NodeJS Week 2 homework is done.

humblecoder00 · web-flow · commit 987f8bcd38f0 · 2019-01-22T21:25:05.000+01:00
diff --git a/week2/homework/src/utility/utilityHelp.js b/week2/homework/src/utility/utilityHelp.js
@@ -0,0 +1,20 @@
+"use strict";
+
+const help = [
+  { "T0-DO LIST HELP MENU": "USEFUL COMMANDS" },
+  {
+    "• HELP MENU    ":
+      'Open the help menu with "node index" or "node index help"'
+  },
+  { "• SHOW LIST    ": 'See the list of to-dos with "node index list"' },
+  { "• ADD ITEM     ": 'Add a to-do item with "node index add "itemname""' },
+  {
+    "• UPDATE ITEM  ": 'Update with "node index update "itemNR""newvalue"'
+  },
+  {
+    "• REMOVE ITEM  ": 'Remove a to-do item with "node index remove itemNR"'
+  },
+  { "• RESET        ": 'Reset the list with "node index reset"' }
+];
+
+module.exports = { help };
diff --git a/week2/homework/src/utility/utilityRead.js b/week2/homework/src/utility/utilityRead.js
@@ -0,0 +1,27 @@
+"use strict";
+
+const fs = require("fs");
+
+const utilityRead = function() {
+  fs.readFile("./todolist.json", "utf8", (err, data) => {
+    if (err) {
+      console.log("TO DO LIST:");
+      console.log("[]");
+    } else {
+      try {
+        let showcase = JSON.parse(data);
+        let index = [];
+        for (let i = 0; i < showcase.length; i++) {
+          index.push("Mission: " + (i + 1) + ":", showcase[i]);
+        }
+        console.log("TO DO LIST:");
+        console.log(index);
+      } catch {
+        console.log("TO DO LIST:");
+        console.log("[]");
+      }
+    }
+  });
+};
+
+module.exports = { utilityRead };
diff --git a/week2/homework/src/utility/utilityRemove.js b/week2/homework/src/utility/utilityRemove.js
@@ -0,0 +1,35 @@
+"use strict";
+
+const fs = require("fs");
+
+const utilityRemove = function(index) {
+  try {
+    let currentData = fs.readFileSync("./todolist.json");
+
+    let showcase = JSON.parse(currentData);
+
+    let toDoList = [];
+    for (let i = 0; i < showcase.length; i++) {
+      toDoList.push(showcase[i]);
+    }
+
+    if (toDoList.length > 0 && toDoList.length + 1 > index) {
+      for (let i = 0; i < toDoList.length + 1; i++) {
+        if (i == index) {
+          console.log("Mission Removed:", toDoList[i - 1]);
+          toDoList.splice(i - 1, 1);
+        }
+      }
+      fs.writeFileSync("./todolist.json", JSON.stringify(toDoList));
+    } else {
+      let maximum = toDoList.length;
+      console.log("Please enter a number between the range of 1 and", maximum);
+    }
+  } catch {
+    console.log(
+      "Hey! Calm down. No need to remove anything. List is already empty!"
+    );
+  }
+};
+
+module.exports = { utilityRemove };
diff --git a/week2/homework/src/utility/utilityReset.js b/week2/homework/src/utility/utilityReset.js
@@ -0,0 +1,20 @@
+"use strict";
+
+const fs = require("fs");
+
+const utilityReset = function() {
+  let currentData = fs.readFileSync("todolist.json");
+  let showcase = JSON.parse(currentData);
+  let resetArray = [];
+
+  if (showcase.length === 0) {
+    console.log("List is already empty");
+  } else {
+    console.log("To-do list is reset to zero");
+    fs.writeFileSync("todolist.json", JSON.stringify(resetArray));
+  }
+};
+
+module.exports = {
+  utilityReset
+};
diff --git a/week2/homework/src/utility/utilityUpdate.js b/week2/homework/src/utility/utilityUpdate.js
@@ -0,0 +1,45 @@
+"use strict";
+
+const fs = require("fs");
+
+const utilityUpdate = function(index, updateValue) {
+  try {
+    let currentData = fs.readFileSync("todolist.json");
+
+    let showcase = JSON.parse(currentData);
+
+    let toDoList = [];
+    for (let i = 0; i < showcase.length; i++) {
+      toDoList.push(showcase[i]);
+    }
+
+    if (updateValue == undefined) {
+      throw new Error(
+        console.log("Please enter the update value after item number")
+      );
+    }
+
+    if (toDoList.length > 0 && toDoList.length + 1 > index) {
+      for (let i = 0; i < toDoList.length + 1; i++) {
+        if (i == index) {
+          console.log(
+            "Mission Updated:",
+            "\nOld value was:",
+            toDoList[i - 1],
+            "\nNew value is:",
+            updateValue
+          );
+          toDoList.splice(i - 1, 1, { title: updateValue });
+        }
+      }
+      fs.writeFileSync("todolist.json", JSON.stringify(toDoList));
+    } else {
+      let maximum = toDoList.length;
+      console.log("Please enter a number between the range of 1 and", maximum);
+    }
+  } catch {
+    console.log("");
+  }
+};
+
+module.exports = { utilityUpdate };
