Add new API to fetch UI policy list

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/api/PolicyManagementService.java

@@ -860,4 +860,81 @@ public interface PolicyManagementService {
                          @QueryParam("limit")
                                  int limit
     );
+
+    @GET
+    @Path("/list")
+    @ApiOperation(
+            produces = MediaType.APPLICATION_JSON,
+            httpMethod = "GET",
+            value = "Getting list of Policies",
+            responseContainer = "List",
+            notes = "Retrieve the details of all the policies in WSO2 EMM.",
+            response = Policy.class,
+            tags = "Device Policy Management",
+            extensions = {
+                    @Extension(properties = {
+                            @ExtensionProperty(name = Constants.SCOPE, value = "perm:policies:get-details")
+                    })
+            }
+    )
+    @ApiResponses(
+            value = {
+                    @ApiResponse(
+                            code = 200,
+                            message = "OK. \n Successfully fetched policies.",
+                            response = Policy.class,
+                            responseContainer = "List",
+                            responseHeaders = {
+                                    @ResponseHeader(
+                                            name = "Content-Type",
+                                            description = "The content type of the body"),
+                                    @ResponseHeader(
+                                            name = "ETag",
+                                            description = "Entity Tag of the response resource.\n" +
+                                                    "Used by caches, or in conditional requests."),
+                                    @ResponseHeader(
+                                            name = "Last-Modified",
+                                            description = "Date and time the resource was last modified.\n" +
+                                                    "Used by caches, or in conditional requests."),
+                            }
+                    ),
+                    @ApiResponse(
+                            code = 304,
+                            message = "Not Modified. \n Empty body because the client already has the latest version " +
+                                    "of the requested resource."),
+                    @ApiResponse(
+                            code = 400,
+                            message = "Bad Request. \n Invalid request or validation error.",
+                            response = ErrorResponse.class),
+                    @ApiResponse(
+                            code = 406,
+                            message = "Not Acceptable.\n The requested media type is not supported"),
+                    @ApiResponse(
+                            code = 500,
+                            message = ("Internal Server Error. \n Server error occurred while fetching the policies."),
+                            response = ErrorResponse.class)
+            })
+    Response getPolicyList(
+            @ApiParam(
+                    name = "If-Modified-Since",
+                    value = "Checks if the requested variant was modified, since the specified date-time. \n" +
+                            "Provide the value in the following format: EEE, d MMM yyyy HH:mm:ss Z.\n" +
+                            "Example: Mon, 05 Jan 2014 15:10:00 +0200",
+                    required = false)
+            @HeaderParam("If-Modified-Since")
+            String ifModifiedSince,
+            @ApiParam(
+                    name = "offset",
+                    value = "The starting pagination index for the complete list of qualified items",
+                    required = false,
+                    defaultValue = "0")
+            @QueryParam("offset")
+            int offset,
+            @ApiParam(
+                    name = "limit",
+                    value = "Provide how many policy details you require from the starting pagination index/offset.",
+                    required = false,
+                    defaultValue = "5")
+            @QueryParam("limit")
+            int limit);
 }

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/PolicyManagementServiceImpl.java

@@ -498,4 +498,35 @@ public class PolicyManagementServiceImpl implements PolicyManagementService {
 
     }
 
+    @GET
+    @Path("/list")
+    @Override
+    public Response getPolicyList(
+            @HeaderParam("If-Modified-Since") String ifModifiedSince,
+            @QueryParam("offset") int offset,
+            @QueryParam("limit") int limit) {
+        RequestValidationUtil.validatePaginationParameters(offset, limit);
+        PolicyManagerService policyManagementService = DeviceMgtAPIUtils.getPolicyManagementService();
+        List<Policy> policies;
+        List<Policy> filteredPolicies;
+        PolicyList targetPolicies = new PolicyList();
+        try {
+            PolicyAdministratorPoint policyAdministratorPoint = policyManagementService.getPAP();
+            policies = policyAdministratorPoint.getPolicyList();
+            targetPolicies.setCount(policies.size());
+            if (offset == 0 && limit == 0) {
+                targetPolicies.setList(policies);
+            } else {
+                filteredPolicies = FilteringUtil.getFilteredList(policies, offset, limit);
+                targetPolicies.setList(filteredPolicies);
+            }
+        } catch (PolicyManagementException e) {
+            String msg = "Error occurred while retrieving all available policies";
+            log.error(msg, e);
+            return Response.serverError().entity(
+                    new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+        }
+        return Response.status(Response.Status.OK).entity(targetPolicies).build();
+    }
+
 }

components/policy-mgt/org.wso2.carbon.policy.mgt.common/src/main/java/org/wso2/carbon/policy/mgt/common/PolicyAdministratorPoint.java

@@ -163,4 +163,6 @@ public interface PolicyAdministratorPoint {
      * @throws PolicyManagementException
      */
     List<Policy> getPolicies(String policyType) throws PolicyManagementException;
+
+    List<Policy> getPolicyList() throws PolicyManagementException;
 }

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/impl/PolicyAdministratorPointImpl.java

@@ -332,4 +332,9 @@ public class PolicyAdministratorPointImpl implements PolicyAdministratorPoint {
             return policyManager.getPolicies(policyType);
         }
     }
+
+    @Override
+    public List<Policy> getPolicyList() throws PolicyManagementException {
+        return policyManager.getPolicyList();
+    }
 }

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/mgt/PolicyManager.java

@@ -89,4 +89,6 @@ public interface PolicyManager {
     HashMap<Integer, Integer> getAppliedPolicyIdsDeviceIds() throws PolicyManagementException;
 
     List<Policy> getPolicies(String type) throws PolicyManagementException;
+
+    List<Policy> getPolicyList() throws PolicyManagementException;
 }

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/mgt/impl/PolicyManagerImpl.java

@@ -1502,4 +1502,33 @@ public class PolicyManagerImpl implements PolicyManager {
         correctiveAction.setAssociatedGeneralPolicyId(null); //avoiding send in payload
         correctiveAction.setFeatureId(null); //avoiding send in payload
     }
+
+    @Override
+    public List<Policy> getPolicyList() throws PolicyManagementException {
+
+        List<Policy> policyList;
+        try {
+            PolicyManagementDAOFactory.openConnection();
+            policyList = policyDAO.getAllPolicies();
+            for (Policy policy : policyList) {
+                policy.setRoles(policyDAO.getPolicyAppliedRoles(policy.getId()));
+                policy.setUsers(policyDAO.getPolicyAppliedUsers(policy.getId()));
+                List<DeviceGroupWrapper> deviceGroupWrappers = policyDAO.getDeviceGroupsOfPolicy(policy.getId());
+                if (!deviceGroupWrappers.isEmpty()) {
+                    deviceGroupWrappers = this.getDeviceGroupNames(deviceGroupWrappers);
+                }
+                policy.setDeviceGroups(deviceGroupWrappers);
+            }
+            Collections.sort(policyList);
+        } catch (PolicyManagerDAOException e) {
+            throw new PolicyManagementException("Error occurred while getting all the policies.", e);
+        } catch (SQLException e) {
+            throw new PolicyManagementException("Error occurred while opening a connection to the data source", e);
+        } catch (GroupManagementException e) {
+            throw new PolicyManagementException("Error occurred while getting device groups.", e);
+        } finally {
+            PolicyManagementDAOFactory.closeConnection();
+        }
+        return policyList;
+    }
 }