feat(core): implement @cascade directive

fixes #7
binier · Jul 17, 2020 · 9d8e71e · 9d8e71e
1 parent 3ed025c
commit 9d8e71e
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Showing 3 changed files with 11 additions and 1 deletion.
diff --git a/packages/core/src/directive/directive-builder.ts b/packages/core/src/directive/directive-builder.ts
@@ -4,6 +4,7 @@ import { DirectiveArgs, Directive } from './directive';
 
 export interface DirectiveBuilderArgs {
   filter: LogicalOperatorBuilder | OperatorBuilder;
+  cascade: undefined;
 }
 
 export class DirectiveBuilder<T extends keyof DirectiveBuilderArgs = any> {

diff --git a/packages/core/src/directive/directive.ts b/packages/core/src/directive/directive.ts
@@ -3,6 +3,7 @@ import { Param } from '../param';
 
 export interface DirectiveArgs {
   filter: LogicalOperator | Operator;
+  cascade: undefined;
 }
 
 export class Directive<T extends keyof DirectiveArgs = any> {
@@ -16,6 +17,8 @@ export class Directive<T extends keyof DirectiveArgs = any> {
   }
 
   params(): Param[] {
+    if (!this.hasArgs()) return [];
+
     return Array.isArray(this.args)
       ? this.args.reduce((r, x) => [...r, ...x.params()], [])
       : this.args.params();

diff --git a/packages/core/src/edge/edge-builder.ts b/packages/core/src/edge/edge-builder.ts
@@ -120,6 +120,11 @@ export class EdgeBuilder {
     return this;
   }
 
+  cascade() {
+    this.directives.cascade = new DirectiveBuilder('cascade', undefined);
+    return this;
+  }
+
   keyToField(key: string) {
     if (['id', 'uid'].includes(key))
       return 'uid';
@@ -153,7 +158,8 @@ export class EdgeBuilder {
       edges,
       directives: Object.entries(this.directives)
         .reduce((r, [k, v]) => {
-          r[k] = v.build(op => this.buildOp(op, pNameGen))
+          r[k] = v.build(op =>
+            !op ? op : this.buildOp(op, pNameGen));
           return r;
         }, {}),
       type: this.type,