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// Safe clipboard utilities with fallback mechanisms
export class ClipboardManager {
private static async checkClipboardPermission(): Promise<boolean> {
if (typeof window === "undefined" || !navigator.clipboard) {
return false
}
try {
const permission = await navigator.permissions.query({ name: "clipboard-write" as PermissionName })
return permission.state === "granted" || permission.state === "prompt"
} catch {
return false
}
}
private static fallbackCopy(text: string): Promise<boolean> {
return new Promise((resolve) => {
try {
const textArea = document.createElement("textarea")
textArea.value = text
textArea.style.position = "fixed"
textArea.style.left = "-999999px"
textArea.style.top = "-999999px"
document.body.appendChild(textArea)
textArea.focus()
textArea.select()
const successful = document.execCommand("copy")
document.body.removeChild(textArea)
resolve(successful)
} catch (error) {
console.error("Fallback copy failed:", error)
resolve(false)
}
})
}
static async copyToClipboard(text: string): Promise<{ success: boolean; method: string }> {
// Only attempt clipboard operations after user gesture
if (typeof window === "undefined") {
return { success: false, method: "server-side" }
}
// Try modern clipboard API first
if (navigator.clipboard && window.isSecureContext) {
try {
await navigator.clipboard.writeText(text)
return { success: true, method: "clipboard-api" }
} catch (error) {
console.warn("Clipboard API failed, trying fallback:", error)
}
}
// Fallback to execCommand
const fallbackSuccess = await this.fallbackCopy(text)
return {
success: fallbackSuccess,
method: fallbackSuccess ? "execCommand" : "failed",
}
}
static async readFromClipboard(): Promise<string | null> {
if (typeof window === "undefined" || !navigator.clipboard) {
return null
}
try {
const text = await navigator.clipboard.readText()
return text
} catch (error) {
console.warn("Clipboard read failed:", error)
return null
}
}
}
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