feat: add snjs package

packages/snjs/lib/Application/Platforms.ts

@@ -0,0 +1,55 @@
+import { Environment, Platform } from '@standardnotes/services'
+
+export function platformFromString(string: string) {
+  const map: Record<string, Platform> = {
+    'mac-web': Platform.MacWeb,
+    'mac-desktop': Platform.MacDesktop,
+    'linux-web': Platform.LinuxWeb,
+    'linux-desktop': Platform.LinuxDesktop,
+    'windows-web': Platform.WindowsWeb,
+    'windows-desktop': Platform.WindowsDesktop,
+    ios: Platform.Ios,
+    android: Platform.Android,
+  }
+  return map[string]
+}
+
+export function platformToString(platform: Platform) {
+  const map = {
+    [Platform.MacWeb]: 'mac-web',
+    [Platform.MacDesktop]: 'mac-desktop',
+    [Platform.LinuxWeb]: 'linux-web',
+    [Platform.LinuxDesktop]: 'linux-desktop',
+    [Platform.WindowsWeb]: 'windows-web',
+    [Platform.WindowsDesktop]: 'windows-desktop',
+    [Platform.Ios]: 'ios',
+    [Platform.Android]: 'android',
+  }
+  return map[platform]
+}
+
+export function environmentFromString(string: string) {
+  const map: Record<string, Environment> = {
+    web: Environment.Web,
+    desktop: Environment.Desktop,
+    mobile: Environment.Mobile,
+  }
+  return map[string]
+}
+
+export function environmentToString(environment: Environment) {
+  const map = {
+    [Environment.Web]: 'web',
+    [Environment.Desktop]: 'desktop',
+    [Environment.Mobile]: 'mobile',
+  }
+  return map[environment]
+}
+
+export function isEnvironmentWebOrDesktop(environment: Environment) {
+  return environment === Environment.Web || environment === Environment.Desktop
+}
+
+export function isEnvironmentMobile(environment: Environment) {
+  return environment === Environment.Mobile
+}