Score caching

squarenotsquare/src/realm/DbAPI.js

@@ -31,7 +31,7 @@ class DatabaseAPI {
   }
 
   getHighScores() {
-    return this.scoreRepo.getHighScores();
+    return this.scoreRepo.getCachedScores();
   }
 
   async initDB() {
@@ -39,6 +39,8 @@ class DatabaseAPI {
     this.systemRepo = repos.systemRepo;
     this.scoreRepo = repos.scoreRepo;
     this.userRepo = repos.userRepo;
+
+    this.scoreRepo.loadCache();
   }
 }
 

squarenotsquare/src/realm/repos/ScoreRepo.js

@@ -7,11 +7,31 @@ export default class ScoreRepo {
 
   constructor(db) {
     this.realmDB = db;
+    this.scoreCache = [];
+  }
+
+  updateScoreCache = (newScore) => {
+    this.scoreCache.push(newScore);
+    this.scoreCache.sort((a, b) => {
+      a.value < b.value
+    });
+
+    if (this.scoreCache.length > 99) {
+      this.scoreCache = this.scoreCache.slice(99, this.scoreCache.length - 1);
+    }
   }
 
   createScore = (user, score) => {
     let scoreID = uuidv4();
 
+    let newScore = {
+      id: scoreID,
+      user: user,
+      value: score
+    };
+
+    this.updateScoreCache(newScore);
+
     this.realmDB.write(() => {
       this.realmDB.create(
         ScoreEntity.name,
@@ -23,7 +43,7 @@ export default class ScoreRepo {
         true,
       );
     });
-  };
+  }
 
   getHighScores = () => {
     let score = this.realmDB.objects(ScoreEntity.name).sorted('value', true);
@@ -36,5 +56,13 @@ export default class ScoreRepo {
       highScores.push({user: row.user, value: row.value});
     });
     return highScores;
-  };
+  }
+
+  loadCache = () => {
+    this.scoreCache = this.getHighScores();
+  }
+
+  getCachedScores = () => {
+    return this.scoreCache;
+  }
 }