EchedeyLR
/
DSW


			
				
					
						
						
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							<!DOCTYPE html>
<!--
Copyright (C) 2021 Echedey López Romero <elr@disroot.org>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
-->
<html lang="es">
<head>
	<meta charset="UTF-8" />
	<meta http-equiv="X-UA-Compatible" content="IE=edge" />
	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
	<meta name="author" content="Echedey López Romero" />
	<title>Calculadora de IMC</title>
	<link rel="stylesheet" href="./bootstrap/css/bootstrap.min.css" />
	<script src="./jquery/jquery-3.5.1.slim.min.js"></script>
	<script src="./bootstrap/js/bootstrap.bundle.min.js"></script>
	<style>
		.centro {
			text-align: center;
		}
	</style>
	<script>
		function Limpiar() {
			let Operadores = document.getElementsByTagName("input");

			for (let Pos = 0; Pos < Operadores.length; Pos++) {
				Operadores[Pos].setAttribute("value", "");
			}

			let IMCSpan = document.getElementById("imcspan");
			let IMC = document.getElementById("imc");
			let DescripcionSpan = document.getElementById("descripcionspan");
			let Descripcion = document.getElementById("descripcion");

			IMCSpan.textContent = "IMC";
			IMC.textContent = "--";
			DescripcionSpan.textContent = "Descripción";
			Descripcion.textContent = "--";
		}
	</script>
</head>
<body class="container">
	<?php
		// Mostrar errores por pantalla
		ini_set('display_errors', '1');
		ini_set('display_startup_errors', '1');
		error_reporting(E_ALL);

		// Inicializar variables iniciales
		$IMC = "";
		$Descripcion = "";
		$Peso = "";
		$Altura = "";

		// Comprobar que se realizar operacion
		if (isset($_REQUEST["operacion"])) {
			$Operacion = $_REQUEST["operacion"];

			// Validar el tipo de operacion
			if ($Operacion == "calcular") {
				// Comprobar que se envian los operadores
				if (!isset($_REQUEST["peso"]) || !isset($_REQUEST["altura"])) {
					$IMC = "ERROR";
					$Descripcion = "Deben enviarse los 2 operadores.";
				} else {
					// Establecer valor a los operadores
					$Peso = $_REQUEST["peso"];
					$Altura = $_REQUEST["altura"];

					// Validar el tipo de valor de los operadores
					if ($Peso == "" || $Altura == "") {
						$IMC = "ERROR";
						$Descripcion = "Los operadores deben tener valor.";
					} else if (is_numeric($Peso) && is_numeric($Altura)) {
						if ($Peso == 0 || $Altura == 0) {
							$IMC = "ERROR";
							$Descripcion = "Los operadores deben tener valor distinto de 0.";
						} else if ($Peso < 0 || $Altura < 0) {
							$IMC = "ERROR";
							$Descripcion = "Los operadores deben tener valor positivo.";
						} else {
							$IMC = round($Peso / ($Altura * $Altura), 2);

							// Comprobar descripcion correspondiente
							if ($IMC < 18.5) {
								$Descripcion = "<span style=\"color: red\">Delgadez</span>";
							} else if ($IMC >= 18.5 && $IMC < 25) {
								$Descripcion = "<span style=\"color: green\">Peso normal</span>";
							} else if ($IMC >= 25 && $IMC < 29.9) {
								$Descripcion = "<span style=\"color: orange\">Sobrepeso</span>";
							} else {
								$Descripcion = "<span style=\"color: red\">Obesidad</span>";
							}
						}
					} else {
						$IMC = "ERROR";
						$Descripcion = "Los operadores deben tener valor numérico.";
					}
				}
			} else {
				$IMC = "ERROR";
				$Descripcion = "La operación debe ser «calcular».";
			}
		}
	?>
	<div class="row my-3">
		<div class="col-lg-3 col-md-2 col-sm-1"></div>
		<div class="col-lg-6 col-md-8 col-sm-10 col-xs-12 border border-primary rounded p-3">
			<h1 class="centro">Calculadora de IMC</h1>
			<form action="./index.php" method="POST" class="mb-2">
				<div class="form-group">
					<label for="peso">Peso</label>
					<input type="number" name="peso" id="peso" value="<?php echo($Peso) ?>" 
					placeholder="0" step="0.1" required class="form-control form-control-lg" />
				</div>
				<div class="form-group">
					<label for="altura">Altura</label>
					<input type="number" name="altura" id="altura" value="<?php echo($Altura) ?>" 
					placeholder="0" step="0.01" required class="form-control form-control-lg" />
				</div>
				<?php
					if ($IMC == "ERROR") {
				?>
					<span id="imcspan" class="d-block mb-2 centro">¡Aviso!</span>
					<p id="imc" class="border border-secondary rounded mb-2 p-2 centro"><?php echo($IMC) ?></p>
					
					<span id="descripcionspan" class="d-block mb-2 centro">Interpretación</span>
					<p id="descripcion" class="border border-secondary rounded p-2 centro"><?php echo($Descripcion) ?></p>
				<?php
					} else if (is_numeric($IMC)) {
				?>
					<span id="imcspan" class="d-block mb-2 centro">IMC</span>
					<p id="imc" class="border border-secondary rounded mb-2 p-2 centro"><?php echo($IMC) ?></p>
					
					<span id="descripcionspan" class="d-block mb-2 centro">Descripción</span>
					<p id="descripcion" class="border border-secondary rounded p-2 centro"><?php echo($Descripcion) ?></p>
				<?php
					} else {
				?>
					<span id="imcspan" class="d-block mb-2 centro">IMC</span>
					<p id="imc" class="border border-secondary rounded mb-2 p-2 centro">--</p>

					<span id="descripcionspan" class="d-block mb-2 centro">Descripción</span>
					<p id="descripcion" class="border border-secondary rounded p-2 centro">--</p>
				<?php } ?>
				<button type="submit" name="operacion" value="calcular"
				class="btn btn-primary btn-lg btn-block mb-1">Calcular</button>
				<button type="reset" class="btn btn-danger btn-lg btn-block" 
				onclick="Limpiar()">Limpiar</button>
			</form>
		</div>
		<div class="col-lg-3 col-md-2 col-sm-1"></div>
	</div>
</body>
</html>