add content template component model

Author: wildone

aemdesign-aem-services/src/main/java/design/aem/models/v2/content/ContentTemplate.java

@@ -0,0 +1,78 @@
+package design.aem.models.v2.content;
+
+import design.aem.components.ComponentProperties;
+import design.aem.models.ModelProxy;
+import design.aem.utils.components.ComponentsUtil;
+import org.apache.commons.jexl3.*;
+
+import static design.aem.utils.components.ComponentsUtil.*;
+import static org.apache.commons.lang3.StringUtils.isNotEmpty;
+
+public class ContentTemplate extends ModelProxy {
+
+    protected ComponentProperties componentProperties = null;
+    protected ComponentProperties requestComponentProperties = null;
+    public ComponentProperties getComponentProperties() {
+        return this.componentProperties;
+    }
+    public ComponentProperties getRequestComponentProperties() {
+        return this.requestComponentProperties;
+    }
+
+    public static final String REQUEST_COMPONENT_PROPERTIES = "design.aem.models.v2.content.ContentTemplate.componentProperties";
+    public static final String FIELD_CUSTOM_TEMPLATE_JEXL = "customTemplateJEXL";
+
+    protected void ready() {
+        /*
+          Component Fields Helper
+
+          Structure:
+          1 required - property name,
+          2 required - default value,
+          3 optional - name of component attribute to add value into
+          4 optional - canonical name of class for handling multivalues, String or Tag
+         */
+        setComponentFields(new Object[][]{
+                {"templatePath", ""},
+                {FIELD_CUSTOM_TEMPLATE_JEXL, ""},
+                {"templateUse", "templatePath"},
+                {FIELD_VARIANT, DEFAULT_VARIANT}
+        });
+
+        componentProperties = ComponentsUtil.getComponentProperties(
+                this,
+                componentFields,
+                DEFAULT_FIELDS_STYLE,
+                DEFAULT_FIELDS_ACCESSIBILITY);
+
+        String customTemplate = componentProperties.get(FIELD_CUSTOM_TEMPLATE_JEXL,"");
+        String customTemplateOutput = "";
+
+        requestComponentProperties = (ComponentProperties)getRequest().getAttribute(REQUEST_COMPONENT_PROPERTIES);
+
+        if (isNotEmpty(customTemplate) && requestComponentProperties != null) {
+
+            JexlEngine jexl = new JexlBuilder().create();
+            JxltEngine jxlt = jexl.createJxltEngine();
+            JexlContext jc = new MapContext(requestComponentProperties);
+
+            //try to evaluate default value expression
+            try {
+                JxltEngine.Expression expr = jxlt.createExpression(customTemplate);
+
+                //add componentProperties as a variable as well
+                jc.set("componentProperties", requestComponentProperties);
+
+                customTemplateOutput = (String)expr.evaluate(jc);
+
+            } catch (JexlException jex) {
+                LOGGER.warn("could not evaluate default value expression customTemplate={}, requestComponentProperties={}, jex.info={}", customTemplate, requestComponentProperties, jex.getInfo());
+            } catch (Exception ex) {
+                LOGGER.error("could not evaluate default value expression customTemplate={}, requestComponentProperties={}, error={}", customTemplate, requestComponentProperties, ex);
+            }
+
+        }
+        componentProperties.put("customTemplateJEXLOutput", customTemplateOutput);
+
+    }
+}