feat: add personal dashboard

server/src/main/java/de/tum/cit/memo/controller/CompetencyRelationshipController.java

@@ -1,24 +1,23 @@
 package de.tum.cit.memo.controller;
 
-import de.tum.cit.memo.dto.CreateCompetencyRelationshipRequest;
 import de.tum.cit.memo.entity.CompetencyRelationship;
 import de.tum.cit.memo.service.CompetencyRelationshipService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
-import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
-import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 import java.util.List;
 
+/**
+ * Controller for competency relationship CRUD.
+ * For creating relationships and voting, use {@link SchedulingController}.
+ */
 @RestController
 @RequestMapping("/api/competency-relationships")
 @RequiredArgsConstructor
@@ -27,13 +26,6 @@ public class CompetencyRelationshipController {
 
     private final CompetencyRelationshipService relationshipService;
 
-    @PostMapping
-    @Operation(summary = "Create a new competency relationship")
-    public ResponseEntity<CompetencyRelationship> createRelationship(@Valid @RequestBody CreateCompetencyRelationshipRequest request) {
-        CompetencyRelationship relationship = relationshipService.createRelationship(request);
-        return ResponseEntity.status(HttpStatus.CREATED).body(relationship);
-    }
-
     @GetMapping("/{id}")
     @Operation(summary = "Get competency relationship by ID")
     public ResponseEntity<CompetencyRelationship> getRelationshipById(@PathVariable String id) {

server/src/main/java/de/tum/cit/memo/controller/ContributorStatsController.java

@@ -0,0 +1,29 @@
+package de.tum.cit.memo.controller;
+
+import de.tum.cit.memo.dto.ContributorStatsResponse;
+import de.tum.cit.memo.service.ContributorStatsService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/users")
+@RequiredArgsConstructor
+@Tag(name = "Contributor Stats", description = "Endpoints for contributor statistics and gamification")
+public class ContributorStatsController {
+
+    private final ContributorStatsService contributorStatsService;
+
+    @GetMapping("/{userId}/stats")
+    @Operation(summary = "Get contributor statistics", description = "Returns contribution stats including total votes, streaks, daily counts for heatmap, "
+            + "and earned badge IDs.")
+    public ResponseEntity<ContributorStatsResponse> getContributorStats(@PathVariable String userId) {
+        ContributorStatsResponse stats = contributorStatsService.getStats(userId);
+        return ResponseEntity.ok(stats);
+    }
+}

server/src/main/java/de/tum/cit/memo/controller/SchedulingController.java

@@ -0,0 +1,44 @@
+package de.tum.cit.memo.controller;
+
+import de.tum.cit.memo.dto.RelationshipTaskResponse;
+import de.tum.cit.memo.dto.VoteRequest;
+import de.tum.cit.memo.dto.VoteResponse;
+import de.tum.cit.memo.service.SchedulingService;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/scheduling")
+@RequiredArgsConstructor
+@Tag(name = "Scheduling", description = "Endpoints for competency mapping scheduling")
+public class SchedulingController {
+
+    private final SchedulingService schedulingService;
+
+    @GetMapping("/next-relationship")
+    @Operation(summary = "Get next relationship to vote on", description = "Returns a competency pair for the user to map. Uses coverage (70%) and consensus (30%) pipelines. Returns 204 if no tasks remain.")
+    public ResponseEntity<RelationshipTaskResponse> getNextRelationship(
+            @RequestHeader("X-User-Id") String userId) {
+        return schedulingService.getNextTask(userId)
+                .map(ResponseEntity::ok)
+                .orElse(ResponseEntity.noContent().build());
+    }
+
+    @PostMapping("/vote")
+    @Operation(summary = "Submit a vote on a relationship", description = "Records the user's vote on a competency relationship. Accepts either a relationshipId or originId+destinationId pair (for swapped direction). MATCHES and UNRELATED votes are bidirectional.")
+    public ResponseEntity<VoteResponse> submitVote(
+            @RequestHeader("X-User-Id") String userId,
+            @Valid @RequestBody VoteRequest request) {
+        VoteResponse response = schedulingService.submitVote(userId, request);
+        return ResponseEntity.ok(response);
+    }
+}

server/src/main/java/de/tum/cit/memo/dto/ContributorStatsResponse.java

@@ -0,0 +1,31 @@
+package de.tum.cit.memo.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDate;
+import java.util.List;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class ContributorStatsResponse {
+
+    private int totalVotes;
+    private int currentStreak;
+    private int longestStreak;
+    private List<DailyCount> dailyCounts;
+    private List<String> earnedBadges;
+
+    @Data
+    @Builder
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class DailyCount {
+        private LocalDate date;
+        private int count;
+    }
+}

server/src/main/java/de/tum/cit/memo/dto/RelationshipTaskResponse.java

@@ -0,0 +1,29 @@
+package de.tum.cit.memo.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class RelationshipTaskResponse {
+
+    private String relationshipId;
+    private CompetencyInfo origin;
+    private CompetencyInfo destination;
+    private String pipeline;
+    private VoteCounts currentVotes;
+
+    @Data
+    @Builder
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class CompetencyInfo {
+        private String id;
+        private String title;
+        private String description;
+    }
+}

server/src/main/java/de/tum/cit/memo/dto/VoteCounts.java

@@ -0,0 +1,18 @@
+package de.tum.cit.memo.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class VoteCounts {
+
+    private int assumes;
+    private int extendsRelation;
+    private int matches;
+    private int unrelated;
+}

server/src/main/java/de/tum/cit/memo/dto/VoteRequest.java

@@ -0,0 +1,36 @@
+package de.tum.cit.memo.dto;
+
+import de.tum.cit.memo.enums.RelationshipType;
+import jakarta.validation.constraints.NotNull;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class VoteRequest {
+
+    /**
+     * Relationship ID (used directly when direction is not swapped).
+     * Optional if originId + destinationId are provided instead.
+     */
+    private String relationshipId;
+
+    /**
+     * Origin competency ID (used when direction is swapped).
+     * Must be provided together with destinationId.
+     */
+    private String originId;
+
+    /**
+     * Destination competency ID (used when direction is swapped).
+     * Must be provided together with originId.
+     */
+    private String destinationId;
+
+    @NotNull(message = "Relationship type is required")
+    private RelationshipType relationshipType;
+}

server/src/main/java/de/tum/cit/memo/dto/VoteResponse.java

@@ -0,0 +1,17 @@
+package de.tum.cit.memo.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class VoteResponse {
+
+    private boolean success;
+    private VoteCounts updatedVotes;
+    private double newEntropy;
+}

server/src/main/java/de/tum/cit/memo/entity/Competency.java

@@ -35,4 +35,7 @@ public class Competency {
     @CreationTimestamp
     @Column(nullable = false, updatable = false)
     private Instant createdAt;
+
+    @Column(nullable = false)
+    private int degree;
 }