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import { Clock, FileText, Lock, Send } from "lucide-react";
import { cn } from "../../lib/utils";
import { Button } from "../ui/button";
import { Select } from "../ui/select";
import { Textarea } from "../ui/textarea";
import {
STATUS_BAND_TINT,
STATUS_CODE_TYPE,
STATUS_INK,
} from "../ui/status-ink";
import type { WaConversation, WaTemplate } from "../../lib/api/whatsapp";
import { TemplateParameterFields } from "./TemplateParameterFields";
import {
buildSendComponents,
extractParameterSlots,
isApprovedTemplate,
parseTemplateComponents,
} from "../../lib/whatsapp/template";
import {
appendQuickReply,
firstLine,
QUICK_REPLIES,
QUICK_REPLY_ORDER,
} from "../../lib/whatsapp/quick-replies";
import {
formatRemainingLong,
formatRemainingShort,
REPLY_WINDOW_HOURS,
replyWindowExpiry,
} from "../../lib/whatsapp/triage";
/**
* The composer, with Meta's 24-hour rule STATED rather than inferred.
*
* WHAT CHANGED AND WHY IT MATTERS
* This used to recompute the window locally and print a banner once it had
* already closed — no countdown, no statement of how much time was left. The
* deadline governs whether a plain reply is LEGAL (the API refuses a late one;
* Meta rejects it with 131047), so the page must say how long is left while
* there is still time to act, and the figure must come from
* `windowExpiresAt` on the detail response rather than from the browser clock.
* `now` is passed in so the countdown ticks on the page's one clock and every
* figure on screen agrees.
*
* QUICK REPLIES INSERT, THEY NEVER SEND
* Tapping a chip appends its body below whatever is already in the draft, with
* a blank line between, and leaves the cursor in the operator's hands. A chip
* that sent on one tap would have no review step, and a message that has
* already left is the one thing that cannot be taken back. The chips are
* therefore absent entirely when the window is closed: that branch cannot send
* free-form text at all, so offering a draft affordance would be a dead end.
*/
export type ReplyBoxProps = {
conversation: WaConversation;
/** Server-owned deadline. Null means closed; never a past instant. */
windowExpiresAt?: string | null;
templates: WaTemplate[];
onSendText: (message: string) => void;
onSendTemplate: (
templateName: string,
language: string,
components?: unknown[],
) => void;
isSending: boolean;
now: Date;
};
export function ReplyBox({
conversation,
windowExpiresAt,
templates,
onSendText,
onSendTemplate,
isSending,
now,
}: ReplyBoxProps) {
const [message, setMessage] = useState("");
const [selectedTemplate, setSelectedTemplate] = useState("");
const [paramValues, setParamValues] = useState<Record<string, string>>({});
const expiry = replyWindowExpiry(
windowExpiresAt,
conversation.lastCustomerMessageAt,
now,
);
const windowOpen = expiry !== null;
const approvedTemplates = templates.filter(isApprovedTemplate);
const currentTemplate = approvedTemplates.find(
(t) => t.name === selectedTemplate,
);
const templateComponents = currentTemplate
? parseTemplateComponents(currentTemplate.components)
: [];
const slots = extractParameterSlots(templateComponents);
const hasVariables = slots.length > 0;
const allParamsFilled =
!hasVariables ||
slots.every((s) => paramValues[`${s.componentType}_${s.index}`]?.trim());
const handleSendText = () => {
const text = message.trim();
Iif (!text) return;
onSendText(text);
setMessage("");
};
const handleSendTemplate = () => {
Iif (!selectedTemplate || !currentTemplate) return;
Iif (hasVariables && !allParamsFilled) return;
const components = hasVariables
? buildSendComponents(templateComponents, paramValues)
: undefined;
onSendTemplate(currentTemplate.name, currentTemplate.language, components);
setSelectedTemplate("");
setParamValues({});
};
const handleKeyDown = (e: React.KeyboardEvent) => {
if (e.key === "Enter" && !e.shiftKey) {
e.preventDefault();
handleSendText();
}
};
const handleTemplateChange = (name: string) => {
setSelectedTemplate(name);
setParamValues({});
};
return (
<div className="border-t border-border-default">
{windowOpen ? (
<>
<div
className={cn(
"flex flex-wrap items-center gap-x-2 gap-y-1 border-b border-border-default px-4 py-1.5",
STATUS_BAND_TINT.info,
)}
>
<Clock
aria-hidden="true"
className={cn("h-4 w-4 shrink-0", STATUS_INK.info)}
/>
<span className={cn(STATUS_CODE_TYPE, STATUS_INK.info)}>
Reply window open
</span>
<span aria-hidden="true" className="text-foreground-subtle">
·
</span>
<span className={cn(STATUS_CODE_TYPE, "text-foreground-default")}>
<span aria-hidden="true">
{formatRemainingShort(expiry, now)} left
</span>
<span className="sr-only">
{formatRemainingLong(expiry, now)} left
</span>
</span>
<span className="ml-auto hidden text-xs text-foreground-subtle sm:block">
Free-form replies close {REPLY_WINDOW_HOURS} hours after their
last message
</span>
</div>
<div className="p-3">
<label className="sr-only" htmlFor="wa-reply">
Reply to{" "}
{conversation.contactName || conversation.phoneNumber}
</label>
<Textarea
id="wa-reply"
rows={3}
value={message}
onChange={(e) => setMessage(e.target.value)}
onKeyDown={handleKeyDown}
placeholder="Type a reply…"
/>
<div className="mt-2 flex flex-wrap items-center gap-1.5">
<span
className={cn(STATUS_CODE_TYPE, "text-foreground-muted")}
>
Quick
</span>
{QUICK_REPLY_ORDER.map((key) => {
const reply = QUICK_REPLIES[key];
return (
<button
key={key}
type="button"
// The operator can read what a chip will put in the
// draft before pressing it.
title={firstLine(reply.body)}
onClick={() =>
setMessage((draft) =>
appendQuickReply(draft, reply.body),
)
}
className={cn(
"h-6 rounded-sm border border-border-default px-1.5 text-foreground-muted transition-colors hover:border-border-strong hover:text-foreground-default focus-visible:ring-2 focus-visible:ring-primary-500 focus-visible:outline-none pointer-coarse:min-h-11",
STATUS_CODE_TYPE,
)}
>
{reply.label}
</button>
);
})}
<Button
type="button"
size="sm"
onClick={handleSendText}
disabled={!message.trim() || isSending}
className="ml-auto"
>
<Send aria-hidden="true" />
Send
</Button>
</div>
</div>
</>
) : (
<>
<div
className={cn(
"flex flex-wrap items-start gap-2 border-b border-border-default px-4 py-2",
STATUS_BAND_TINT.warning,
)}
>
<Lock
aria-hidden="true"
className={cn("mt-0.5 h-4 w-4 shrink-0", STATUS_INK.warning)}
/>
<span className={cn(STATUS_CODE_TYPE, STATUS_INK.warning)}>
Reply window closed
</span>
{/* Name the consequence, not the rule. */}
<p className="min-w-0 text-xs text-foreground-default">
Only an approved template can reach this person now — the API
will refuse a plain reply.
</p>
</div>
<div className="space-y-3 p-3">
<div className="flex items-center gap-2">
<FileText
aria-hidden="true"
className="h-4 w-4 shrink-0 text-foreground-muted"
/>
<label className="sr-only" htmlFor="wa-template">
Approved template to send
</label>
<Select
id="wa-template"
tier="dense"
value={selectedTemplate}
onChange={(e) => handleTemplateChange(e.target.value)}
placeholder="Select a template…"
options={approvedTemplates.map((t) => ({
value: t.name,
label: `${t.name} (${t.language})`,
}))}
/>
<Button
type="button"
size="sm"
onClick={handleSendTemplate}
disabled={
!selectedTemplate ||
isSending ||
(hasVariables && !allParamsFilled)
}
aria-label="Send template"
className="shrink-0"
>
<Send aria-hidden="true" />
</Button>
</div>
{currentTemplate && (
<div className="max-h-64 overflow-y-auto">
<TemplateParameterFields
template={currentTemplate}
paramValues={paramValues}
onParamChange={(key, value) =>
setParamValues((prev) => ({ ...prev, [key]: value }))
}
/>
</div>
)}
</div>
</>
)}
</div>
);
}
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