Merge pull request #12 from kitzberger/ifs

Feature: ifs within mailtexts

Author: kitzberger

Classes/Domain/Finishers/EmailFinisher.php

@@ -3,6 +3,7 @@
 namespace Kitzberger\FormMailtext\Domain\Finishers;
 
 use TYPO3\CMS\Core\Mail\FluidEmail;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Fluid\View\StandaloneView;
 use TYPO3\CMS\Form\Domain\Runtime\FormRuntime;
 
@@ -18,7 +19,14 @@ protected function initializeStandaloneView(FormRuntime $formRuntime, string $fo
     {
         $standaloneView = parent::initializeStandaloneView($formRuntime, $format);
 
-        $standaloneView->assign('message', $this->parseOption('message'));
+        $message = $this->parseOption('message');
+        $formValues = $formRuntime->getFormState()->getFormValues();
+        #debug($formValues, 'formValues');
+        #debug($message, 'message (before)');
+        $message = $this->replaceIfs($message, $formValues);
+        #debug($message, 'message (after)');
+        #die();
+        $standaloneView->assign('message', $message);
 
         return $standaloneView;
     }
@@ -27,8 +35,83 @@ protected function initializeFluidEmail(FormRuntime $formRuntime): FluidEmail
     {
         $fluidEmail = parent::initializeFluidEmail($formRuntime);
 
-        $fluidEmail->assign('message', $this->parseOption('message'));
+        $message = $this->parseOption('message');
+        $formValues = $formRuntime->getFormState()->getFormValues();
+		$message = $this->replaceIfs($message, $formValues);
+
+        $fluidEmail->assign('message', $message);
 
         return $fluidEmail;
     }
+
+    private function replaceIfs($message, $formValues)
+    {
+        return preg_replace_callback(
+            '/{if:([a-z0-9\-_]+):([^:]+):([a-z0-9\-_,]*)}(.*)({endif})/sU',
+            function($match) use ($formValues) {
+                #debug($match, 'a match!');
+
+                $operandOne = $match[1];
+                $operation  = $match[2];
+                $operandTwo = $match[3];
+
+                list($thenValue, $elseValue) = GeneralUtility::trimExplode('{else}', $match[4], true);
+                #debug([$thenValue, $elseValue]);
+
+                if (isset($formValues[$operandOne])) {
+                    $operandOneValue = $formValues[$operandOne];
+                }
+                if (isset($formValues[$operandTwo])) {
+                    $operandTwoValue = $formValues[$operandTwo];
+                } else {
+                    $operandTwoValue = $operandTwo;
+                }
+
+                switch ($operation) {
+                    case '=':
+                    case '==':
+                    case '===':
+                        if ($operandOneValue == $operandTwoValue) {
+                            return $thenValue;
+                        }
+                        return $elseValue ?? '';
+                    case '>':
+                    case '>':
+                        if ($operandOneValue > $operandTwoValue) {
+                            return $thenValue;
+                        }
+                        return $elseValue ?? '';
+                    case '<':
+                    case '&lt;':
+                        if ($operandOneValue < $operandTwoValue) {
+                            return $thenValue;
+                        }
+                        return $elseValue ?? '';
+                    case '!=':
+                    case '<>':
+                    case '&lt;&gt;':
+                        if ($operandOneValue != $operandTwoValue) {
+                            return $thenValue;
+                        }
+                        return $elseValue ?? '';
+                    case 'in':
+                        // example: {if:multicheckbox-1:in:dog,cat}
+
+                        if (!is_array($operandOneValue)) {
+                            $operandOneValue = [$operandOneValue];
+                        }
+                        $operandTwoValue = GeneralUtility::trimExplode(',', $operandTwoValue, true);
+
+                        foreach ($operandOneValue as $value) {
+                            if (in_array($value, $operandTwoValue)) {
+                                return $thenValue;
+                            }
+                        }
+
+                        return $elseValue ?? '';
+                }
+            },
+            $message
+		);
+	}
 }

README.md

@@ -28,3 +28,21 @@ module.tx_form {
     }
 }
 ```
+
+## Mail text
+
+Within the mail text you can output any user input using the identifier of the input field, e.g. `{text-1}`.
+
+Additionally there's an **experimental feature** enabling you to use `if` like control flows:
+
+```
+Hi {text-1},
+
+you've selected {if:singleselect-1:=:}nothing{endif}{if:singleselect-1:=:1}apple{endif}{if:singleselect-1:=:2}orange{endif}{if:singleselect-1:=:3}banana{endif}.
+
+And your other input is within an array: {if:multiselect-1:in:cat,dog,hamster}it's a pet{endif}
+
+Apparently you like {if:selectsingle-1:=:1}bikes{else}walking{endif}
+
+Good bye.
+```