chore(sdk): move libraries from v2

Author: DoctorFTB

packages/sdk/package.json

@@ -34,6 +34,16 @@
                 "types": "./dist/schema.d.cts",
                 "default": "./dist/schema.cjs"
             }
+        },
+        "./local-helpers": {
+            "import": {
+                "types": "./dist/local-helpers.d.ts",
+                "default": "./dist/local-helpers.js"
+            },
+            "require": {
+                "types": "./dist/local-helpers.d.cts",
+                "default": "./dist/local-helpers.cjs"
+            }
         }
     },
     "dependencies": {

packages/sdk/src/local-helpers/index.ts

@@ -0,0 +1,4 @@
+export * from './is-plain-object';
+export * from './lower-case-first';
+export * from './upper-case-first';
+export * from './tiny-invariant';

packages/sdk/src/local-helpers/is-plain-object.ts

@@ -0,0 +1,23 @@
+function isObject(o: unknown) {
+    return Object.prototype.toString.call(o) === '[object Object]';
+}
+
+export function isPlainObject(o: unknown) {
+    if (isObject(o) === false) return false;
+
+    // If has modified constructor
+    const ctor = (o as { constructor: unknown }).constructor;
+    if (ctor === undefined) return true;
+
+    // If has modified prototype
+    const prot = (ctor as { prototype: unknown }).prototype;
+    if (isObject(prot) === false) return false;
+
+    // If constructor does not have an Object-specific method
+    if (Object.prototype.hasOwnProperty.call(prot, 'isPrototypeOf') === false) {
+        return false;
+    }
+
+    // Most likely a plain Object
+    return true;
+}

packages/sdk/src/local-helpers/lower-case-first.ts

@@ -0,0 +1,5 @@
+export function lowerCaseFirst(input: string) {
+    return input.charAt(0).toLowerCase() + input.slice(1);
+}
+
+export { lowerCaseFirst as uncapitalize };

packages/sdk/src/local-helpers/tiny-invariant.ts

@@ -0,0 +1,17 @@
+const isProduction = process.env['NODE_ENV'] === 'production';
+const prefix = 'Invariant failed';
+
+export function invariant(
+    condition: unknown,
+    message?: string,
+): asserts condition {
+    if (condition) {
+        return;
+    }
+
+    if (isProduction) {
+        throw new Error(prefix);
+    }
+
+    throw new Error(message ? `${prefix}: ${message}` : prefix);
+}

packages/sdk/src/local-helpers/upper-case-first.ts

@@ -0,0 +1,5 @@
+export function upperCaseFirst(input: string) {
+    return input.charAt(0).toUpperCase() + input.slice(1);
+}
+
+export { upperCaseFirst as capitalize };