From 93519df5517bef79c70fe91870179f28602088bd Mon Sep 17 00:00:00 2001
From: Bernt Popp <bernt.popp@gmail.com>
Date: Thu, 30 Nov 2023 17:43:29 +0100
Subject: [PATCH] Add download data as Excel file, closes #24

---
 package-lock.json | 162 +++++++++++++++++++++++++++++++++++++++++++++-
 package.json      |   5 +-
 src/App.vue       |  28 +++++++-
 3 files changed, 189 insertions(+), 6 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 3ae0c54..5636fa8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,16 +1,17 @@
 {
   "name": "pld-progression-grouper-app",
-  "version": "0.2.0",
+  "version": "0.4.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "pld-progression-grouper-app",
-      "version": "0.2.0",
+      "version": "0.4.0",
       "dependencies": {
         "chart.js": "^4.4.0",
         "core-js": "^3.8.3",
-        "vue": "^3.2.13"
+        "vue": "^3.2.13",
+        "xlsx": "^0.18.5"
       },
       "devDependencies": {
         "@babel/core": "^7.12.16",
@@ -3357,6 +3358,14 @@
         "node": ">= 10.0.0"
       }
     },
+    "node_modules/adler-32": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/adler-32/-/adler-32-1.3.1.tgz",
+      "integrity": "sha512-ynZ4w/nUUv5rrsR8UUGoe1VC9hZj6V5hU9Qw1HlMDJGEJw5S7TfTErWTjMys6M7vr0YWcPqs3qAr4ss0nDfP+A==",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/ajv": {
       "version": "6.12.6",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
@@ -3992,6 +4001,18 @@
         "node": ">=4"
       }
     },
+    "node_modules/cfb": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/cfb/-/cfb-1.2.2.tgz",
+      "integrity": "sha512-KfdUZsSOw19/ObEWasvBP/Ac4reZvAGauZhs6S/gqNhXhI7cKwvlH7ulj+dOEYnca4bm4SGo8C1bTAQvnTjgQA==",
+      "dependencies": {
+        "adler-32": "~1.3.0",
+        "crc-32": "~1.2.0"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -4258,6 +4279,14 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/codepage": {
+      "version": "1.15.0",
+      "resolved": "https://registry.npmjs.org/codepage/-/codepage-1.15.0.tgz",
+      "integrity": "sha512-3g6NUTPd/YtuuGrhMnOMRjFc+LJw/bnMp3+0r/Wcz3IXUuCosKRJvMphm5+Q+bvTVGcJJuRvVLuYba+WojaFaA==",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/color-convert": {
       "version": "1.9.3",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
@@ -4508,6 +4537,17 @@
         "node": ">=10"
       }
     },
+    "node_modules/crc-32": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/crc-32/-/crc-32-1.2.2.tgz",
+      "integrity": "sha512-ROmzCKrTnOwybPcJApAA6WBWij23HVfGVNKqqrZpuyZOHqK2CwHSvpGuyt/UNNvaIjEd8X5IFGp4Mh+Ie1IHJQ==",
+      "bin": {
+        "crc32": "bin/crc32.njs"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "6.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -6331,6 +6371,14 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/frac": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/frac/-/frac-1.1.2.tgz",
+      "integrity": "sha512-w/XBfkibaTl3YDqASwfDUqkna4Z2p9cFSr1aHDt0WoMTECnRfBOv2WArlZILlqgWlmdIlALXGpM2AOhEk5W3IA==",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/fraction.js": {
       "version": "4.3.7",
       "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-4.3.7.tgz",
@@ -10183,6 +10231,17 @@
       "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
       "dev": true
     },
+    "node_modules/ssf": {
+      "version": "0.11.2",
+      "resolved": "https://registry.npmjs.org/ssf/-/ssf-0.11.2.tgz",
+      "integrity": "sha512-+idbmIXoYET47hH+d7dfm2epdOMUDjqcB4648sTZ+t2JwoyBFL/insLfB/racrDmsKB3diwsDA696pZMieAC5g==",
+      "dependencies": {
+        "frac": "~1.1.2"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/ssri": {
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",
@@ -11530,6 +11589,22 @@
       "integrity": "sha512-CC1bOL87PIWSBhDcTrdeLo6eGT7mCFtrg0uIJtqJUFyK+eJnzl8A1niH56uu7KMa5XFrtiV+AQuHO3n7DsHnLQ==",
       "dev": true
     },
+    "node_modules/wmf": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wmf/-/wmf-1.0.2.tgz",
+      "integrity": "sha512-/p9K7bEh0Dj6WbXg4JG0xvLQmIadrner1bi45VMJTfnbVHsc7yIajZyoSoK60/dtVBs12Fm6WkUI5/3WAVsNMw==",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
+    "node_modules/word": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/word/-/word-0.3.0.tgz",
+      "integrity": "sha512-OELeY0Q61OXpdUfTp+oweA/vtLVg5VDOXh+3he3PNzLGG/y0oylSOC1xRVj0+l4vQ3tj/bB1HVHv1ocXkQceFA==",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/wrap-ansi": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
@@ -11607,6 +11682,26 @@
         }
       }
     },
+    "node_modules/xlsx": {
+      "version": "0.18.5",
+      "resolved": "https://registry.npmjs.org/xlsx/-/xlsx-0.18.5.tgz",
+      "integrity": "sha512-dmg3LCjBPHZnQp5/F/+nnTa+miPJxUXB6vtk42YjBBKayDNagxGEeIdWApkYPOf3Z3pm3k62Knjzp7lMeTEtFQ==",
+      "dependencies": {
+        "adler-32": "~1.3.0",
+        "cfb": "~1.2.1",
+        "codepage": "~1.15.0",
+        "crc-32": "~1.2.1",
+        "ssf": "~0.11.2",
+        "wmf": "~1.0.1",
+        "word": "~0.3.0"
+      },
+      "bin": {
+        "xlsx": "bin/xlsx.njs"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
@@ -14265,6 +14360,11 @@
       "integrity": "sha512-4B/qKCfeE/ODUaAUpSwfzazo5x29WD4r3vXiWsB7I2mSDAihwEqKO+g8GELZUQSSAo5e1XTYh3ZVfLyxBc12nA==",
       "dev": true
     },
+    "adler-32": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/adler-32/-/adler-32-1.3.1.tgz",
+      "integrity": "sha512-ynZ4w/nUUv5rrsR8UUGoe1VC9hZj6V5hU9Qw1HlMDJGEJw5S7TfTErWTjMys6M7vr0YWcPqs3qAr4ss0nDfP+A=="
+    },
     "ajv": {
       "version": "6.12.6",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
@@ -14706,6 +14806,15 @@
       "integrity": "sha512-roIFONhcxog0JSSWbvVAh3OocukmSgpqOH6YpMkCvav/ySIV3JKg4Dc8vYtQjYi/UxpNE36r/9v+VqTQqgkYmw==",
       "dev": true
     },
+    "cfb": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/cfb/-/cfb-1.2.2.tgz",
+      "integrity": "sha512-KfdUZsSOw19/ObEWasvBP/Ac4reZvAGauZhs6S/gqNhXhI7cKwvlH7ulj+dOEYnca4bm4SGo8C1bTAQvnTjgQA==",
+      "requires": {
+        "adler-32": "~1.3.0",
+        "crc-32": "~1.2.0"
+      }
+    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -14903,6 +15012,11 @@
         }
       }
     },
+    "codepage": {
+      "version": "1.15.0",
+      "resolved": "https://registry.npmjs.org/codepage/-/codepage-1.15.0.tgz",
+      "integrity": "sha512-3g6NUTPd/YtuuGrhMnOMRjFc+LJw/bnMp3+0r/Wcz3IXUuCosKRJvMphm5+Q+bvTVGcJJuRvVLuYba+WojaFaA=="
+    },
     "color-convert": {
       "version": "1.9.3",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
@@ -15103,6 +15217,11 @@
         "yaml": "^1.10.0"
       }
     },
+    "crc-32": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/crc-32/-/crc-32-1.2.2.tgz",
+      "integrity": "sha512-ROmzCKrTnOwybPcJApAA6WBWij23HVfGVNKqqrZpuyZOHqK2CwHSvpGuyt/UNNvaIjEd8X5IFGp4Mh+Ie1IHJQ=="
+    },
     "cross-spawn": {
       "version": "6.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -16453,6 +16572,11 @@
       "integrity": "sha512-buRG0fpBtRHSTCOASe6hD258tEubFoRLb4ZNA6NxMVHNw2gOcwHo9wyablzMzOA5z9xA9L1KNjk/Nt6MT9aYow==",
       "dev": true
     },
+    "frac": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/frac/-/frac-1.1.2.tgz",
+      "integrity": "sha512-w/XBfkibaTl3YDqASwfDUqkna4Z2p9cFSr1aHDt0WoMTECnRfBOv2WArlZILlqgWlmdIlALXGpM2AOhEk5W3IA=="
+    },
     "fraction.js": {
       "version": "4.3.7",
       "resolved": "https://registry.npmjs.org/fraction.js/-/fraction.js-4.3.7.tgz",
@@ -19286,6 +19410,14 @@
       "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
       "dev": true
     },
+    "ssf": {
+      "version": "0.11.2",
+      "resolved": "https://registry.npmjs.org/ssf/-/ssf-0.11.2.tgz",
+      "integrity": "sha512-+idbmIXoYET47hH+d7dfm2epdOMUDjqcB4648sTZ+t2JwoyBFL/insLfB/racrDmsKB3diwsDA696pZMieAC5g==",
+      "requires": {
+        "frac": "~1.1.2"
+      }
+    },
     "ssri": {
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",
@@ -20260,6 +20392,16 @@
       "integrity": "sha512-CC1bOL87PIWSBhDcTrdeLo6eGT7mCFtrg0uIJtqJUFyK+eJnzl8A1niH56uu7KMa5XFrtiV+AQuHO3n7DsHnLQ==",
       "dev": true
     },
+    "wmf": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wmf/-/wmf-1.0.2.tgz",
+      "integrity": "sha512-/p9K7bEh0Dj6WbXg4JG0xvLQmIadrner1bi45VMJTfnbVHsc7yIajZyoSoK60/dtVBs12Fm6WkUI5/3WAVsNMw=="
+    },
+    "word": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/word/-/word-0.3.0.tgz",
+      "integrity": "sha512-OELeY0Q61OXpdUfTp+oweA/vtLVg5VDOXh+3he3PNzLGG/y0oylSOC1xRVj0+l4vQ3tj/bB1HVHv1ocXkQceFA=="
+    },
     "wrap-ansi": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
@@ -20310,6 +20452,20 @@
       "dev": true,
       "requires": {}
     },
+    "xlsx": {
+      "version": "0.18.5",
+      "resolved": "https://registry.npmjs.org/xlsx/-/xlsx-0.18.5.tgz",
+      "integrity": "sha512-dmg3LCjBPHZnQp5/F/+nnTa+miPJxUXB6vtk42YjBBKayDNagxGEeIdWApkYPOf3Z3pm3k62Knjzp7lMeTEtFQ==",
+      "requires": {
+        "adler-32": "~1.3.0",
+        "cfb": "~1.2.1",
+        "codepage": "~1.15.0",
+        "crc-32": "~1.2.1",
+        "ssf": "~0.11.2",
+        "wmf": "~1.0.1",
+        "word": "~0.3.0"
+      }
+    },
     "y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
diff --git a/package.json b/package.json
index baec1a6..7660b83 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pld-progression-grouper-app",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "private": true,
   "scripts": {
     "serve": "vue-cli-service serve",
@@ -10,7 +10,8 @@
   "dependencies": {
     "chart.js": "^4.4.0",
     "core-js": "^3.8.3",
-    "vue": "^3.2.13"
+    "vue": "^3.2.13",
+    "xlsx": "^0.18.5"
   },
   "devDependencies": {
     "@babel/core": "^7.12.16",
diff --git a/src/App.vue b/src/App.vue
index e8d947f..73bcd47 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -121,12 +121,15 @@
         </div>
 
         <!-- Buttons for user actions -->
+        <!-- Button for plotting the data point -->
         <button @click="addDataPoint">
           Plot Point
         </button>
+        <!-- Button for printing the page -->
         <button @click="printPage">
           Print Page
         </button>
+        <!-- Button for downloading the chart as an image -->
         <button @click="downloadChart">
           Download Plot
         </button>
@@ -135,15 +138,21 @@
         <button @click="saveDataAsJson">
           Save (JSON)
         </button>
+        <!-- invisible file input element -->
         <input
           ref="fileInput"
           type="file"
           style="display: none;"
           @change="loadDataFromJson"
         >
+        <!-- Button for triggering the file input -->
         <button @click="triggerFileInput">
           Load (JSON)
         </button>
+        <!-- Button for downloading data as Excel -->
+        <button @click="downloadDataAsExcel">
+          Download (Excel)
+        </button>
       </div>
 
       <!-- Container for the chart visualization -->
@@ -251,9 +260,15 @@
 
 
 <script>
+// import the necessary components from Vue.js
 import { ref, onMounted, onUnmounted, computed } from 'vue';
+
+// import the necessary components from Chart.js
 import { Chart, registerables } from 'chart.js';
 
+// Import the XLSX library
+import * as XLSX from 'xlsx';
+
 // Import the package.json file
 import packageInfo from '../package.json'; // Adjust the path to your package.json file
 
@@ -551,7 +566,17 @@ export default {
         tag.setAttribute('content', content);
         document.head.appendChild(tag);
       }
-    }
+    };
+
+    // Method to download data as Excel
+    const downloadDataAsExcel = () => {
+      const wb = XLSX.utils.book_new(); // create a new workbook
+      const ws = XLSX.utils.json_to_sheet(dataPoints.value); // convert data to worksheet
+
+      XLSX.utils.book_append_sheet(wb, ws, "Data"); // append worksheet to workbook
+
+      XLSX.writeFile(wb, "Data.xlsx"); // write workbook and download
+    };
 
     // Lifecycle hook to set up the chart after the component is mounted
     // Update meta tags and initialize chart on component mount
@@ -606,6 +631,7 @@ export default {
       triggerFileInput,
       saveDataAsJson,
       loadDataFromJson,
+      downloadDataAsExcel,
     };
   }
 };