initial commit

2024-06-01 16:32:44 +02:00
commit 127ae6abd9
4 changed files with 201 additions and 0 deletions
--- a/inject.ts
+++ b/inject.ts
@@ -0,0 +1,95 @@
+/**
+ * Take a function and the first(s) parameter(s) to inject.
+ * Return a function that don't need those parameters.
+ *
+ * Example:
+ * ```
+ * function myFunc(a, b, c) {
+ *   // ...
+ * }
+ *
+ * const injected = inject(myFunc, "A", "B");
+ * injected("C"); // same result as myFunc("A", "B", "C")
+ * ```
+ */
+export function inject<P1, OtherParams extends any[], Result>(
+  subject: (p1: P1, ...params: OtherParams) => Result,
+  p1: P1,
+): (...params: OtherParams) => Result;
+export function inject<P1, P2, OtherParams extends any[], Result>(
+  subject: (p1: P1, p2: P2, ...params: OtherParams) => Result,
+  p1: P1,
+  p2: P2,
+): (...params: OtherParams) => Result;
+export function inject<P1, P2, P3, OtherParams extends any[], Result>(
+  subject: (p1: P1, p2: P2, p3: P3, ...params: OtherParams) => Result,
+  p1: P1,
+  p2: P2,
+  p3: P3,
+): (...params: OtherParams) => Result;
+export function inject<P1, P2, P3, P4, OtherParams extends any[], Result>(
+  subject: (p1: P1, p2: P2, p3: P3, p4: P4, ...params: OtherParams) => Result,
+  p1: P1,
+  p2: P2,
+  p3: P3,
+  p4: P4,
+): (...params: OtherParams) => Result;
+export function inject<P1, P2, P3, P4, P5, OtherParams extends any[], Result>(
+  subject: (p1: P1, p2: P2, p3: P3, p4: P4, p5: P5, ...params: OtherParams) => Result,
+  p1: P1,
+  p2: P2,
+  p3: P3,
+  p4: P4,
+  p5: P5,
+): (...params: OtherParams) => Result;
+export function inject<P1, P2, P3, P4, P5, P6, OtherParams extends any[], Result>(
+  subject: (p1: P1, p2: P2, p3: P3, p4: P4, p5: P5, p6: P6, ...params: OtherParams) => Result,
+  p1: P1,
+  p2: P2,
+  p3: P3,
+  p4: P4,
+  p5: P5,
+  p6: P6,
+): (...params: OtherParams) => Result;
+export function inject<P1, P2, P3, P4, P5, P6, P7, OtherParams extends any[], Result>(
+  subject: (p1: P1, p2: P2, p3: P3, p4: P4, p5: P5, p6: P6, p7: P7, ...params: OtherParams) => Result,
+  p1: P1,
+  p2: P2,
+  p3: P3,
+  p4: P4,
+  p5: P5,
+  p6: P6,
+  p7: P7,
+): (...params: OtherParams) => Result;
+export function inject<P1, P2, P3, P4, P5, P6, P7, P8, OtherParams extends any[], Result>(
+  subject: (p1: P1, p2: P2, p3: P3, p4: P4, p5: P5, p6: P6, p7: P7, p8: P8, ...params: OtherParams) => Result,
+  p1: P1,
+  p2: P2,
+  p3: P3,
+  p4: P4,
+  p5: P5,
+  p6: P6,
+  p7: P7,
+  p8: P8,
+): (...params: OtherParams) => Result;
+export function inject<P1, P2, P3, P4, P5, P6, P7, P8, P9, OtherParams extends any[], Result>(
+  subject: (p1: P1, p2: P2, p3: P3, p4: P4, p5: P5, p6: P6, p7: P7, p8: P8, p9: P9, ...params: OtherParams) => Result,
+  p1: P1,
+  p2: P2,
+  p3: P3,
+  p4: P4,
+  p5: P5,
+  p6: P6,
+  p7: P7,
+  p8: P8,
+  p9: P9,
+): (...params: OtherParams) => Result;
+export function inject<FirstParam, OtherParams extends any[], Result>(
+  subject: (first: FirstParam, ...params: OtherParams) => Result,
+  ...paramsToInject: any[]
+) {
+  return paramsToInject.reduce((functionToInjext, paramToInject) => {
+    return (...params: OtherParams) =>
+      functionToInjext(paramToInject, ...params);
+  }, subject) as (...param: OtherParams) => Result;
+}