clone components

packages/core/strapi/lib/services/entity-service/components.js

@@ -322,6 +322,91 @@ const deleteComponents = async (uid, entityToDelete, { loadComponents = true } =
   }
 };
 
+const cloneComponents = async (uid, entityToClone, data) => {
+  const { attributes = {} } = strapi.getModel(uid);
+
+  const componentBody = {};
+  const componentData = await getComponents(uid, entityToClone);
+
+  for (const attributeName of Object.keys(attributes)) {
+    const attribute = attributes[attributeName];
+
+    // If the attribute is not set or on the component to clone, skip it
+    if (!has(attributeName, data) && !has(attributeName, componentData)) {
+      continue;
+    }
+
+    if (attribute.type === 'component') {
+      const { component: componentUID, repeatable = false } = attribute;
+
+      const componentValue = has(attributeName, data)
+        ? data[attributeName]
+        : componentData[attributeName];
+
+      if (repeatable === true) {
+        if (!Array.isArray(componentValue)) {
+          throw new Error('Expected an array to create repeatable component');
+        }
+
+        // MySQL/MariaDB can cause deadlocks here if concurrency higher than 1
+        const components = await mapAsync(
+          componentValue,
+          (value) => cloneComponent(componentUID, value),
+          { concurrency: isDialectMySQL() ? 1 : Infinity }
+        );
+
+        componentBody[attributeName] = components.filter(_.negate(_.isNil)).map(({ id }) => {
+          return {
+            id,
+            __pivot: {
+              field: attributeName,
+              component_type: componentUID,
+            },
+          };
+        });
+      } else {
+        const component = await cloneComponent(componentUID, componentValue);
+        componentBody[attributeName] = component && {
+          id: component.id,
+          __pivot: {
+            field: attributeName,
+            component_type: componentUID,
+          },
+        };
+      }
+
+      continue;
+    }
+
+    if (attribute.type === 'dynamiczone') {
+      const dynamiczoneValues = has(attributeName, data)
+        ? data[attributeName]
+        : componentData[attributeName];
+
+      if (!Array.isArray(dynamiczoneValues)) {
+        throw new Error('Expected an array to create repeatable component');
+      }
+      // MySQL/MariaDB can cause deadlocks here if concurrency higher than 1
+      componentBody[attributeName] = await mapAsync(
+        dynamiczoneValues,
+        async (value) => {
+          const { id } = await cloneComponent(value.__component, value);
+          return {
+            id,
+            __component: value.__component,
+            __pivot: {
+              field: attributeName,
+            },
+          };
+        },
+        { concurrency: isDialectMySQL() ? 1 : Infinity }
+      );
+      continue;
+    }
+  }
+
+  return componentBody;
+};
 /** *************************
     Component queries
 ************************** */
@@ -377,6 +462,26 @@ const deleteComponent = async (uid, componentToDelete) => {
   await strapi.query(uid).delete({ where: { id: componentToDelete.id } });
 };
 
+const cloneComponent = async (uid, data) => {
+  const model = strapi.getModel(uid);
+
+  if (!has('id', data)) {
+    return createComponent(uid, data);
+  }
+
+  const componentData = await cloneComponents(uid, { id: data.id }, data);
+  const transform = pipe(
+    // Make sure we don't save the component with a pre-defined ID
+    omit('id'),
+    // Remove the component data from the original data object ...
+    (payload) => omitComponentData(model, payload),
+    // ... and assign the newly created component instead
+    assign(componentData)
+  );
+
+  return strapi.query(uid).clone(data.id, { data: transform(data) });
+};
+
 module.exports = {
   omitComponentData,
   getComponents,
@@ -384,4 +489,5 @@ module.exports = {
   updateComponents,
   deleteComponents,
   deleteComponent,
+  cloneComponents,
 };

packages/core/strapi/lib/services/entity-service/index.js

@@ -16,6 +16,7 @@ const {
   createComponents,
   updateComponents,
   deleteComponents,
+  cloneComponents,
 } = require('./components');
 const { pickSelectionParams } = require('./params');
 const { applyTransforms } = require('./attributes');
@@ -291,9 +292,7 @@ const createDefaultImplementation = ({ strapi, db, eventHub, entityValidator })
     const query = transformParamsToQuery(uid, pickSelectionParams(wrappedParams));
 
     // TODO: wrap into transaction
-    // TODO: Implement cloneComponents
-    // const componentData = await cloneComponents(uid, validData);
-    const componentData = await createComponents(uid, validData);
+    const componentData = await cloneComponents(uid, entityToClone, validData);
 
     const entityData = creationPipeline(
       Object.assign(omitComponentData(model, validData), componentData),