CCMSPUI-468 | Add date picker component

laa-ccms-spring-boot-starters/laa-ccms-spring-boot-starter-govuk-dialect/src/main/java/uk/gov/laa/ccms/springboot/dialect/DatePickerElementTagProcessor.java

@@ -0,0 +1,105 @@
+package uk.gov.laa.ccms.springboot.dialect;
+
+import java.util.Map;
+import org.thymeleaf.context.ITemplateContext;
+import org.thymeleaf.model.IModel;
+import org.thymeleaf.model.IModelFactory;
+import org.thymeleaf.model.IProcessableElementTag;
+import org.thymeleaf.processor.element.AbstractElementTagProcessor;
+import org.thymeleaf.processor.element.IElementTagStructureHandler;
+import org.thymeleaf.templatemode.TemplateMode;
+
+/**
+ * hello.
+ */
+public class DatePickerElementTagProcessor extends AbstractElementTagProcessor {
+
+  private static final String TAG_NAME = "datepicker";
+  private static final int PRECEDENCE = 900;
+
+  public DatePickerElementTagProcessor() {
+    super(TemplateMode.HTML, "moj", TAG_NAME, true, null, false, PRECEDENCE);
+  }
+
+  @Override
+  protected void doProcess(ITemplateContext context, IProcessableElementTag tag,
+                           IElementTagStructureHandler structureHandler) {
+
+    Map<String, String> attributes = ProcessorUtils.parseAttributes(context, tag);
+
+    String id = attributes.getOrDefault("id", "date");
+    String name = attributes.getOrDefault("name", "date");
+    String value = attributes.get("value");
+    String label = attributes.getOrDefault("label", "Date");
+    String hint = attributes.getOrDefault("hint", "For example, 17/5/2024.");
+    String errorMessage = attributes.getOrDefault("errorMessage", "Enter or select a date");
+    String minDate = attributes.get("minDate");
+    String maxDate = attributes.get("maxDate");
+
+    boolean hasError = !errorMessage.isEmpty();
+
+    String datePickerHtml =
+        buildDatePickerHtml(id, name, label, hint, errorMessage, hasError, minDate, maxDate);
+
+    final IModelFactory modelFactory = context.getModelFactory();
+    final IModel model = modelFactory.parse(context.getTemplateData(), datePickerHtml);
+    structureHandler.replaceWith(model, false);
+
+  }
+
+  private String buildDatePickerHtml(String id, String name, String label, String hint,
+                                     String errorMessage, boolean hasError, String minDate,
+                                     String maxDate) {
+    StringBuilder html = new StringBuilder();
+    html.append("<div class=\"moj-datepicker\" data-module=\"moj-date-picker\"");
+
+    if (!minDate.isEmpty()) {
+      html.append(" data-min-date=\"").append(minDate).append("\"");
+    }
+    if (!maxDate.isEmpty()) {
+      html.append(" data-max-date=\"").append(maxDate).append("\"");
+    }
+
+    html.append(">")
+        .append("<div class=\"govuk-form-group");
+
+    if (hasError) {
+      html.append(" govuk-form-group--error");
+    }
+
+    html.append("\">")
+        .append("<label class=\"govuk-label\" for=\"").append(id).append("\">")
+        .append(label)
+        .append("</label>")
+        .append("<div id=\"").append(id).append("-hint\" class=\"govuk-hint\">")
+        .append(hint)
+        .append("</div>");
+
+    if (hasError) {
+      html.append("<p id=\"").append(id).append("-error\" class=\"govuk-error-message\">")
+          .append("<span class=\"govuk-visually-hidden\">Error:</span> ")
+          .append(errorMessage)
+          .append("</p>");
+    }
+
+    html.append("<input class=\"govuk-input moj-js-datepicker-input");
+
+    if (hasError) {
+      html.append(" govuk-input--error");
+    }
+
+    html.append("\" id=\"").append(id)
+        .append("\" name=\"").append(name)
+        .append("\" type=\"text\" aria-describedby=\"").append(id).append("-hint");
+
+    if (hasError) {
+      html.append(" ").append(id).append("-error");
+    }
+
+    html.append("\" autocomplete=\"off\">")
+        .append("</div>")
+        .append("</div>");
+
+    return html.toString();
+  }
+}

laa-ccms-spring-boot-starters/laa-ccms-spring-boot-starter-govuk-dialect/src/main/java/uk/gov/laa/ccms/springboot/dialect/GovUkThymeleafDialectConfig.java

@@ -19,4 +19,9 @@ public GovUkDialect govUkDialect() {
     return new GovUkDialect();
   }
 
+  @Bean
+  public MojCustomDialect mojCustomDialect() {
+    return new MojCustomDialect();
+  }
+
 }

laa-ccms-spring-boot-starters/laa-ccms-spring-boot-starter-govuk-dialect/src/main/java/uk/gov/laa/ccms/springboot/dialect/MojCustomDialect.java

@@ -0,0 +1,17 @@
+package uk.gov.laa.ccms.springboot.dialect;
+
+import java.util.Set;
+import org.thymeleaf.dialect.AbstractProcessorDialect;
+import org.thymeleaf.processor.IProcessor;
+
+public class MojCustomDialect extends AbstractProcessorDialect {
+
+  public MojCustomDialect() {
+    super("MOJ Custom Dialect", "moj", 1000);
+  }
+
+  @Override
+  public Set<IProcessor> getProcessors(String dialectPrefix) {
+    return Set.of(new DatePickerElementTagProcessor());
+  }
+}

laa-ccms-spring-boot-starters/laa-ccms-spring-boot-starter-govuk-dialect/src/test/java/uk/gov/laa/ccms/springboot/dialect/MoJDatePickerElementTagProcessorTest.java

@@ -0,0 +1,7 @@
+package uk.gov.laa.ccms.springboot.dialect;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class MoJDatePickerElementTagProcessorTest {
+
+}