    return value.length > limit ? value.substring(0, limit) + tail : value;
+  }
+
+  public static fileSize(bytes: number = 0, precision: number = 2): string {
+    if (isNaN(parseFloat(String(bytes))) || !isFinite(bytes)) { return "?"; }
+
+    let unit = 0;
+    while ( bytes >= 1024 ) {
+      bytes /= 1024;
+      unit++;
+    }
+
+    return bytes.toFixed(+precision) + " " + this.units[unit];
+  }
+
+  public static secondsToTimestamp(seconds: number): string {
+    let ret = new Date(seconds * 1000).toISOString().substr(11, 8);
+
+    if (ret.startsWith("00")) {
+      // strip hours if under one hour
+      ret = ret.substr(3);
+    }
+    if (ret.startsWith("0")) {
+      // for duration under a minute, leave one leading zero
+      ret = ret.substr(1);
+    }
+    return ret;
+  }
+
+  public static fileNameFromPath(path: string): string {
+    if (!!path === false) { return "No File Name"; }
+    return path.replace(/^.*[\\\/]/, "");
+  }
+
+  public static age(dateString?: string, fromDateString?: string): number {
+    if (!dateString) { return 0; }
+
+    const birthdate = new Date(dateString);
+    const fromDate = !!fromDateString ? new Date(fromDateString) : new Date();
+
+    let age = fromDate.getFullYear() - birthdate.getFullYear();
+    if (birthdate.getMonth() > fromDate.getMonth() ||
+        (birthdate.getMonth() >= fromDate.getMonth() && birthdate.getDay() > fromDate.getDay())) {
+      age -= 1;
+    }
+
+    return age;
+  }
+
+  public static bitRate(bitrate: number) {
+    const megabits = bitrate / 1000000;
+    return `${megabits.toFixed(2)} megabits per second`;
+  }
+
+  public static resolution(height: number) {
+    if (height >= 240 && height < 480) {
+      return "240p";
+    } else if (height >= 480 && height < 720) {
+      return "480p";
+    } else if (height >= 720 && height < 1080) {
+      return "720p";
+    } else if (height >= 1080 && height < 2160) {
+      return "1080p";
+    } else if (height >= 2160) {
+      return "4K";
+    } else {
+      return undefined;
+    }
+  }
+
+  private static units = [
+    "bytes",
+    "kB",
+    "MB",
+    "GB",
+    "TB",
+    "PB",
+  ];
+}