From 63533956af470170b59e2223515e356d72ee6aed Mon Sep 17 00:00:00 2001
From: Taylor Dawson <taylorjdawson@gmail.com>
Date: Wed, 26 Feb 2020 14:33:34 -0800
Subject: [PATCH] Add linting & more code refactoring - Remove getNetwork
 method as it was redundant - Add tslint rules for import destructure
 whitespacing - Remove name as it was redundant (was the same as trait_type) -
 Add error state for asset not found - Update name of compiled js - Split out
 template render code for readability - Remove forbidden non null assertions

---
 example/index.html    | 28 ++++++------
 src/loader.ts         |  3 +-
 src/nft-card-back.ts  | 25 +++++------
 src/nft-card-front.ts | 24 ++++++-----
 src/nft-card.ts       | 99 ++++++++++++++++++++++++++-----------------
 src/pill.ts           |  7 ---
 tslint.json           |  1 +
 webpack.config.js     |  2 +-
 webpack.dev.config.js |  2 +-
 9 files changed, 105 insertions(+), 86 deletions(-)

diff --git a/example/index.html b/example/index.html
index 787a93c..cb238e2 100644
--- a/example/index.html
+++ b/example/index.html
@@ -7,7 +7,7 @@
     <script src="/node_modules/@webcomponents/webcomponentsjs/custom-elements-es5-adapter.js"></script>
     <script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-bundle.js"></script>
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.8.0/css/bulma.min.css">
-    <script defer src="/dist/opensea-nft-card.min.js"></script>
+    <script defer src="/dist/nft-card.min.js"></script>
 
     <title>OpenSea Embeddable NFT example</title>
     <style media="screen">
@@ -49,22 +49,22 @@ <h3>Show users any crypto collectible and let them buy it straight from your sit
 <!--    >-->
 <!--    </nft-card>-->
 
-    <nft-card
-            contractAddress="0x2fb5d7dda4f1f20f974a0fdd547c38674e8d940c"
-            tokenId="20014"
-    >
-    </nft-card>
+<!--    <nft-card-->
+<!--            contractAddress="0x2fb5d7dda4f1f20f974a0fdd547c38674e8d940c"-->
+<!--            tokenId="20014"-->
+<!--    >-->
+<!--    </nft-card>-->
 
     <div style="padding-top: 5vh;"></div>
 
-<!--    <nft-card-->
-<!--            contractAddress="0x5caebd3b32e210e85ce3e9d51638b9c445481567"-->
-<!--            height="250px"-->
-<!--            horizontal-->
-<!--            network="mainnet"-->
-<!--            tokenId="2242579050293992223"-->
-<!--            width="100%"-->
-<!--    >-->
+    <nft-card
+            contractAddress="0x5caebd3b32e210e85ce3e9d51638b9c445481567"
+            height="250px"
+            horizontal
+            network="main"
+            tokenId="2242579050293992223"
+            width="100%"
+    >
     </nft-card>
     <div style="padding-top: 5vh;"></div>
 </div>
diff --git a/src/loader.ts b/src/loader.ts
index 67f7353..6fd98cb 100644
--- a/src/loader.ts
+++ b/src/loader.ts
@@ -1,5 +1,4 @@
-import {css, customElement, html, LitElement} from 'lit-element'
-
+import { css, customElement, html, LitElement } from 'lit-element'
 
 @customElement('loader-element')
 export class Loader extends LitElement {
diff --git a/src/nft-card-back.ts b/src/nft-card-back.ts
index e451311..7b5e841 100644
--- a/src/nft-card-back.ts
+++ b/src/nft-card-back.ts
@@ -1,7 +1,7 @@
 import { LitElement, html, customElement, property, css } from 'lit-element'
 import { styleMap } from 'lit-html/directives/style-map'
 import { classMap } from 'lit-html/directives/class-map'
-import {OpenSeaTraitStats} from 'opensea-js/lib/types'
+import { OpenSeaTraitStats } from 'opensea-js/lib/types'
 
 enum TraitType {
   Property = 'prop',
@@ -19,7 +19,6 @@ interface Traits {
 }
 
 interface Trait {
-  name: string
   value: string | number
   max?: string | number
   display_type: string
@@ -235,9 +234,12 @@ export class NftCardBackTemplate extends LitElement {
         await this.requestUpdate()
       }
     })
-    const el: HTMLElement = this.shadowRoot!.firstElementChild as HTMLElement
-    this.cardHeight = el.offsetHeight
-    this.cardWidth = el.offsetWidth
+
+    if (this.shadowRoot) {
+      const el: HTMLElement = this.shadowRoot.firstElementChild as HTMLElement
+      this.cardHeight = el.offsetHeight
+      this.cardWidth = el.offsetWidth
+    }
   }
 
   public getBoostsTemplate(boosts: any[]) {
@@ -302,7 +304,7 @@ export class NftCardBackTemplate extends LitElement {
             <div class="stat">
               <div class="stat-value">${stat.value}</div>
               <div class="stat-name">
-                ${NftCardBackTemplate.formatTrait(stat.name)}
+                ${NftCardBackTemplate.formatTrait(stat.trait_type)}
               </div>
             </div>
           `
@@ -333,18 +335,18 @@ export class NftCardBackTemplate extends LitElement {
         <p class="attribute-title">Rankings</p>
       </div>
       ${rankings.slice(0, numRanksRender).map(
-        ({name, value, max}) => html`
+        ({trait_type, value, max}) => html`
           <div class="trait_ranking" style="${styleMap(rankStyle)}">
             <div class="trait_ranking-header">
               <div class="trait_ranking-header-name">
-                ${NftCardBackTemplate.formatTrait(name)}
+                ${NftCardBackTemplate.formatTrait(trait_type)}
               </div>
               <div class="trait_ranking-header-value">${value} of ${max}</div>
             </div>
             <div class="trait_ranking-bar">
               <div
                 class="trait_ranking-bar-fill"
-                style=${styleMap({width: `${(+value / +max!) * 100}%`})}
+                style=${styleMap({width: `${(+value / +(max || 1 /* If no max then just render full bar */)) * 100}%`})}
               ></div>
             </div>
           </div>
@@ -362,7 +364,7 @@ export class NftCardBackTemplate extends LitElement {
     for (let i = 0; i < props.length && i < DISPLAY_MAX; i++) {
       propsTemplate.push(html`
         <div class="trait_property">
-          <p class="trait_property-type">${NftCardBackTemplate.formatTrait(props[i].name)}</p>
+          <p class="trait_property-type">${NftCardBackTemplate.formatTrait(props[i].trait_type)}</p>
           <p class="trait_property-value">${props[i].value}</p>
         </div>
       `)
@@ -431,10 +433,9 @@ export class NftCardBackTemplate extends LitElement {
       const name = trait.trait_type
 
       this.traits[type + 's'].push({
-        name,
         value: trait.value,
         ...(type === TraitType.Ranking ? { max: collectionTraits[name].max as unknown as number } : {}),
-        trait_type: '',
+        trait_type: trait.trait_type,
         display_type: ''
       })
     }
diff --git a/src/nft-card-front.ts b/src/nft-card-front.ts
index 9752aae..07eaac6 100644
--- a/src/nft-card-front.ts
+++ b/src/nft-card-front.ts
@@ -11,10 +11,10 @@ import {
   TemplateResult
 } from 'lit-element'
 
-import {classMap} from 'lit-html/directives/class-map'
-import {styleMap} from 'lit-html/directives/style-map'
+import { classMap } from 'lit-html/directives/class-map'
+import { styleMap } from 'lit-html/directives/style-map'
 
-import {OpenSeaAsset, OpenSeaFungibleToken, Order, Network} from 'opensea-js/lib/types'
+import { OpenSeaAsset, OpenSeaFungibleToken, Order, Network } from 'opensea-js/lib/types'
 
 enum ButtonType {
   Manage = 'manage',
@@ -24,7 +24,7 @@ enum ButtonType {
   Unlock = 'unlock'
 }
 
-const BTN_TEXT: {[index: string]: string} = {
+const BTN_TEXT: { [index: string]: string } = {
   [ButtonType.Manage]: 'manage this item ❯',
   [ButtonType.Buy]: 'buy this item ❯',
   [ButtonType.View]: 'view on openSea ❯',
@@ -162,7 +162,7 @@ export class NftCardFrontTemplate extends LitElement {
       }
     `
   }
-  @property({type: Object}) public asset!: OpenSeaAsset
+  @property({type: Object}) public asset?: OpenSeaAsset
   @property({type: Boolean}) public isOwnedByAccount!: boolean
   @property({type: String}) public account!: string
   @property({type: Boolean}) public horizontal!: boolean
@@ -182,10 +182,11 @@ export class NftCardFrontTemplate extends LitElement {
 
         // Check for a sell order to populate the UI with the sell information
         // TODO: We will be using lastSale here once added to SDK
-        if (this.asset.sellOrders!.length > 0) {
-          const order: Order = this.asset.sellOrders![0]
+        if (this.asset && this.asset.sellOrders && this.asset.sellOrders.length > 0) {
+          const order: Order = this.asset.sellOrders[0]
           const paymentToken = order.paymentTokenContract
-          const currentPrice = +order.currentPrice!.toFixed() / Math.pow(10, paymentToken!.decimals)
+          const decimals = paymentToken ? paymentToken.decimals : 18 // Default decimals to 18
+          const currentPrice = order.currentPrice ? +order.currentPrice.toFixed() / Math.pow(10, decimals) : 0
           const expires = new Date(order.expirationTime.toFixed())
 
           this.lastSaleData = {
@@ -215,12 +216,12 @@ export class NftCardFrontTemplate extends LitElement {
     let prevPriceTemplate: TemplateResult = html``
     let currentPriceTemplate: TemplateResult = html``
 
-    if (this.lastSaleData) {
-      const currentPriceSymbol = this.lastSaleData.paymentToken!.symbol === 'ETH' ? 'Ξ ' : ''
+    if (this.lastSaleData && this.lastSaleData.paymentToken) {
+      const currentPriceSymbol = this.lastSaleData.paymentToken.symbol === 'ETH' ? 'Ξ ' : ''
       currentPriceTemplate = html`<div class="asset-detail-price-current">${currentPriceSymbol} ${this.lastSaleData.currentPrice}</div>`
     }
 
-    if (this.asset.lastSale) {
+    if (this.asset && this.asset.lastSale) {
       // @ts-ignore ignore until LastSale type gets added to SDK
       const formattedPrevPrice = this.asset.lastSale.total_price / Math.pow(10, this.asset.lastSale.payment_token.decimals)
       // @ts-ignore ignore until LastSale type gets added to SDK
@@ -240,6 +241,7 @@ export class NftCardFrontTemplate extends LitElement {
    * Implement `render` to define a template for your element.
    */
   public render() {
+    if (!this.asset) { return undefined } // If there is no asset then we can't render
     return html`
       <div class="card-front ${classMap({'is-vertical': !this.horizontal})}">
         <div class="asset-action-info">
diff --git a/src/nft-card.ts b/src/nft-card.ts
index bef3907..d195889 100644
--- a/src/nft-card.ts
+++ b/src/nft-card.ts
@@ -66,6 +66,18 @@ export class NftCard extends LitElement {
       .flipped-card .card-inner {
         transform: rotateY(180deg);
       }
+      .card .error {
+        height: 100%;
+        display: flex;
+        flex-flow: column;
+        justify-content: center;
+      }
+      .card .error-moji {
+        font-size: 50px;
+      }
+      .card .error-message {
+        font-size: 16px;
+      }
     `
     }
 
@@ -86,6 +98,7 @@ export class NftCard extends LitElement {
 
     // Card state variables
     @property({type: Boolean}) private loading = true
+    @property({type: Boolean}) private error = false
     @property({type: Boolean}) private isOwnedByAccount = false
     @property({type: Boolean}) private isUnlocked: boolean = false
     @property({type: Boolean}) private hasWeb3: boolean = false
@@ -113,16 +126,21 @@ export class NftCard extends LitElement {
         // Get the web3 provider
         this.provider = NftCard.getProvider()
 
-        this.seaport = new OpenSeaPort(this.provider, {networkName: this.getNetwork()})
+        this.seaport = new OpenSeaPort(this.provider, {networkName: this.network})
 
-        this.asset = await this.seaport.api.getAsset(this.contractAddress, this.tokenId)
+        try {
+            this.asset = await this.seaport.api.getAsset(this.contractAddress, this.tokenId)
+            this.traitData = {
+                traits: this.asset.traits,
+                collectionTraits: this.asset.collection.traitStats
+            }
 
-        this.traitData = {
-            traits: this.asset.traits,
-            collectionTraits: this.asset.collection.traitStats
+        } catch (e) {
+            this.error = true
+            // Probably could not find the asset
+            console.error(e)
         }
 
-        // We got the data so we are done loading
         this.loading = false
 
         // Tell the component to update with new state
@@ -146,6 +164,40 @@ export class NftCard extends LitElement {
         }
     }
 
+    public renderErrorTemplate() {
+        return html`
+                <div class="error">
+                    <div class="error-moji">¯\\_(ツ)_/¯</div>
+                    <div class="error-message">Problem loading asset.</div>
+                </div>`
+    }
+
+    public renderLoaderTemplate() {
+        return html`<loader-element></loader-element>`
+    }
+
+    public renderInnerCardTemplate() {
+        return html`
+            <nft-card-front
+              .horizontal=${this.horizontal}
+              @button-event="${this.eventHandler}"
+              .asset=${this.asset}
+              .state=${({
+            isOwnedByAccount: this.isOwnedByAccount,
+            isMatchingNetwork: this.isMatchingNetwork,
+            isUnlocked: this.isUnlocked,
+            hasWeb3: this.hasWeb3,
+            network: this.network
+        })}
+              .account=${this.account}
+            ></nft-card-front>
+            <nft-card-back
+              .horizontal=${this.horizontal}
+              .traitData=${this.traitData}
+            ></nft-card-back>
+            `
+    }
+
     /**
      * Implement `render` to define a template for your element.
      */
@@ -164,28 +216,9 @@ export class NftCard extends LitElement {
          style=${styleMap({width: this.width, height: this.height})}
        >
        <div class="card-inner">
-          ${this.loading ?
-            html`<loader-element></loader-element>`
-            :
-            html`
-            <nft-card-front
-              .horizontal=${this.horizontal}
-              @button-event="${this.eventHandler}"
-              .asset=${this.asset}
-              .state=${({
-                isOwnedByAccount: this.isOwnedByAccount,
-                isMatchingNetwork: this.isMatchingNetwork,
-                isUnlocked: this.isUnlocked,
-                hasWeb3: this.hasWeb3,
-                network: this.network
-               })}
-              .account=${this.account}
-            ></nft-card-front>
-            <nft-card-back
-              .horizontal=${this.horizontal}
-              .traitData=${this.traitData}
-            ></nft-card-back>
-            `
+          ${this.loading ? this.renderLoaderTemplate() :
+            this.error ? this.renderErrorTemplate() :
+            this.renderInnerCardTemplate()
         }
        </div>
      `
@@ -218,16 +251,6 @@ export class NftCard extends LitElement {
         window.open(this.asset.openseaLink, '_blank')
     }
 
-    private getNetwork() {
-        switch (this.network) {
-            case 'main':
-                return Network.Main
-            case 'rinkeby':
-                return Network.Rinkeby
-            default: return Network.Main
-        }
-    }
-
     /**
      * async connectWallet - Initializes connection to the injected web3 account
      * Pre-Conditions: this.provider has been defined - this method should only
diff --git a/src/pill.ts b/src/pill.ts
index 0cdb8e2..46c0789 100644
--- a/src/pill.ts
+++ b/src/pill.ts
@@ -1,7 +1,3 @@
-/**
- * Import LitElement base class, html helper function,
- * and TypeScript decorators
- **/
 import { LitElement, html, customElement, property, css } from 'lit-element'
 
 import { styleMap } from 'lit-html/directives/style-map'
@@ -26,9 +22,6 @@ export class PillTemplate extends LitElement {
     border: this.border
   }
 
-  // @TODO: Add dynamic styles using styleMap directive
-  // @TODO: Add dynamic style text color
-  // @TODO: Add dynamic style border & border color
   static get styles() {
     return css`
       .pill {
diff --git a/tslint.json b/tslint.json
index 6bc83e1..7537b09 100644
--- a/tslint.json
+++ b/tslint.json
@@ -80,6 +80,7 @@
             true,
             "check-branch",
             "check-decl",
+            "check-module",
             "check-operator",
             "check-separator",
             "check-rest-spread",
diff --git a/webpack.config.js b/webpack.config.js
index 4087bfc..bbcdef3 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -5,7 +5,7 @@ module.exports = {
   devtool: 'source-map',
   entry: './src/nft-card.ts',
   output: {
-    filename: 'opensea-nft-card.min.js',
+    filename: 'nft-card.min.js',
     path: path.resolve(__dirname, 'dist'),
     publicPath: '/'
   },
diff --git a/webpack.dev.config.js b/webpack.dev.config.js
index 4ff589c..12862aa 100644
--- a/webpack.dev.config.js
+++ b/webpack.dev.config.js
@@ -11,7 +11,7 @@ module.exports = {
   },
   entry: './src/nft-card.ts',
   output: {
-    filename: 'opensea-nft-card.min.js',
+    filename: 'nft-card.min.js',
     path: path.resolve(__dirname, 'dist'),
     publicPath: '/'
   },