Validators for Form Fields

tasks/oop/classes/.htaccess

@@ -0,0 +1,3 @@
+Order deny,allow
+Deny from all
+Allow from 127.0.0.1

tasks/oop/classes/fieldValidator/fieldValidator.php

@@ -0,0 +1,112 @@
+<?php
+class FieldValidator
+{
+  /*
+  * Private members
+  */
+
+  private string $name;
+  private string $value;
+  private string $type;
+  private bool $required;
+  private int $minLen;
+  private int $maxLen;
+  private string $error;
+
+  /*
+  * Constructor
+  */
+
+  public function __construct(string $name, string $value, string $type, bool $required = false, int $minLen = -1, int $maxLen = -1, string $error = "")
+  {
+    $this->name = $name;
+    $this->value = $value;
+    $this->type = $type;
+    $this->required = $required;
+    $this->minLen = $minLen;
+    $this->maxLen = $maxLen;
+    $this->error = $error;
+
+    return $this;
+  }
+
+  /*
+  * Fluent Style
+  */
+
+  public static function create(string $name, string $value, string $type)
+  {
+    return new FieldValidator($name, $value, $type);
+  }
+
+  public function isRequired()
+  {
+    $this->required = true;
+    return $this;
+  }
+
+  public function withMinLen(int $minLen)
+  {
+    $this->minLen = $minLen;
+    return $this;
+  }
+
+  public function withMaxLen(int $maxLen)
+  {
+    $this->maxLen = $maxLen;
+    return $this;
+  }
+
+  /*
+  * Getters and Setters
+  */
+
+  public function getError()
+  {
+    return $this->error;
+  }
+
+  public function getName()
+  {
+    return $this->name;
+  }
+
+  /*
+  * Methods
+  */
+
+  public function isValid()
+  {
+    if ($this->required && empty($this->value)) {
+      $this->error = "$this->name is required";
+      return false;
+    }
+
+    if ($this->minLen >= 0 && !empty($this->value) && strlen($this->value) < $this->minLen) {
+      $this->error = "$this->name requires $this->minLen characters, got " . strlen($this->value);
+      return false;
+    }
+
+    if ($this->maxLen >= 0 && !empty($this->value) && strlen($this->value) > $this->maxLen) {
+      $this->error = "$this->name allows $this->maxLen characters, got " . strlen($this->value);
+      return false;
+    }
+
+    switch ($this->type) {
+      case "email":
+        if (!filter_var($this->value, FILTER_VALIDATE_EMAIL)) {
+          $this->error = "Not a valid E-Mail";
+          return false;
+        }
+        break;
+      case "number":
+        if (!filter_var($this->value, FILTER_VALIDATE_FLOAT) || !filter_var($this->value, FILTER_VALIDATE_INT)) {
+          $this->error = "Not a valid number";
+          return false;
+        }
+        break;
+    }
+
+    return true;
+  }
+}

tasks/oop/classes/formValidator/formValidator.php

@@ -0,0 +1,61 @@
+<?php
+class FormValidator
+{
+  /*
+  * Private members
+  */
+
+  private array $fields;
+
+  /*
+  * Constructor
+  */
+
+  public function __construct(FieldValidator ...$fields)
+  {
+    $this->fields = $fields;
+  }
+
+  /*
+  * Fluent Style
+  */
+
+  public static function create(FieldValidator ...$fields)
+  {
+    return new FormValidator(...$fields);
+  }
+
+  /*
+  * Methods
+  */
+
+  public function isValid()
+  {
+    foreach ($this->fields as $field) {
+      if (!$field->isValid) return false;
+    }
+
+    return true;
+  }
+
+  public function getErrors()
+  {
+    $errors = [];
+
+    foreach ($this->fields as $field) {
+      if (!$field->isValid()) array_push($errors, $field->getError());
+    }
+
+    return $errors;
+  }
+
+  public function getField(string $name)
+  {
+    $field = current(array_filter($this->fields, fn ($field) => strcmp($field->getName(), $name) === 0));
+    if ($field !== false) {
+      return $field;
+    }
+
+    return "No field named $name";
+  }
+}

tasks/oop/classes/hyperlink/hyperlink.php

@@ -0,0 +1,58 @@
+<?php
+class Hyperlink
+{
+  /*
+  * Private members
+  */
+
+  private string $uri;
+  private string $title;
+  private ?string $colour;
+
+  /*
+  * Constructor
+  */
+
+  public function __construct(string $uri, string $title, string $colour = null)
+  {
+    $this->uri = $uri;
+    $this->title = $title;
+    $this->setColour($colour);
+  }
+
+  /*
+  * Getters and Setters
+  */
+
+  public function setColour(string $colour = null)
+  {
+    if ($colour === null) {
+      $this->colour = null;
+      return;
+    }
+
+    if (!preg_match("/^#([0-9A-Fa-f]{3,4}|[0-9A-Fa-f]{6}|[0-9A-Fa-f]{8})$/", $colour)) {
+      trigger_error("Colour invalid", E_USER_WARNING);
+      return;
+    }
+
+    $this->colour = $colour;
+  }
+
+  public function getColour()
+  {
+    return $this->colour ?? "No colour specified";
+  }
+
+  /*
+  * Meta
+  */
+
+  public function __toString()
+  {
+    $style = $this->colour ? "style=\"color:$this->colour;\"" : "";
+    return <<<END
+      <a href="$this->uri" $style>$this->title</a>
+      END;
+  }
+}

tasks/oop/classes/person/person.php

@@ -0,0 +1,33 @@
+<?php
+class Person
+{
+  /*
+  * Private members
+  */
+
+  private string $name;
+  private float $weight;
+  private DateTime $birthdate;
+
+  /*
+  * Constructor
+  */
+
+  public function __construct(string $name, float $weight, DateTime $birthdate)
+  {
+    $this->name = $name;
+    $this->weight = $weight;
+    $this->birthdate = $birthdate;
+  }
+
+  /*
+  * Meta
+  */
+
+  public function __toString()
+  {
+    $formatter = new IntlDateFormatter('en_UK', IntlDateFormatter::SHORT, IntlDateFormatter::SHORT);
+    $formatter->setPattern('E dd.MM.yyyy');
+    return "$this->name, currently {$this->weight}lbs, was born on {$formatter->format($this->birthdate)}";
+  }
+}