[CL-7] Avatar

apps/web/src/app/vault/organization-badge/organization-name-badge.component.ts

@@ -1,6 +1,7 @@
 import { Component, EventEmitter, Input, OnInit, Output } from "@angular/core";
 
 import { I18nService } from "@bitwarden/common/abstractions/i18n.service";
+import { Utils } from "@bitwarden/common/misc/utils";
 
 @Component({
   selector: "app-org-badge",
@@ -20,37 +21,12 @@ export class OrganizationNameBadgeComponent implements OnInit {
   ngOnInit(): void {
     if (this.organizationName == null || this.organizationName === "") {
       this.organizationName = this.i18nService.t("me");
-      this.color = this.stringToColor(this.profileName.toUpperCase());
+      this.color = Utils.stringToColor(this.profileName.toUpperCase());
     }
     if (this.color == null) {
-      this.color = this.stringToColor(this.organizationName.toUpperCase());
+      this.color = Utils.stringToColor(this.organizationName.toUpperCase());
     }
-    this.textColor = this.pickTextColorBasedOnBgColor();
-  }
-
-  // This value currently isn't stored anywhere, only calculated in the app-avatar component
-  // Once we are allowing org colors to be changed and saved, change this out
-  private stringToColor(str: string): string {
-    let hash = 0;
-    for (let i = 0; i < str.length; i++) {
-      hash = str.charCodeAt(i) + ((hash << 5) - hash);
-    }
-    let color = "#";
-    for (let i = 0; i < 3; i++) {
-      const value = (hash >> (i * 8)) & 0xff;
-      color += ("00" + value.toString(16)).substr(-2);
-    }
-    return color;
-  }
-
-  // There are a few ways to calculate text color for contrast, this one seems to fit accessibility guidelines best.
-  // https://stackoverflow.com/a/3943023/6869691
-  private pickTextColorBasedOnBgColor() {
-    const color = this.color.charAt(0) === "#" ? this.color.substring(1, 7) : this.color;
-    const r = parseInt(color.substring(0, 2), 16); // hexToR
-    const g = parseInt(color.substring(2, 4), 16); // hexToG
-    const b = parseInt(color.substring(4, 6), 16); // hexToB
-    return r * 0.299 + g * 0.587 + b * 0.114 > 186 ? "black !important" : "white !important";
+    this.textColor = Utils.pickTextColorBasedOnBgColor(this.color);
   }
 
   emitOnOrganizationClicked() {

libs/angular/src/components/avatar.component.ts

@@ -68,7 +68,7 @@ export class AvatarComponent implements OnChanges, OnInit {
       }
 
       const charObj = this.getCharText(chars);
-      const color = this.stringToColor(upperData);
+      const color = Utils.stringToColor(upperData);
       const svg = this.getSvg(this.size, color);
       svg.appendChild(charObj);
       const html = window.document.createElement("div").appendChild(svg).outerHTML;
@@ -77,19 +77,6 @@ export class AvatarComponent implements OnChanges, OnInit {
     }
   }
 
-  private stringToColor(str: string): string {
-    let hash = 0;
-    for (let i = 0; i < str.length; i++) {
-      hash = str.charCodeAt(i) + ((hash << 5) - hash);
-    }
-    let color = "#";
-    for (let i = 0; i < 3; i++) {
-      const value = (hash >> (i * 8)) & 0xff;
-      color += ("00" + value.toString(16)).substr(-2);
-    }
-    return color;
-  }
-
   private getFirstLetters(data: string, count: number): string {
     const parts = data.split(" ");
     if (parts.length > 1) {

libs/common/src/misc/utils.ts

@@ -370,6 +370,39 @@ export class Utils {
     return s.charAt(0).toUpperCase() + s.slice(1);
   }
 
+  /**
+   * There are a few ways to calculate text color for contrast, this one seems to fit accessibility guidelines best.
+   * https://stackoverflow.com/a/3943023/6869691
+   *
+   * @param {string} bgColor
+   * @param {number} [threshold] see stackoverflow link above
+   * @param {boolean} [svgTextFill]
+   * Indicates if this method is performed on an SVG <text> 'fill' attribute (e.g. <text fill="black"></text>).
+   * This check is necessary because the '!important' tag cannot be used in a 'fill' attribute.
+   */
+  static pickTextColorBasedOnBgColor(bgColor: string, threshold = 186, svgTextFill = false) {
+    const bgColorHexNums = bgColor.charAt(0) === "#" ? bgColor.substring(1, 7) : bgColor;
+    const r = parseInt(bgColorHexNums.substring(0, 2), 16); // hexToR
+    const g = parseInt(bgColorHexNums.substring(2, 4), 16); // hexToG
+    const b = parseInt(bgColorHexNums.substring(4, 6), 16); // hexToB
+    const blackColor = svgTextFill ? "black" : "black !important";
+    const whiteColor = svgTextFill ? "white" : "white !important";
+    return r * 0.299 + g * 0.587 + b * 0.114 > threshold ? blackColor : whiteColor;
+  }
+
+  static stringToColor(str: string): string {
+    let hash = 0;
+    for (let i = 0; i < str.length; i++) {
+      hash = str.charCodeAt(i) + ((hash << 5) - hash);
+    }
+    let color = "#";
+    for (let i = 0; i < 3; i++) {
+      const value = (hash >> (i * 8)) & 0xff;
+      color += ("00" + value.toString(16)).substr(-2);
+    }
+    return color;
+  }
+
   /**
    * @throws Will throw an error if the ContainerService has not been attached to the window object
    */

libs/components/src/avatar/avatar.component.ts

@@ -0,0 +1,127 @@
+import { Component, Input, OnChanges } from "@angular/core";
+import { DomSanitizer, SafeResourceUrl } from "@angular/platform-browser";
+
+import { Utils } from "@bitwarden/common/misc/utils";
+
+type SizeTypes = "large" | "default" | "small";
+
+const SizeClasses: Record<SizeTypes, string[]> = {
+  large: ["tw-h-16", "tw-w-16"],
+  default: ["tw-h-12", "tw-w-12"],
+  small: ["tw-h-7", "tw-w-7"],
+};
+
+@Component({
+  selector: "bit-avatar",
+  template: `<img *ngIf="src" [src]="src" title="{{ text }}" [ngClass]="classList" />`,
+})
+export class AvatarComponent implements OnChanges {
+  @Input() border = false;
+  @Input() color: string;
+  @Input() id: number;
+  @Input() text: string;
+  @Input() size: SizeTypes = "default";
+
+  private svgCharCount = 2;
+  private svgFontSize = 20;
+  private svgFontWeight = 300;
+  private svgSize = 48;
+  src: SafeResourceUrl;
+
+  constructor(public sanitizer: DomSanitizer) {}
+
+  ngOnChanges() {
+    this.generate();
+  }
+
+  get classList() {
+    return ["tw-rounded-full"]
+      .concat(SizeClasses[this.size] ?? [])
+      .concat(this.border ? ["tw-border", "tw-border-solid", "tw-border-secondary-500"] : []);
+  }
+
+  private generate() {
+    let chars: string = null;
+    const upperCaseText = this.text.toUpperCase();
+
+    chars = this.getFirstLetters(upperCaseText, this.svgCharCount);
+
+    if (chars == null) {
+      chars = this.unicodeSafeSubstring(upperCaseText, this.svgCharCount);
+    }
+
+    // If the chars contain an emoji, only show it.
+    if (chars.match(Utils.regexpEmojiPresentation)) {
+      chars = chars.match(Utils.regexpEmojiPresentation)[0];
+    }
+
+    let svg: HTMLElement;
+    let hexColor = this.color;
+
+    if (this.color != null) {
+      svg = this.createSvgElement(this.svgSize, hexColor);
+    } else if (this.id != null) {
+      hexColor = Utils.stringToColor(this.id.toString());
+      svg = this.createSvgElement(this.svgSize, hexColor);
+    } else {
+      hexColor = Utils.stringToColor(upperCaseText);
+      svg = this.createSvgElement(this.svgSize, hexColor);
+    }
+
+    const charObj = this.createTextElement(chars, hexColor);
+    svg.appendChild(charObj);
+    const html = window.document.createElement("div").appendChild(svg).outerHTML;
+    const svgHtml = window.btoa(unescape(encodeURIComponent(html)));
+    this.src = this.sanitizer.bypassSecurityTrustResourceUrl(
+      "data:image/svg+xml;base64," + svgHtml
+    );
+  }
+
+  private getFirstLetters(data: string, count: number): string {
+    const parts = data.split(" ");
+    if (parts.length > 1) {
+      let text = "";
+      for (let i = 0; i < count; i++) {
+        text += this.unicodeSafeSubstring(parts[i], 1);
+      }
+      return text;
+    }
+    return null;
+  }
+
+  private createSvgElement(size: number, color: string): HTMLElement {
+    const svgTag = window.document.createElement("svg");
+    svgTag.setAttribute("xmlns", "http://www.w3.org/2000/svg");
+    svgTag.setAttribute("pointer-events", "none");
+    svgTag.setAttribute("width", size.toString());
+    svgTag.setAttribute("height", size.toString());
+    svgTag.style.backgroundColor = color;
+    svgTag.style.width = size + "px";
+    svgTag.style.height = size + "px";
+    return svgTag;
+  }
+
+  private createTextElement(character: string, color: string): HTMLElement {
+    const textTag = window.document.createElement("text");
+    textTag.setAttribute("text-anchor", "middle");
+    textTag.setAttribute("y", "50%");
+    textTag.setAttribute("x", "50%");
+    textTag.setAttribute("dy", "0.35em");
+    textTag.setAttribute("pointer-events", "auto");
+    textTag.setAttribute("fill", Utils.pickTextColorBasedOnBgColor(color, 135, true));
+    textTag.setAttribute(
+      "font-family",
+      '"Open Sans","Helvetica Neue",Helvetica,Arial,' +
+        'sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol"'
+    );
+    textTag.textContent = character;
+    textTag.style.fontWeight = this.svgFontWeight.toString();
+    textTag.style.fontSize = this.svgFontSize + "px";
+    return textTag;
+  }
+
+  private unicodeSafeSubstring(str: string, count: number) {
+    const characters = str.match(/./gu);
+    return characters != null ? characters.slice(0, count).join("") : "";
+  }
+}

libs/components/src/avatar/avatar.module.ts

@@ -0,0 +1,11 @@
+import { CommonModule } from "@angular/common";
+import { NgModule } from "@angular/core";
+
+import { AvatarComponent } from "./avatar.component";
+
+@NgModule({
+  imports: [CommonModule],
+  exports: [AvatarComponent],
+  declarations: [AvatarComponent],
+})
+export class AvatarModule {}

libs/components/src/avatar/avatar.stories.ts

@@ -0,0 +1,60 @@
+import { Meta, Story } from "@storybook/angular";
+
+import { AvatarComponent } from "./avatar.component";
+
+export default {
+  title: "Component Library/Avatar",
+  component: AvatarComponent,
+  args: {
+    text: "Walt Walterson",
+    size: "default",
+  },
+  parameters: {
+    design: {
+      type: "figma",
+      url: "https://www.figma.com/file/Zt3YSeb6E6lebAffrNLa0h/Tailwind-Component-Library?node-id=1881%3A16994",
+    },
+  },
+} as Meta;
+
+const Template: Story<AvatarComponent> = (args: AvatarComponent) => ({
+  props: args,
+});
+
+export const Default = Template.bind({});
+Default.args = {
+  color: "#175ddc",
+};
+
+export const Large = Template.bind({});
+Large.args = {
+  ...Default.args,
+  size: "large",
+};
+
+export const Small = Template.bind({});
+Small.args = {
+  ...Default.args,
+  size: "small",
+};
+
+export const LightBackground = Template.bind({});
+LightBackground.args = {
+  color: "#d2ffcf",
+};
+
+export const Border = Template.bind({});
+Border.args = {
+  ...Default.args,
+  border: true,
+};
+
+export const ColorByID = Template.bind({});
+ColorByID.args = {
+  id: 236478,
+};
+
+export const ColorByText = Template.bind({});
+ColorByText.args = {
+  text: "Jason Doe",
+};

libs/components/src/avatar/index.ts

@@ -0,0 +1,2 @@
+export * from "./avatar.module";
+export * from "./avatar.component";