feat(frontend): add initial frontend structure with components, services, and assets

frontend/components/ui/use-toast.ts

@@ -0,0 +1,179 @@
+"use client"
+
+import type React from "react"
+
+// Adapted from https://github.com/shadcn-ui/ui/blob/main/apps/www/registry/default/ui/use-toast.ts
+import { useState, useEffect } from "react"
+
+import type { ToastActionElement, ToastProps } from "@/components/ui/toast"
+
+const TOAST_LIMIT = 5
+const TOAST_REMOVE_DELAY = 3000
+
+type ToasterToast = ToastProps & {
+  id: string
+  title?: React.ReactNode
+  description?: React.ReactNode
+  action?: ToastActionElement
+}
+
+const actionTypes = {
+  ADD_TOAST: "ADD_TOAST",
+  UPDATE_TOAST: "UPDATE_TOAST",
+  DISMISS_TOAST: "DISMISS_TOAST",
+  REMOVE_TOAST: "REMOVE_TOAST",
+} as const
+
+let count = 0
+
+function genId() {
+  count = (count + 1) % Number.MAX_VALUE
+  return count.toString()
+}
+
+type ActionType = typeof actionTypes
+
+type Action =
+  | {
+      type: ActionType["ADD_TOAST"]
+      toast: ToasterToast
+    }
+  | {
+      type: ActionType["UPDATE_TOAST"]
+      toast: Partial<ToasterToast>
+    }
+  | {
+      type: ActionType["DISMISS_TOAST"]
+      toastId?: string
+    }
+  | {
+      type: ActionType["REMOVE_TOAST"]
+      toastId?: string
+    }
+
+interface State {
+  toasts: ToasterToast[]
+}
+
+const toastTimeouts = new Map<string, ReturnType<typeof setTimeout>>()
+
+const reducer = (state: State, action: Action): State => {
+  switch (action.type) {
+    case actionTypes.ADD_TOAST:
+      return {
+        ...state,
+        toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT),
+      }
+
+    case actionTypes.UPDATE_TOAST:
+      return {
+        ...state,
+        toasts: state.toasts.map((t) => (t.id === action.toast.id ? { ...t, ...action.toast } : t)),
+      }
+
+    case actionTypes.DISMISS_TOAST: {
+      const { toastId } = action
+
+      // ! Side effects ! - This could be extracted into a dismissToast() action,
+      // but I'll keep it here for simplicity
+      if (toastId) {
+        if (toastTimeouts.has(toastId)) {
+          clearTimeout(toastTimeouts.get(toastId))
+          toastTimeouts.delete(toastId)
+        }
+      } else {
+        for (const [id, timeout] of toastTimeouts.entries()) {
+          clearTimeout(timeout)
+          toastTimeouts.delete(id)
+        }
+      }
+
+      return {
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === toastId || toastId === undefined
+            ? {
+                ...t,
+                open: false,
+              }
+            : t,
+        ),
+      }
+    }
+    case actionTypes.REMOVE_TOAST:
+      if (action.toastId === undefined) {
+        return {
+          ...state,
+          toasts: [],
+        }
+      }
+      return {
+        ...state,
+        toasts: state.toasts.filter((t) => t.id !== action.toastId),
+      }
+  }
+}
+
+const listeners: Array<(state: State) => void> = []
+
+let memoryState: State = { toasts: [] }
+
+function dispatch(action: Action) {
+  memoryState = reducer(memoryState, action)
+  listeners.forEach((listener) => {
+    listener(memoryState)
+  })
+}
+
+type Toast = Omit<ToasterToast, "id">
+
+function toast({ ...props }: Toast) {
+  const id = genId()
+
+  const update = (props: ToasterToast) =>
+    dispatch({
+      type: actionTypes.UPDATE_TOAST,
+      toast: { ...props, id },
+    })
+  const dismiss = () => dispatch({ type: actionTypes.DISMISS_TOAST, toastId: id })
+
+  dispatch({
+    type: actionTypes.ADD_TOAST,
+    toast: {
+      ...props,
+      id,
+      open: true,
+      onOpenChange: (open) => {
+        if (!open) dismiss()
+      },
+    },
+  })
+
+  return {
+    id: id,
+    dismiss,
+    update,
+  }
+}
+
+function useToast() {
+  const [state, setState] = useState<State>(memoryState)
+
+  useEffect(() => {
+    listeners.push(setState)
+    return () => {
+      const index = listeners.indexOf(setState)
+      if (index > -1) {
+        listeners.splice(index, 1)
+      }
+    }
+  }, [state])
+
+  return {
+    ...state,
+    toast,
+    dismiss: (toastId?: string) => dispatch({ type: actionTypes.DISMISS_TOAST, toastId }),
+  }
+}
+
+export { useToast, toast }