Fin P3Ch7 - Bien comprendre setState

package-lock.json

@@ -4,6 +4,24 @@
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   "requires": true,
   "dependencies": {
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+      "integrity": "sha1-U4tm8+5izRq1HsMjgp0flIDHS+s=",
+      "requires": {
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@@ -51,17 +69,95 @@
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+      "resolved": "https://registry.npmjs.org/fbjs/-/fbjs-0.8.16.tgz",
+      "integrity": "sha1-XmdDL1UNxBtXK/VYR7ispk5TN9s=",
+      "requires": {
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+        "isomorphic-fetch": "2.2.1",
+        "loose-envify": "1.3.1",
+        "object-assign": "4.1.1",
+        "promise": "7.3.1",
+        "setimmediate": "1.0.5",
+        "ua-parser-js": "0.7.17"
+      }
+    },
+    "iconv-lite": {
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+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.19.tgz",
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+    },
+    "is-stream": {
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+      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
+      "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ="
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+      "integrity": "sha1-YRrhrPFPXoH3KVB0coGf6XM1WKk=",
+      "requires": {
+        "node-fetch": "1.7.3",
+        "whatwg-fetch": "2.0.3"
+      }
+    },
+    "js-tokens": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz",
+      "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls="
+    },
     "lodash.shuffle": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/lodash.shuffle/-/lodash.shuffle-4.2.0.tgz",
       "integrity": "sha1-FFtQU8+HX29cKjP0i26ZSMbse0s="
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+    "loose-envify": {
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+      "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.3.1.tgz",
+      "integrity": "sha1-0aitM/qc4OcT1l/dCsi3SNR4yEg=",
+      "requires": {
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+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.7.3.tgz",
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+      "requires": {
+        "encoding": "0.1.12",
+        "is-stream": "1.1.0"
+      }
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+    "object-assign": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
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       "dev": true
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+    "promise": {
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+      "resolved": "https://registry.npmjs.org/promise/-/promise-7.3.1.tgz",
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+      "requires": {
+        "asap": "2.0.6"
+      }
+    },
+    "prop-types": {
+      "version": "15.6.0",
+      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.6.0.tgz",
+      "integrity": "sha1-zq8IMCL8RrSjX2nhPvda7Q1jmFY=",
+      "requires": {
+        "fbjs": "0.8.16",
+        "loose-envify": "1.3.1",
+        "object-assign": "4.1.1"
+      }
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@@ -10319,6 +10415,21 @@
           }
         }
       }
+    },
+    "setimmediate": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.5.tgz",
+      "integrity": "sha1-KQy7Iy4waULX1+qbg3Mqt4VvgoU="
+    },
+    "ua-parser-js": {
+      "version": "0.7.17",
+      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.17.tgz",
+      "integrity": "sha512-uRdSdu1oA1rncCQL7sCj8vSyZkgtL7faaw9Tc9rZ3mGgraQ7+Pdx7w5mnOSF3gw9ZNG6oc+KXfkon3bKuROm0g=="
+    },
+    "whatwg-fetch": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-2.0.3.tgz",
+      "integrity": "sha1-nITsLc9oGH/wC8ZOEnS0QhduHIQ="
     }
   }
 }

package.json

@@ -4,6 +4,7 @@
   "private": true,
   "dependencies": {
     "lodash.shuffle": "^4.2.0",
+    "prop-types": "^15.6.0",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",
     "react-scripts": "1.0.14"

src/App.js

@@ -9,9 +9,15 @@ import HallOfFame, { FAKE_HOF } from './HallOfFame'
 
 const SIDE = 6
 const SYMBOLS = '😀🎉💖🎩🐶🐱🦄🐬🌍🌛🌞💫🍎🍌🍓🍐🍟🍿'
+const VISUAL_PAUSE_MSECS = 750
 
 class App extends Component {
-  cards = this.generateCards()
+  state = {
+    cards: this.generateCards(),
+    currentPair: [],
+    guesses: 0,
+    matchedCardIndices: [],
+  }
 
   generateCards() {
     const result = []
@@ -24,19 +30,61 @@ class App extends Component {
     return shuffle(result)
   }
 
-  handleCardClick(card) {
-    console.log(card, 'clicked')
+  getFeedbackForCard(index) {
+    const { currentPair, matchedCardIndices } = this.state
+    const indexMatched = matchedCardIndices.includes(index)
+
+    if (currentPair.length < 2) {
+      return indexMatched || index === currentPair[0] ? 'visible' : 'hidden'
+    }
+
+    if (currentPair.includes(index)) {
+      return indexMatched ? 'justMatched' : 'justMismatched'
+    }
+
+    return indexMatched ? 'visible' : 'hidden'
+  }
+
+  // Arrow fx for binding
+  handleCardClick = index => {
+    const { currentPair } = this.state
+
+    if (currentPair.length === 2) {
+      return
+    }
+
+    if (currentPair.length === 0) {
+      this.setState({ currentPair: [index] })
+      return
+    }
+
+    this.handleNewPairClosedBy(index)
+  }
+
+  handleNewPairClosedBy(index) {
+    const { cards, currentPair, guesses, matchedCardIndices } = this.state
+
+    const newPair = [currentPair[0], index]
+    const newGuesses = guesses + 1
+    const matched = cards[newPair[0]] === cards[newPair[1]]
+    this.setState({ currentPair: newPair, guesses: newGuesses })
+    if (matched) {
+      this.setState({ matchedCardIndices: [...matchedCardIndices, ...newPair] })
+    }
+    setTimeout(() => this.setState({ currentPair: [] }), VISUAL_PAUSE_MSECS)
   }
 
   render() {
-    const won = new Date().getSeconds() % 2 === 0
+    const { cards, guesses, matchedCardIndices } = this.state
+    const won = matchedCardIndices.length === cards.length
     return (
       <div className="memory">
-        <GuessCount guesses={0} />
-        {this.cards.map((card, index) => (
+        <GuessCount guesses={guesses} />
+        {cards.map((card, index) => (
           <Card
             card={card}
-            feedback="visible"
+            feedback={this.getFeedbackForCard(index)}
+            index={index}
             key={index}
             onClick={this.handleCardClick}
           />

src/Card.js

@@ -1,15 +1,28 @@
+import PropTypes from 'prop-types'
 import React from 'react'
 
 import './Card.css'
 
 const HIDDEN_SYMBOL = '❓'
 
-const Card = ({ card, feedback, onClick }) => (
-  <div className={`card ${feedback}`} onClick={() => onClick(card)}>
+const Card = ({ card, feedback, index, onClick }) => (
+  <div className={`card ${feedback}`} onClick={() => onClick(index)}>
     <span className="symbol">
       {feedback === 'hidden' ? HIDDEN_SYMBOL : card}
     </span>
   </div>
 )
 
+Card.propTypes = {
+  card: PropTypes.string.isRequired,
+  feedback: PropTypes.oneOf([
+    'hidden',
+    'justMatched',
+    'justMismatched',
+    'visible',
+  ]).isRequired,
+  index: PropTypes.number.isRequired,
+  onClick: PropTypes.func.isRequired,
+}
+
 export default Card

src/GuessCount.js

@@ -1,7 +1,12 @@
+import PropTypes from 'prop-types'
 import React from 'react'
 
 import './GuessCount.css'
 
 const GuessCount = ({ guesses }) => <div className="guesses">{guesses}</div>
 
+GuessCount.propTypes = {
+  guesses: PropTypes.number.isRequired,
+}
+
 export default GuessCount

src/HallOfFame.js

@@ -1,3 +1,4 @@
+import PropTypes from 'prop-types'
 import React from 'react'
 
 import './HallOfFame.css'
@@ -16,6 +17,17 @@ const HallOfFame = ({ entries }) => (
   </table>
 )
 
+HallOfFame.propTypes = {
+  entries: PropTypes.arrayOf(
+    PropTypes.shape({
+      date: PropTypes.string.isRequired,
+      guesses: PropTypes.number.isRequired,
+      id: PropTypes.number.isRequired,
+      player: PropTypes.string.isRequired,
+    })
+  ).isRequired,
+}
+
 export default HallOfFame
 
 // == Internal helpers ==============================================