Add stream targets

src/main/targets.ts

@@ -0,0 +1,35 @@
+export const flags = {
+  NO_CORS: 'no-cors',
+} as const;
+
+export type Flags = (typeof flags)[keyof typeof flags];
+
+export const targets = {
+  BROWSER: 'browser',
+  NATIVE: 'native',
+} as const;
+
+export type Targets = (typeof targets)[keyof typeof targets];
+
+export type FeatureMap = {
+  requires: readonly Flags[];
+};
+
+export const targetToFeatures: Record<Targets, FeatureMap> = {
+  browser: {
+    requires: [flags.NO_CORS],
+  },
+  native: {
+    requires: [],
+  },
+} as const;
+
+export function getTargetFeatures(target: Targets): FeatureMap {
+  return targetToFeatures[target];
+}
+
+export function flagsAllowedInFeatures(features: FeatureMap, inputFlags: Flags[]): boolean {
+  const hasAllFlags = features.requires.every((v) => inputFlags.includes(v));
+  if (!hasAllFlags) return false;
+  return true;
+}