Feature/750 policy api field autocomplete

CHANGELOG.md

@@ -10,6 +10,8 @@ _**For better traceability add the corresponding GitHub issue number in each cha
 
 ### Added
 
+- Added autocomplete endpoint Policy Store API: `GET /irs/policies/attributes/{attribute}`. #750
+
 ### Fixed
 
 - Access and Usage Policy Validation flow correction. #757

docs/src/api/irs-api.yaml

@@ -972,6 +972,74 @@ paths:
       summary: Updates existing policies.
       tags:
       - Policy Store API
+  /irs/policies/attributes/{field}:
+    get:
+      description: Provides autocomplete suggestions for policy fields based on input
+        criteria.
+      operationId: autocomplete
+      parameters:
+      - description: "The field to autocomplete (BPN, policyId, createdOn, validUntil,\
+          \ action)"
+        in: path
+        name: field
+        required: true
+        schema:
+          type: string
+      - description: Search query with restricted character set
+        in: query
+        name: s
+        required: true
+        schema:
+          type: string
+          pattern: "^[a-zA-Z0-9\\-\\+: ]*$"
+      - description: "Limit for the number of results, default is 10 and max is 100"
+        in: query
+        name: limit
+        required: false
+        schema:
+          type: integer
+          format: int32
+          default: 10
+          maximum: 100
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                type: string
+          description: Successful retrieval of autocomplete suggestions
+        "400":
+          content:
+            application/json:
+              examples:
+                error:
+                  $ref: '#/components/examples/error-response-403'
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+          description: Invalid input parameters
+        "401":
+          content:
+            application/json:
+              examples:
+                error:
+                  $ref: '#/components/examples/error-response-401'
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+          description: No valid authentication credentials.
+        "403":
+          content:
+            application/json:
+              examples:
+                error:
+                  $ref: '#/components/examples/error-response-403'
+              schema:
+                $ref: '#/components/schemas/ErrorResponse'
+          description: Authorization refused by server.
+      security:
+      - api_key: []
+      summary: Autocomplete for policy fields
+      tags:
+      - Policy Store API
   /irs/policies/paged:
     get:
       description: |

irs-policy-store/src/main/java/org/eclipse/tractusx/irs/policystore/controllers/PolicyStoreController.java

@@ -45,6 +45,7 @@
 import io.swagger.v3.oas.annotations.security.SecurityRequirement;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.validation.Valid;
+import jakarta.validation.constraints.Max;
 import jakarta.validation.constraints.Pattern;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -104,6 +105,7 @@ public class PolicyStoreController {
     public static final String SEARCH = "search";
     public static final String POLICY_API_TAG = "Policy Store API";
     public static final String API_KEY = "api_key";
+    public static final int MAX_AUTOCOMPLETE_LIMIT = 100;
 
     private final PolicyStoreService service;
 
@@ -211,6 +213,53 @@ public Map<String, List<PolicyResponse>> getPolicies(//
                        .collect(Collectors.toMap(AbstractMap.SimpleEntry::getKey, AbstractMap.SimpleEntry::getValue));
     }
 
+    @GetMapping("/policies/attributes/{field}")
+    @ResponseStatus(HttpStatus.OK)
+    @PreAuthorize("hasAuthority('" + IrsRoles.ADMIN_IRS + "')")
+    @Operation(summary = "Autocomplete for policy fields",
+               description = "Provides autocomplete suggestions for policy fields based on input criteria.",
+               security = @SecurityRequirement(name = API_KEY), //
+               tags = { POLICY_API_TAG }, //
+               responses = { @ApiResponse(responseCode = "200",
+                                          description = "Successful retrieval of autocomplete suggestions",
+                                          content = @Content(mediaType = "application/json",
+                                                             schema = @Schema(implementation = List.class))),
+                             @ApiResponse(responseCode = "400", description = "Invalid input parameters",
+                                          content = { @Content(mediaType = APPLICATION_JSON_VALUE,
+                                                               schema = @Schema(implementation = ErrorResponse.class),
+                                                               examples = @ExampleObject(name = "error",
+                                                                                         ref = "#/components/examples/error-response-403"))
+                                          }),
+                             @ApiResponse(responseCode = "401", description = UNAUTHORIZED_DESC,
+                                          content = { @Content(mediaType = APPLICATION_JSON_VALUE,
+                                                               schema = @Schema(implementation = ErrorResponse.class),
+                                                               examples = @ExampleObject(name = "error",
+                                                                                         ref = "#/components/examples/error-response-401"))
+                                          }),
+                             @ApiResponse(responseCode = "403", description = FORBIDDEN_DESC,
+                                          content = { @Content(mediaType = APPLICATION_JSON_VALUE,
+                                                               schema = @Schema(implementation = ErrorResponse.class),
+                                                               examples = @ExampleObject(name = "error",
+                                                                                         ref = "#/components/examples/error-response-403"))
+                                          })
+               })
+    public List<String> autocomplete(
+            @Parameter(description = "The field to autocomplete (BPN, policyId, createdOn, validUntil, action)") //
+            @PathVariable("field") final String field,
+
+            @Parameter(description = "Search query with restricted character set") @Pattern(
+                    regexp = "^[a-zA-Z0-9\\-\\+: ]*$",
+                    message = "Parameter 's' contains invalid characters") @RequestParam("s") final String value,
+
+            @Parameter(description = "Limit for the number of results, default is 10 and max is 100") @RequestParam(
+                    name = "limit", required = false, defaultValue = "10") @Max(value = MAX_AUTOCOMPLETE_LIMIT,
+                                                                                message = "Parameter 'limit' is above max") final int limit) {
+
+        final Map<String, List<Policy>> bpnToPoliciesMap = service.getPolicies(null);
+        return policyPagingService.autocomplete(bpnToPoliciesMap, field, value, limit);
+
+    }
+
     @GetMapping("/policies/paged")
     @ResponseStatus(HttpStatus.OK)
     @Operation(summary = "Find policies.", //

irs-policy-store/src/main/java/org/eclipse/tractusx/irs/policystore/services/PolicyPagingService.java

@@ -27,10 +27,13 @@
 import static org.eclipse.tractusx.irs.policystore.models.SearchCriteria.Operation.EQUALS;
 import static org.eclipse.tractusx.irs.policystore.models.SearchCriteria.Operation.STARTS_WITH;
 
+import java.time.format.DateTimeFormatter;
 import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Function;
 import java.util.function.Predicate;
+import java.util.stream.Stream;
 
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
@@ -66,30 +69,71 @@ public Page<PolicyWithBpn> getPolicies(final Map<String, List<Policy>> bpnToPoli
 
         final Comparator<PolicyWithBpn> comparator = new PolicyComparatorBuilder(pageable).build();
         final Predicate<PolicyWithBpn> filter = new PolicyFilterBuilder(searchCriteria).build();
-
-        final List<PolicyWithBpn> policies = bpnToPoliciesMap.entrySet()
-                                                             .stream()
-                                                             .flatMap(bpnWithPolicies -> bpnWithPolicies.getValue()
-                                                                                                        .stream()
-                                                                                                        .map(policy -> new PolicyWithBpn(
-                                                                                                                bpnWithPolicies.getKey(),
-                                                                                                                policy)))
-                                                             .filter(filter)
-                                                             .sorted(comparator)
-                                                             .toList();
-
+        final List<PolicyWithBpn> policies = getPolicyWithBpnStream(bpnToPoliciesMap).filter(filter)
+                                                                                     .sorted(comparator)
+                                                                                     .toList();
         return applyPaging(pageable, policies);
     }
 
     private PageImpl<PolicyWithBpn> applyPaging(final Pageable pageable, final List<PolicyWithBpn> policies) {
         final int start = Math.min(pageable.getPageNumber() * pageable.getPageSize(), policies.size());
         final int end = Math.min((pageable.getPageNumber() + 1) * pageable.getPageSize(), policies.size());
         final List<PolicyWithBpn> pagedPolicies = policies.subList(start, end);
-
         return new PageImpl<>(pagedPolicies,
                 PageRequest.of(pageable.getPageNumber(), pageable.getPageSize(), pageable.getSort()), policies.size());
     }
 
+    public List<String> autocomplete(final Map<String, List<Policy>> bpnToPoliciesMap, final String field,
+            final String value, final int limit) {
+
+        if (PROPERTY_BPN.equalsIgnoreCase(field)) {
+            return bpnToPoliciesMap.keySet().stream().filter(t -> StringUtils.startsWithIgnoreCase(t, value)).toList();
+        } else {
+            final Function<PolicyWithBpn, String> fieldSelector = getFieldSelector(field);
+            final Stream<PolicyWithBpn> policyWithBpnStream = getPolicyWithBpnStream(bpnToPoliciesMap);
+            return policyWithBpnStream.map(fieldSelector)
+                                      .filter(s -> StringUtils.startsWithIgnoreCase(s, value))
+                                      .distinct()
+                                      .sorted()
+                                      .limit(limit)
+                                      .toList();
+        }
+    }
+
+    private Stream<PolicyWithBpn> getPolicyWithBpnStream(final Map<String, List<Policy>> bpnToPoliciesMap) {
+        return bpnToPoliciesMap.entrySet()
+                               .stream()
+                               .flatMap(bpnWithPolicies -> bpnWithPolicies.getValue()
+                                                                          .stream()
+                                                                          .map(policy -> new PolicyWithBpn(
+                                                                                  bpnWithPolicies.getKey(), policy)));
+    }
+
+    private Function<PolicyWithBpn, String> getFieldSelector(final String field) {
+
+        final Function<PolicyWithBpn, String> fieldSelector;
+
+        if (PROPERTY_BPN.equalsIgnoreCase(field)) {
+            fieldSelector = PolicyWithBpn::bpn;
+        } else if (PROPERTY_POLICY_ID.equalsIgnoreCase(field)) {
+            fieldSelector = p -> p.policy().getPolicyId();
+        } else if (PROPERTY_CREATED_ON.equalsIgnoreCase(field)) {
+            fieldSelector = p -> DateTimeFormatter.ofPattern("yyyy-MM-dd").format(p.policy().getCreatedOn());
+        } else if (PROPERTY_VALID_UNTIL.equalsIgnoreCase(field)) {
+            fieldSelector = p -> DateTimeFormatter.ofPattern("yyyy-MM-dd").format(p.policy().getValidUntil());
+        } else if (PROPERTY_ACTION.equalsIgnoreCase(field)) {
+            fieldSelector = p -> {
+                final List<Permission> permissions = p.policy().getPermissions();
+                return permissions == null || permissions.isEmpty() ? null : permissions.get(0).getAction().getValue();
+            };
+        } else {
+            log.warn("Field '{}' does not support autocomplete", field);
+            throw new IllegalArgumentException("Field does not support autocomplete");
+        }
+
+        return fieldSelector;
+    }
+
     /**
      * Builder for {@link Comparator} for sorting a list of {@link PolicyWithBpn} objects.
      */

local/testing/request-collection/IRS_Request_Collection.json

@@ -4,6 +4,53 @@
 	"__export_date": "2024-07-08T11:57:49.380Z",
 	"__export_source": "insomnia.desktop.app:v9.3.2",
 	"resources": [
+		{
+			"_id": "req_3abf816e9c8c45518dd6c4f81e7bf1c2",
+			"parentId": "fld_ad061853620b45c397a7906a6e566930",
+			"modified": 1720439689711,
+			"created": 1720199730198,
+			"url": "{{IRS_HOST}}/irs/policies/attributes/{% prompt 'field', '', 'policyId', '', false, true %}",
+			"name": "Policy attribute auto-complete",
+			"description": "",
+			"method": "GET",
+			"body": {},
+			"parameters": [
+				{
+					"id": "pair_7f592a7e237a4ecf9590ddcbcc1aa71a",
+					"name": "limit",
+					"value": "{% prompt 'limit', '', '20', '', false, true %}",
+					"description": "",
+					"disabled": false
+				},
+				{
+					"id": "pair_422cf5b352464645a70e05b1af10f874",
+					"name": "s",
+					"value": "{% prompt 's', '', '', '', false, true %}",
+					"description": "",
+					"disabled": false
+				}
+			],
+			"headers": [
+			],
+			"authentication": {
+				"type": "apikey",
+				"disabled": false,
+				"key": "X-Api-Key",
+				"value": "{{ _.EDC_API_KEY }}",
+				"addTo": "header"
+			},
+			"preRequestScript": "",
+			"metaSortKey": -1705005887717,
+			"isPrivate": false,
+			"pathParameters": [],
+			"settingStoreCookies": true,
+			"settingSendCookies": true,
+			"settingDisableRenderRequestBody": false,
+			"settingEncodeUrl": true,
+			"settingRebuildPath": true,
+			"settingFollowRedirects": "global",
+			"_type": "request"
+		},
 		{
 			"_id": "req_a7c80b4809ac482ea6c7debfc7998505",
 			"parentId": "fld_ad061853620b45c397a7906a6e566930",