add edit water consumption.

Author: Max-Z80

.gitignore

@@ -1,7 +1,7 @@
 # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 
 # repositories
-/doc
+/documentation
 # dependencies
 /node_modules
 /.pnp

.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+  // Utilisez IntelliSense pour en savoir plus sur les attributs possibles.
+  // Pointez pour afficher la description des attributs existants.
+  // Pour plus d'informations, visitez : https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Launch Program",
+      "program": "${workspaceFolder}/server.js",
+      "runtimeExecutable": "/home/max/.config/nvm/versions/node/v10.20.1/bin/node"
+    }
+  ]
+}

Consumption.js

@@ -0,0 +1,29 @@
+function Consumption() {
+  this.date = null;
+  this.m3 = null;
+
+  /** Parse data from req.body
+   * @param {object} body
+   */
+  Consumption.prototype.parse = function(body) {
+    if (body) {
+      if (body.consumptionDate && body.consumptionM3) {
+        this.date = body.consumptionDate;
+        this.m3 = body.consumptionM3;
+        return;
+      }
+    }
+
+    this.date = null;
+    this.m3 = null;
+  };
+
+  /**
+   * Get consumption as CSV line
+   */
+  Consumption.prototype.getAsCSV = function() {
+    return this.date + ";" + this.m3 + "\n";
+  };
+}
+
+module.exports = Consumption;

DataHandler.js

@@ -0,0 +1,91 @@
+const fs = require("fs");
+const csvParse = require("csv-parse/lib/sync");
+const csvStringify = require("csv-stringify");
+
+function DataHandler() {
+  const fileName = "./consumption.csv";
+  const fileEncoding = "utf8";
+  const csvDelimiter = ";";
+
+  /**
+   * Read and parse CSV file
+   */
+  function read() {
+    const content = fs.readFileSync(fileName, fileEncoding);
+    const parsedCSV = csvParse(content, {
+      delimiter: csvDelimiter,
+      columns: true
+    });
+    return parsedCSV;
+  }
+
+  /**
+   * Find and replace a consumption within a list which as the same date
+   * @param {*} consumptions list of consumption
+   * @param {*} consumption the consumption which wil be used for the replacement
+   */
+  function replaceByDate(consumptions, consumption) {
+    if (consumptions instanceof Array && consumptions.length > 0) {
+      return consumptions.map(input => {
+        if (consumption.date === input.date) {
+          input.m3 = consumption.m3;
+        }
+        return input;
+      });
+    }
+  }
+
+  /**
+   * write file
+   * @returns {Promise}
+   */
+  function write(consumptions) {
+    return new Promise((resolve, reject) => {
+      csvStringify(
+        consumptions,
+        {
+          columns: [{ key: "date" }, { key: "m3" }],
+          header: true,
+          delimiter: csvDelimiter
+        },
+        (err, output) => {
+          fs.writeFile(fileName, output, { flag: "w" }, err => {
+            if (err) {
+              console.log("Could not write data to consumption.csv");
+              reject();
+              return;
+            }
+            resolve();
+          });
+          if (err) {
+            console.log("Could not write data to consumption.csv");
+            reject();
+          }
+        }
+      );
+    });
+  }
+
+  /**
+   * Append a new consumption to the end of the file
+   * @param {*} consumption the consumption to append
+   */
+  function append(consumption) {
+    const line = consumption.getAsCSV();
+
+    fs.writeFile(fileName, line, { flag: "a+" }, err => {
+      if (err) {
+        console.log("Could not write data to consumption.csv");
+      }
+    });
+  }
+
+  return {
+    append,
+    read,
+    replaceByDate,
+    write
+  };
+}
+
+module.exports = DataHandler;

README.md

@@ -0,0 +1,27 @@
+date;m3
+2020-12-18;100
+2020-12-20;123
+2020-12-25;222
+2020-12-26;300
+2020-12-10;50
+2020-12-24;250
+2020-12-23;300
+2020-12-22;400
+2020-12-11;500
+2020-12-31;600
+2020-12-01;20
+2020-12-02;123
+2020-12-03;300
+2020-12-04;300
+2020-12-05;400
+2020-12-05;500
+2020-12-06;456
+2020-12-07;666
+2020-11-02;444
+2020-11-03;132
+2020-11-04;500
+2020-11-05;100
+2020-11-06;900
+2020-11-11;300
+2020-11-20;500
+2020-11-23;1000