feat(SmartdataDoc): add custom unique indexes

ts/smartdata.classes.collection.ts

@@ -31,6 +31,7 @@ export class SmartdataCollection<T> {
   objectValidation: IDocValidationFunc<T> = null;
   collectionName: string;
   smartdataDb: SmartdataDb;
+  uniqueIndexes: string[] = [];
 
   constructor(collectedClassArg: T & SmartDataDbDoc<T>, smartDataDbArg: SmartdataDb) {
     // tell the collection where it belongs
@@ -59,6 +60,21 @@ export class SmartdataCollection<T> {
     }
   }
 
+  /**
+   * mark unique index
+   */
+  markUniqueIndexes(keyArrayArg: string[] = []) {
+    for(let key of keyArrayArg) {
+      if(!this.uniqueIndexes.includes(key)) {
+        this.mongoDbCollection.createIndex(key, {
+          unique: true
+        });
+        // make sure we only call this once and not for every doc we create
+        this.uniqueIndexes.push(key);
+      }
+    }
+  }
+
   /**
    * adds a validation function that all newly inserted and updated objects have to pass
    */
@@ -81,6 +97,7 @@ export class SmartdataCollection<T> {
   async insert(dbDocArg: T & SmartDataDbDoc<T>): Promise<any> {
     await this.init();
     await this.checkDoc(dbDocArg);
+    this.markUniqueIndexes(dbDocArg.uniqueIndexes);
     const saveableObject = await dbDocArg.createSavableObject();
     console.log(saveableObject);
     const result = await this.mongoDbCollection.insertOne(saveableObject);

ts/smartdata.classes.doc.ts

@@ -12,7 +12,7 @@ export type TDocCreation = 'db' | 'new' | 'mixed';
  */
 export function svDb() {
   return (target: SmartDataDbDoc<any>, key: string) => {
-    console.log('called sva');
+    console.log(`called svDb() on ${key}`);
     if (!target.saveableProperties) {
       target.saveableProperties = [];
     }
@@ -20,6 +20,27 @@ export function svDb() {
   };
 }
 
+/**
+ * unique index - decorator to mark a unique index
+ */
+export function unI() {
+  return (target: SmartDataDbDoc<any>, key: string) => {
+    console.log('called unI');
+
+    // mark the index as unique
+    if (!target.uniqueIndexes) {
+      target.uniqueIndexes = [];
+    }
+    target.uniqueIndexes.push(key);
+
+    // and also save it
+    if (!target.saveableProperties) {
+      target.saveableProperties = [];
+    }
+    target.saveableProperties.push(key);
+  };
+} 
+
 export class SmartDataDbDoc<T> {
   /**
    * the collection object an Doc belongs to
@@ -31,6 +52,11 @@ export class SmartDataDbDoc<T> {
    */
   creationStatus: TDocCreation = 'new';
 
+  /**
+   * unique indexes
+   */
+  uniqueIndexes: string[];
+
   /**
    * an array of saveable properties of a doc
    */