Created backend functionality to get properties

backend/src/routes/properties/property-mappings.ts

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+import { MappingDefinition } from "sparql-result-converter";
+
+const propertyMapping: MappingDefinition[] = [
+    {
+        rootName: 'properties',
+        propertyToGroup: 'propertyInstance',
+        name: 'property',
+        toCollect: ["describedElementIri", "propertyInstance", "expressionGoal", "logicInterpretation", "value",
+            "propertyTypeIri", "code", "definition", "unit"],
+    },
+
+
+];
+
+export {
+    propertyMapping,
+};

backend/src/routes/properties/property.controller.ts

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+import { Controller, Get, Param, Query } from "@nestjs/common";
+import { PropertyDTO } from "../../models/properties/PropertyDTO";
+import { PropertyService } from "./property.service";
+
+@Controller('/properties')
+export class PropertyController {
+
+    constructor(
+        private propertyService: PropertyService
+    ) {}
+
+    /**
+     * Get all properties (of all capabilities) that are currently registered
+     */
+    @Get()
+    getAllProperties(): Promise<Array<PropertyDTO>> {
+        return this.propertyService.getAllProperties();
+    }
+
+    /**
+     * Get a specific property by its IRI
+     * @param propertyIri IRI of the property to get
+     */
+    @Get(':propertyIri')
+    getPropertyByIri(@Param('propertyIri') propertyIri: string): Promise<PropertyDTO> {
+        return this.propertyService.getPropertyByIri(propertyIri);
+    }
+
+
+    /**
+     * Returns all properties of a given capability
+     * @param capabilityIri: IRI of the capability to find properties of
+     */
+    @Get('')
+    getSkillsOfCapability(@Query('capabilityIri') capabilityIri: string): Promise<PropertyDTO[]>{
+        return this.propertyService.getInputPropertiesOfCapability(capabilityIri);
+    }
+
+}

backend/src/routes/properties/property.module.ts

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+import { Module } from "@nestjs/common";
+import { PropertyController } from "./property.controller";
+import { PropertyService } from "./property.service";
+
+@Module({
+    imports: [],
+    controllers: [PropertyController],
+    providers: [PropertyService],
+    exports: [PropertyService],
+})
+export class PropertyModule {}

backend/src/routes/properties/property.service.ts

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+import { Injectable } from "@nestjs/common";
+import { SparqlResultConverter } from "sparql-result-converter";
+import { GraphDbConnectionService } from "../../util/GraphDbConnection.service";
+import { PropertyDTO } from "@shared/models/properties/PropertyDTO";
+import { propertyMapping } from "./property-mappings";
+
+
+const converter = new SparqlResultConverter();
+
+@Injectable()
+export class PropertyService {
+
+    constructor(
+        private graphDbConnection: GraphDbConnectionService,
+    ) { }
+
+    async getAllProperties(): Promise<Array<PropertyDTO>> {
+        const queryString = `
+        PREFIX DINEN61360: <http://www.hsu-ifa.de/ontologies/DINEN61360#>
+
+        SELECT ?propertyInstance ?expressionGoal ?logicInterpretation ?value ?propertyType ?code ?definition ?unit WHERE {
+            ?propertyInstance a DINEN61360:Instance_Description;
+                DINEN61360:Expression_Goal ?expressionGoal;
+                DINEN61360:Logic_Interpretation ?logicInterpretation;
+                ^DINEN61360:has_Instance_Description ?dataElement.
+            OPTIONAL {
+                ?propertyInstance DINEN61360:Value ?value.
+            }
+            ?dataElement DINEN61360:has_Type_Description ?propertyType.
+            ?propertyType DINEN61360:Code ?code;
+                DINEN61360:Definition ?definition.
+            OPTIONAL {
+                ?propertyType DINEN61360:Unit_of_Measure ?unit.
+            }
+        }`;
+        const rawResult = await this.graphDbConnection.executeQuery(queryString);
+        const result = converter.convertToDefinition(rawResult.results.bindings, propertyMapping).getFirstRootElement() as Array<PropertyDTO>;
+        return result;
+    }
+
+    async getPropertyByIri(propertyIri: string): Promise<PropertyDTO>{
+        const queryString = `
+        PREFIX DINEN61360: <http://www.hsu-ifa.de/ontologies/DINEN61360#>
+
+        SELECT ?propertyInstance ?expressionGoal ?logicInterpretation ?value ?propertyType ?code ?definition ?unit WHERE {
+            ?propertyInstance a DINEN61360:Instance_Description;
+                DINEN61360:Expression_Goal ?expressionGoal;
+                DINEN61360:Logic_Interpretation ?logicInterpretation;
+                ^DINEN61360:has_Instance_Description ?dataElement.
+            OPTIONAL {
+                ?propertyInstance DINEN61360:Value ?value.
+            }
+            ?dataElement DINEN61360:has_Type_Description ?propertyType.
+            ?propertyType DINEN61360:Code ?code;
+                DINEN61360:Definition ?definition.
+            OPTIONAL {
+                ?propertyType DINEN61360:Unit_of_Measure ?unit.
+            }
+            FILTER(?propertyInstance = <${propertyIri}>)
+        }`;
+        const rawResult = await this.graphDbConnection.executeQuery(queryString);
+        const result = converter.convertToDefinition(rawResult.results.bindings, propertyMapping).getFirstRootElement()[0] as PropertyDTO;
+        return result;
+    }
+
+    async getInputPropertiesOfCapability(capabilityIri: string): Promise<Array<PropertyDTO>> {
+        const queryString = `
+        PREFIX DINEN61360: <http://www.hsu-ifa.de/ontologies/DINEN61360#>
+        PREFIX VDI3682: <http://www.hsu-ifa.de/ontologies/VDI3682#>
+
+        SELECT ?describedElementIri ?propertyInstance ?expressionGoal ?logicInterpretation ?value ?propertyTypeIri ?code ?definition ?unit WHERE {
+            <${capabilityIri}> VDI3682:hasInput ?describedElementIri.
+            ?describedElementIri DINEN61360:has_Data_Element ?dataElement.
+            ?propertyInstance a DINEN61360:Instance_Description;
+                DINEN61360:Expression_Goal ?expressionGoal;
+                DINEN61360:Logic_Interpretation ?logicInterpretation;
+                ^DINEN61360:has_Instance_Description ?dataElement.
+            OPTIONAL {
+                ?propertyInstance DINEN61360:Value ?value.
+            }
+            ?dataElement DINEN61360:has_Type_Description ?propertyTypeIri.
+            ?propertyTypeIri DINEN61360:Code ?code;
+                DINEN61360:Definition ?definition.
+            OPTIONAL {
+                ?propertyTypeIri DINEN61360:Unit_of_Measure ?unit.
+            }
+        }`;
+        const rawResult = await this.graphDbConnection.executeQuery(queryString);
+        const result = converter.convertToDefinition(rawResult.results.bindings, propertyMapping).getFirstRootElement() as Array<PropertyDTO>;
+        return result;
+    }
+
+}