7 files changed, 275 insertions, 0 deletions
diff --git a/app_expo/utils/delay.ts b/app_expo/utils/delay.ts
new file mode 100644
index 0000000..6a2ef8d
--- /dev/null
+++ b/app_expo/utils/delay.ts
@@ -0,0 +1,6 @@
+/**
+ * A "modern" sleep statement.
+ *
+ * @param ms The number of milliseconds to wait.
+ */
+export const delay = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms))
diff --git a/app_expo/utils/ignore-warnings.ts b/app_expo/utils/ignore-warnings.ts
new file mode 100644
index 0000000..3d02efd
--- /dev/null
+++ b/app_expo/utils/ignore-warnings.ts
@@ -0,0 +1,10 @@
+/**
+ * Ignore some yellowbox warnings. Some of these are for deprecated functions
+ * that we haven't gotten around to replacing yet.
+ */
+import { LogBox } from 'react-native'
+
+// prettier-ignore
+LogBox.ignoreLogs([
+  "Require cycle:",
+])
diff --git a/app_expo/utils/keychain.ts b/app_expo/utils/keychain.ts
new file mode 100644
index 0000000..bcbc379
--- /dev/null
+++ b/app_expo/utils/keychain.ts
@@ -0,0 +1,63 @@
+import * as ReactNativeKeychain from 'react-native-keychain'
+
+/**
+ * Saves some credentials securely.
+ *
+ * @param username The username
+ * @param password The password
+ * @param server The server these creds are for.
+ */
+export async function save(username: string, password: string, server?: string) {
+  if (server) {
+    await ReactNativeKeychain.setInternetCredentials(server, username, password)
+    return true
+  } else {
+    return ReactNativeKeychain.setGenericPassword(username, password)
+  }
+}
+
+/**
+ * Loads credentials that were already saved.
+ *
+ * @param server The server that these creds are for
+ */
+export async function load(server?: string) {
+  if (server) {
+    const creds = await ReactNativeKeychain.getInternetCredentials(server)
+    return {
+      username: creds ? creds.username : null,
+      password: creds ? creds.password : null,
+      server,
+    }
+  } else {
+    const creds = await ReactNativeKeychain.getGenericPassword()
+    if (typeof creds === 'object') {
+      return {
+        username: creds.username,
+        password: creds.password,
+        server: null,
+      }
+    } else {
+      return {
+        username: null,
+        password: null,
+        server: null,
+      }
+    }
+  }
+}
+
+/**
+ * Resets any existing credentials for the given server.
+ *
+ * @param server The server which has these creds
+ */
+export async function reset(server?: string) {
+  if (server) {
+    await ReactNativeKeychain.resetInternetCredentials(server)
+    return true
+  } else {
+    const result = await ReactNativeKeychain.resetGenericPassword()
+    return result
+  }
+}
diff --git a/app_expo/utils/storage/index.ts b/app_expo/utils/storage/index.ts
new file mode 100644
index 0000000..69b61ec
--- /dev/null
+++ b/app_expo/utils/storage/index.ts
@@ -0,0 +1 @@
+export * from './storage'
diff --git a/app_expo/utils/storage/storage.test.ts b/app_expo/utils/storage/storage.test.ts
new file mode 100644
index 0000000..bb241c0
--- /dev/null
+++ b/app_expo/utils/storage/storage.test.ts
@@ -0,0 +1,39 @@
+import AsyncStorage from '@react-native-async-storage/async-storage'
+import { load, loadString, save, saveString, clear, remove } from './storage'
+
+// fixtures
+const VALUE_OBJECT = { x: 1 }
+const VALUE_STRING = JSON.stringify(VALUE_OBJECT)
+
+beforeEach(() => (AsyncStorage.getItem as jest.Mock).mockReturnValue(Promise.resolve(VALUE_STRING)))
+afterEach(() => jest.clearAllMocks())
+
+test('load', async () => {
+  const value = await load('something')
+  expect(value).toEqual(JSON.parse(VALUE_STRING))
+})
+
+test('loadString', async () => {
+  const value = await loadString('something')
+  expect(value).toEqual(VALUE_STRING)
+})
+
+test('save', async () => {
+  await save('something', VALUE_OBJECT)
+  expect(AsyncStorage.setItem).toHaveBeenCalledWith('something', VALUE_STRING)
+})
+
+test('saveString', async () => {
+  await saveString('something', VALUE_STRING)
+  expect(AsyncStorage.setItem).toHaveBeenCalledWith('something', VALUE_STRING)
+})
+
+test('remove', async () => {
+  await remove('something')
+  expect(AsyncStorage.removeItem).toHaveBeenCalledWith('something')
+})
+
+test('clear', async () => {
+  await clear()
+  expect(AsyncStorage.clear).toHaveBeenCalledWith()
+})
diff --git a/app_expo/utils/storage/storage.ts b/app_expo/utils/storage/storage.ts
new file mode 100644
index 0000000..659e738
--- /dev/null
+++ b/app_expo/utils/storage/storage.ts
@@ -0,0 +1,79 @@
+import AsyncStorage from '@react-native-async-storage/async-storage'
+
+/**
+ * Loads a string from storage.
+ *
+ * @param key The key to fetch.
+ */
+export async function loadString(key: string): Promise<string | null> {
+  try {
+    return await AsyncStorage.getItem(key)
+  } catch {
+    // not sure why this would fail... even reading the RN docs I'm unclear
+    return null
+  }
+}
+
+/**
+ * Saves a string to storage.
+ *
+ * @param key The key to fetch.
+ * @param value The value to store.
+ */
+export async function saveString(key: string, value: string): Promise<boolean> {
+  try {
+    await AsyncStorage.setItem(key, value)
+    return true
+  } catch {
+    return false
+  }
+}
+
+/**
+ * Loads something from storage and runs it thru JSON.parse.
+ *
+ * @param key The key to fetch.
+ */
+export async function load(key: string): Promise<any | null> {
+  try {
+    const almostThere = await AsyncStorage.getItem(key)
+    return JSON.parse(almostThere)
+  } catch {
+    return null
+  }
+}
+
+/**
+ * Saves an object to storage.
+ *
+ * @param key The key to fetch.
+ * @param value The value to store.
+ */
+export async function save(key: string, value: any): Promise<boolean> {
+  try {
+    await AsyncStorage.setItem(key, JSON.stringify(value))
+    return true
+  } catch {
+    return false
+  }
+}
+
+/**
+ * Removes something from storage.
+ *
+ * @param key The key to kill.
+ */
+export async function remove(key: string): Promise<void> {
+  try {
+    await AsyncStorage.removeItem(key)
+  } catch {}
+}
+
+/**
+ * Burn it all to the ground.
+ */
+export async function clear(): Promise<void> {
+  try {
+    await AsyncStorage.clear()
+  } catch {}
+}
diff --git a/app_expo/utils/validate.ts b/app_expo/utils/validate.ts
new file mode 100644
index 0000000..838c0c1
--- /dev/null
+++ b/app_expo/utils/validate.ts
@@ -0,0 +1,77 @@
+const ValidateJS = require('validate.js')
+
+// HACK(steve): wierd typescript situation because of strange typings
+const Validate: any = ValidateJS.default ? ValidateJS.default : ValidateJS
+
+/**
+ * Validates that 1 attribute doesn't appear in another's attributes content.
+ */
+Validate.validators.excludes = function custom(value, options, key, attributes) {
+  const list = attributes[options.attribute] || []
+  if (value && list.includes(value)) {
+    return options.message || `${value} is in the list`
+  }
+}
+
+/**
+ * Validates that another attribute isn't true.
+ */
+Validate.validators.tripped = function custom(value, options, key, attributes) {
+  if (value && attributes[options.attribute] === true) {
+    return options.message || `${options.attribute} is true`
+  }
+}
+
+/**
+ * Defines the rules for validating.
+ *
+ * Example:
+ * ```ts
+ * const RULES = {
+ *   favoriteBand: {
+ *     inclusion: { ['Weezer', 'Other'], message: 'Pick wisely.' }
+ *   },
+ *   name: {
+ *     presence: { message: 'A developer has no name?' }
+ *   }
+ * }
+ * validate(RULES, {})
+ * ```
+ *
+ * See https://validatejs.org/#validators for more examples.
+ *
+ */
+export interface ValidationRules {
+  [key: string]: Record<string, unknown>
+}
+
+/**
+ * An object containing any errors found.
+ *
+ * Example:
+ * ```js
+ * {
+ *   email: ['Invalid email address.'],
+ *   password: [
+ *     'Password must be 6 characters.',
+ *     'Password must have at least 1 digit.'
+ *   ]
+ * }
+ * ```
+ */
+export interface ValidationErrors {
+  [key: string]: string[]
+}
+
+/**
+ * Runs the given rules against the data object.
+ *
+ * @param rules The rules to apply.
+ * @param data The object to validate.
+ */
+export function validate(rules: ValidationRules, data: Record<string, unknown>): ValidationErrors {
+  if (typeof data !== 'object') {
+    return {} as ValidationErrors
+  }
+  return Validate(data, rules, { fullMessages: false }) || {}
+}