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Chat Application #143

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susritha-s Oct 8, 2022
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susritha-s Oct 8, 2022
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1 change: 1 addition & 0 deletions Chat Application/Readme.md
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Original file line number Diff line number Diff line change
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This is a frontend project for chat application
259 changes: 259 additions & 0 deletions Chat Application/components/active-chat.js
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class ActiveChat extends Component {

/**
* define attributes types
* @returns {Object}
*/
static get attrTypes() {
return {
id: {
type: "string",
observe: true
},
name: {
type: "string",
observe: true
},
avatar: {
type: "string",
observe: true
},
online: {
type: "boolean",
observe: true
},
};
}

/**
* generate observed attributes array from attr types object
*/
static get observedAttributes() {
return super.getObservedAttrs(ActiveChat.attrTypes);
}

/**
* generate tag-name from component class name
* @returns {string}
*/
static get tagName() {
return super.generateTagName(ActiveChat.name);
}

/**
* styles of component
* @returns {string}
*/
static get style() {
return (`<style>
:host {
--primaryColor: #3AD07A;
--hoverColor: #edfbf3;
display: flex;
justify-content: flex-start;
align-items: center;
padding: .75em;
position: relative;
}
:host([hidden]) {
display: none;
}
* {
box-sizing: border-box;
user-select: none;
}
.avatar-container {
flex: 0 0 2.5em;
width: 2.5em;
height: 2.5em;
border-radius: 50%;
display: flex;
justify-content: center;
align-items: center;
margin-right: 1em;
background: #efefef;
font-weight: bold;
font-size: 1em;
position: relative;
}
.avatar-container img {
max-width: 100%;
position: relative;
border-radius: 50%;
z-index: 1;
}
.avatar-container .char-avatar {
position: absolute;
z-index: 0;
}
.online-badge {
position: absolute;
right: 4px;
bottom: 0px;
width: 12px;
height: 12px;
background: var(--primaryColor);
display: inline-block;
border-radius: 50%;
border: 2px solid #fff;
visibility: hidden;
opacity: 0;
z-index: 2;
}
:host([online]) .online-badge {
visibility: visible;
opacity: 1;
}
#name {
flex: 0 1 100%;
position: relative;
margin: 0 0 .3em 0;
font-size: 1em;
font-weight: bold;
}
#more-btn {
background: transparent;
border: none;
outline: none;
cursor: pointer;
color: var(--primaryColor);
display: flex;
justify-content: center;
align-items: center;
width: 32px;
height: 28px;
border-radius: 5px;
margin: 0 .3em ;
}
#more-btn:hover {
background-color: #f2f2f2;
}
#back-btn {
background: transparent;
outline: none;
border: none;
margin-right: .5rem;
cursor: pointer;
color: var(--primaryColor);
border-radius: 4px;
height: 100%;
display: none;
}
#back-btn:hover {
background-color: var(--hoverColor);
}
@media screen and (max-width: 564px) {
#back-btn {
display: inline-block;
}
}
</style>`)
}

/**
* html template of component
* @returns {string}
*/
static get template() {
return (`
<template>
${ActiveChat.style}
<button id="back-btn">
<svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor"
stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<line x1="19" y1="12" x2="5" y2="12"></line>
<polyline points="12 19 5 12 12 5"></polyline>
</svg>
</button>
<div class="avatar-container">
<span class="online-badge"></span>
<img src="" id="avatar">
<span class="char-avatar"></span>
</div>
<div id="name"></div>
<div class="actions">
<button id="more-btn">
<svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor"
stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
<circle cx="12" cy="12" r="1"></circle>
<circle cx="12" cy="5" r="1"></circle>
<circle cx="12" cy="19" r="1"></circle>
</svg>
</button>
</div>
</template>
`)
}

constructor() {
super({
attrTypes: ActiveChat.attrTypes,
template: ActiveChat.template
});

this._backBtn = this.shadowRoot.getElementById("back-btn");

// render component
this.render();
}

// call on attributes changed
attributeChangedCallback(attrName, oldValue, newValue) {
if (oldValue === newValue)
return;

// re-render component
this.render();
}

onMount() {
this._backBtn.addEventListener("click", this._onBackBtnClicked.bind(this))
}

onUnmount() {
this._backBtn.removeEventListener("click", this._onBackBtnClicked.bind(this))
}

/**
* fires when back btn clicked
* @private
*/
_onBackBtnClicked(){
this.emit(APP_EVENTS.CHAT_BOX_BACK_CLICKED);
}

/**
* render component according to template and attributes
*/
render() {

// check the existence of avatar
// fetch first char of name to show if avatar not passed
if (!this.getAttribute("avatar")) {
// put first char of name when avatar not passed
const name = (this.getAttribute("name") || "").toUpperCase();
this.shadowRoot.querySelector(".char-avatar").innerText = name.substr(0, 1);
}

// loop over attributes and set all
for (let attr of this.attributes) {
const target = this.shadowRoot.getElementById(attr.name);
if (!target)
continue;

switch (attr.name) {
case "name":
target.innerText = attr.value;
break;
case "avatar":
target.src = attr.value;
break;
}

}
}

}

// define active-chat tag name
customElements.define(ActiveChat.tagName, ActiveChat);
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