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| 1 | +import { createContext, useContext, useEffect, useState } from "react"; |
| 2 | + |
| 3 | +import { ResolvedTheme, Theme } from "@repo/ui/types-schemas"; |
| 4 | + |
| 5 | +type ThemeProviderProps = { |
| 6 | + children: React.ReactNode; |
| 7 | + defaultTheme?: Theme; |
| 8 | + storageKey?: string; |
| 9 | +}; |
| 10 | + |
| 11 | +type ThemeProviderState = { |
| 12 | + theme: Theme; |
| 13 | + setTheme: (theme: Theme) => void; |
| 14 | + resolvedTheme: ResolvedTheme; |
| 15 | +}; |
| 16 | + |
| 17 | +const initialState: ThemeProviderState = { |
| 18 | + theme: "system", |
| 19 | + setTheme: () => null, |
| 20 | + resolvedTheme: "light", |
| 21 | +}; |
| 22 | + |
| 23 | +const ThemeProviderContext = createContext<ThemeProviderState>(initialState); |
| 24 | + |
| 25 | +export const ThemeProvider = ({ |
| 26 | + children, |
| 27 | + defaultTheme = "system", |
| 28 | + storageKey = "vite-ui-theme", |
| 29 | + ...props |
| 30 | +}: ThemeProviderProps) => { |
| 31 | + const [theme, setTheme] = useState<Theme>( |
| 32 | + () => (localStorage.getItem(storageKey) as Theme) || defaultTheme, |
| 33 | + ); |
| 34 | + const [resolvedTheme, setResolvedTheme] = useState<ResolvedTheme>("light"); |
| 35 | + |
| 36 | + useEffect(() => { |
| 37 | + const root = window.document.documentElement; |
| 38 | + |
| 39 | + root.classList.remove("light", "dark"); |
| 40 | + |
| 41 | + let newTheme: ResolvedTheme; |
| 42 | + |
| 43 | + if (theme === "system") { |
| 44 | + newTheme = window.matchMedia("(prefers-color-scheme: dark)").matches |
| 45 | + ? "dark" |
| 46 | + : "light"; |
| 47 | + } else { |
| 48 | + newTheme = theme; |
| 49 | + } |
| 50 | + |
| 51 | + root.classList.add(newTheme); |
| 52 | + setResolvedTheme(newTheme); |
| 53 | + }, [theme]); |
| 54 | + |
| 55 | + const value = { |
| 56 | + theme, |
| 57 | + resolvedTheme, |
| 58 | + setTheme: (theme: Theme) => { |
| 59 | + localStorage.setItem(storageKey, theme); |
| 60 | + setTheme(theme); |
| 61 | + }, |
| 62 | + }; |
| 63 | + |
| 64 | + return ( |
| 65 | + <ThemeProviderContext.Provider {...props} value={value}> |
| 66 | + {children} |
| 67 | + </ThemeProviderContext.Provider> |
| 68 | + ); |
| 69 | +}; |
| 70 | + |
| 71 | +export const useTheme = () => { |
| 72 | + const context = useContext(ThemeProviderContext); |
| 73 | + |
| 74 | + if (context === undefined) |
| 75 | + throw new Error("useTheme must be used within a ThemeProvider"); |
| 76 | + |
| 77 | + return context; |
| 78 | +}; |
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