117616: Ported unique-decorators rule

docs/lint/ts/index.md

@@ -6,3 +6,4 @@ _______
 - [`dspace-angular-ts/themed-component-selectors`](./rules/themed-component-selectors.md): Themeable component selectors should follow the DSpace convention
 - [`dspace-angular-ts/themed-component-usages`](./rules/themed-component-usages.md): Themeable components should be used via their `ThemedComponent` wrapper class
 - [`dspace-angular-ts/themed-wrapper-no-input-defaults`](./rules/themed-wrapper-no-input-defaults.md): ThemedComponent wrappers should not declare input defaults (see [DSpace Angular #2164](https://github.com/DSpace/dspace-angular/pull/2164))
+- [`dspace-angular-ts/unique-decorators`](./rules/unique-decorators.md): Some decorators must be called with unique arguments (e.g. when they construct a mapping based on the argument values)

docs/lint/ts/rules/unique-decorators.md

@@ -0,0 +1,73 @@
+[DSpace ESLint plugins](../../../../lint/README.md) > [TypeScript rules](../index.md) > `dspace-angular-ts/unique-decorators`
+_______
+
+Some decorators must be called with unique arguments (e.g. when they construct a mapping based on the argument values)
+
+_______
+
+[Source code](../../../../lint/src/rules/ts/unique-decorators.ts)
+
+### Examples
+
+
+#### Valid code
+    
+##### checked decorator, no repetitions
+        
+```typescript
+@listableObjectComponent(a)
+export class A {
+}
+
+@listableObjectComponent(a, 'b')
+export class B {
+}
+
+@listableObjectComponent(a, 'b', 3)
+export class C {
+}
+
+@listableObjectComponent(a, 'b', 3, Enum.TEST1)
+export class C {
+}
+
+@listableObjectComponent(a, 'b', 3, Enum.TEST2)
+export class C {
+}
+```
+    
+##### unchecked decorator, some repetitions
+        
+```typescript
+@something(a)
+export class A {
+}
+
+@something(a)
+export class B {
+}
+```
+    
+
+
+
+#### Invalid code 
+    
+##### checked decorator, some repetitions
+        
+```typescript
+@listableObjectComponent(a)
+export class A {
+}
+
+@listableObjectComponent(a)
+export class B {
+}
+```
+Will produce the following error(s):
+```
+Duplicate decorator call
+```
+        
+    
+