New App: tinyCMC coinmarketcap client

apps/tinycmc/ChangeLog

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+0.01: New App
+0.02: Set API Key through Apploader

apps/tinycmc/README.md

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+# Tiny Coinmarketcap
+A simple app using Gadgedtbridge internet access to fetch current crypto prices from Coinmarketcap.
+I'm providing a "free-tier" API Key.
+
+TO-DOs:
+- [X] Add own API Key option
+- [ ] Add settings for Currency conversion

apps/tinycmc/app-icon.js

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+require("heatshrink").decompress(atob("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"))

apps/tinycmc/app.js

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+let settings = require("Storage").readJSON("tinycmc.json", 1);
+const apiKey = settings.apikey || null;
+const cmcBase = 'https://pro-api.coinmarketcap.com/';
+const version = ['v1', 'v2'];
+const path = {
+  latest: '/cryptocurrency/listings/latest',
+  quote: '/cryptocurrency/quotes/latest'
+};
+let page = 0;
+function displayLatest(offset) {
+  g.clear();
+  if (page === 0) {
+    E.showMessage('Getting Top 10');
+  } else {
+    E.showMessage(`Getting Top ${offset} to ${offset + 9}`);
+  }
+
+  const uri = offset ? `${cmcBase}${version[0]}${path.latest}?convert=EUR&limit=10&start=${offset}` : `${cmcBase}${version[0]}${path.latest}?convert=EUR&limit=10`;
+  Bangle.http(uri,
+    {
+      method: 'GET',
+      headers: {
+        "X-CMC_PRO_API_KEY": apiKey,
+      }
+    }).then(data=>{
+      const result = JSON.parse(data.resp).data;
+    let menu = {
+    "" : { title : "-- Select --" },
+  };
+    //FIXME: Menu can also take an array of items, this would be easier to compose using map
+    result.forEach(listing => {
+      menu[listing.name] = {
+        title: `${listing.cmc_rank}: ${listing.symbol} ${Number(listing.quote.EUR.percent_change_24h).toFixed(3)}`,
+        onchange: function() { E.showMenu(); displayQuote(listing.symbol);} };
+    });
+    menu.Next = function() {
+      E.showMenu();
+      g.clear();
+      page = page + 1;
+      displayLatest((page * 10) + 1);
+    }; // remove the menu
+    menu.Exit = function() {
+      E.showMenu();
+      g.clear();
+      Bangle.showClock();
+    }; // remove the menu
+  g.clear();
+    E.showMenu(menu);
+  setWatch(() => {
+    g.clear();
+    displayMenu();
+  }, BTN, {edge:"rising", debounce:50, repeat:true});
+}).catch(error=>{
+  console.log('Error');
+  console.log(error);
+  E.showMessage(`${error}\nTo go back press BTN`);
+  setWatch(() => {
+    g.clear();
+    displayMenu();
+    }, BTN, {edge:"rising", debounce:50, repeat:true});
+  });
+}
+
+function displayQuote(symb) {
+  g.clear();
+  E.showMessage(`Getting latest for ${symb}`);
+  Bangle.http(`${cmcBase}${version[1]}${path.quote}?symbol=${symb}&convert=EUR`,
+    {
+      method: 'GET',
+      headers: {
+        "X-CMC_PRO_API_KEY": apiKey,
+      }
+    }).then(data=>{
+    g.clear();
+      const result = JSON.parse(data.resp).data[symb][0];
+  E.showMessage(`#${result.cmc_rank}: ${result.symbol}\n${Number(result.quote.EUR.price).toFixed(2)}\n%24h:
+${result.quote.EUR.percent_change_24h}`);
+  setWatch(() => {
+    g.clear();
+    displayMenu();
+  }, BTN, {edge:"rising", debounce:50, repeat:true});
+}).catch(error=>{
+  E.showMessage(`${error}\nTo go back press BTN`);
+  setWatch(() => {
+    g.clear();
+    displayMenu();
+    }, BTN, {edge:"rising", debounce:50, repeat:true});
+  });
+}
+
+function displayMenu() {
+  if (!apiKey) {
+    E.showMessage("Please provide a Coinmarketcap API Key");
+  } else {
+    // Actually display the menu
+    E.showMenu({
+      "" : { title : "-- Select --" }, // options
+      "Latest": function() { E.showMenu(); displayLatest(); },
+      "BTC" : function() { E.showMenu(); displayQuote('BTC'); },
+      "ETH" : function() { E.showMenu(); displayQuote('ETH'); },
+      "XMR" : function() { E.showMenu(); displayQuote('XMR'); },
+      "ADA" : function() { E.showMenu(); displayQuote('ADA'); },
+      "DOGE" : function() { E.showMenu(); displayQuote('DOGE'); },
+      "LTC" : function() { E.showMenu(); displayQuote('LTC'); },
+      "Exit" : function() {
+        E.showMenu();
+        g.clear();
+        Bangle.showClock();
+      }, // remove the menu
+    });
+  }
+}
+
+function main () {
+  displayMenu();
+}
+
+main ();

apps/tinycmc/interface.html

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+<html>
+  <head>
+    <link rel="stylesheet" href="../../css/spectre.min.css">
+  </head>
+  <body>   
+    <h3>Set Coinmarketcap API key</h3>
+    <p><input id="apikey" onkeyup="checkInput()"  style="width:90%; margin: 3px"></input><button id="upload" class="btn btn-primary">Save key</button></p>
+    
+    <h4>Where to get your personal API key?</h4>
+    <p>Go to <a href="https://coinmarketcap.com/api/">https://coinmarketcap.com/api/</a> and sign up for a free account.<br>
+    After registration you can login and obtain your personal API key.</p>
+    
+
+    <script src="../../core/lib/interface.js"></script>
+
+    <script>
+    
+       function checkInput() {
+        if(document.getElementById("apikey").value==="") { 
+                document.getElementById('upload').disabled = true; 
+            } else { 
+                document.getElementById('upload').disabled = false;
+            }
+        }
+        checkInput();
+    
+        var settings = {};
+        function onInit(){
+          console.log("Loading settings from BangleJs...");
+          try {
+            Util.readStorage("tinycmc.json", data=>{
+              if(data.length > 0){
+                settings = JSON.parse(data);
+                console.log("Got settings", settings);
+                document.getElementById("apikey").value = settings.apikey;
+                console.log("Loaded apikey from BangleJs.");
+                checkInput();
+              }
+            });
+          } catch(ex) {
+              console.log("(Warning) Could not load apikey from BangleJs.");
+              console.log(ex);
+          }
+        
+        }
+        
+        document.getElementById("upload").addEventListener("click", function() {
+            try {
+              settings.apikey = document.getElementById("apikey").value;
+              Util.showModal("Saving...");
+              Util.writeStorage("tinycmc.json", JSON.stringify(settings), ()=>{
+                Util.hideModal();
+              });
+              console.log("Sent settings!");
+            } catch(ex) {
+                console.log("(Warning) Could not write settings to BangleJs.");
+                console.log(ex);
+            }
+        });
+
+    </script>
+  </body>
+</html>

apps/tinycmc/metadata.json

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+{
+  "id": "tinycmc",
+  "name": "Tiny CMC",
+  "shortName":"tinycmc",
+  "icon": "icon.png",
+  "version": "0.02",
+  "description": "TinyCMC is a bangle.js Coinmarketcap API client",
+  "type": "app",
+  "tags": "tools",
+  "supports": [
+    "BANGLEJS2"
+  ],
+  "allow_emulator": false,
+  "interface": "interface.html",
+  "readme": "README.md",
+  "data": [
+    {"name":"tinycmc.json"}
+  ],
+  "storage": [
+    {
+      "name": "tinycmc.app.js",
+      "url": "app.js"
+    },
+    {
+      "name": "tinycmc.img",
+      "url": "app-icon.js",
+      "evaluate": true
+    }
+  ]
+}