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and,
asc,
desc,
eq,
gt,
inArray,
isNotNull,
isNull,
lt,
or,
type SQL,
sql,
} from "drizzle-orm";
import type { DrizzleD1Database } from "drizzle-orm/d1";
import type { NewWaConversation, WaConversation } from "../../db/schema";
import * as schema from "../../db/schema";
import { sanitizeSearchInput } from "../../lib/utils";
import { whatsappNumberVariants } from "../../lib/whatsapp/phone-variants";
export type WaConversationFilters = {
contactType?: string;
search?: string;
hasUnread?: boolean;
/** Contact has written to us at least once. */
hasCustomerReply?: boolean;
/** A human on our side has replied. Automated sends do not count. */
answeredByUs?: boolean;
/**
* Nothing outbound since their last inbound — the triage backlog.
*
* Distinct from both neighbours above: `hasCustomerReply` is "has ever
* written", `answeredByUs` is "has ever been answered". Neither means
* "is waiting right now", and `unreadCount` cannot stand in either — the
* inbox zeroes it the moment a conversation is selected, so merely looking
* at a thread would destroy the signal.
*
* Ordering follows: see {@link WaConversationsDal.findAll}.
*/
waitingOnUs?: boolean;
};
export class WaConversationsDal {
constructor(private db: DrizzleD1Database<typeof schema>) {}
/**
* Matches any spelling of the number (`91…`, `+91…`, ten digits, spaces).
* Where older duplicate rows exist for one number, the most recently
* active thread wins.
*/
async findByPhoneNumber(phone: string): Promise<WaConversation | undefined> {
const result = await this.db
.select()
.from(schema.waConversations)
.where(
inArray(
schema.waConversations.phoneNumber,
whatsappNumberVariants(phone),
),
)
.orderBy(desc(schema.waConversations.lastMessageAt))
.limit(1);
return result[0];
}
async findById(id: number): Promise<WaConversation | undefined> {
const result = await this.db
.select()
.from(schema.waConversations)
.where(eq(schema.waConversations.id, id))
.limit(1);
return result[0];
}
/**
* The waiting list is ordered oldest-inbound-first; everything else is
* ordered most-recently-active-first.
*
* Two branches rather than a `sort=` parameter, deliberately. On a triage
* screen a re-order can only hide the one row that matters, and the
* endpoint is paginated — sorting a page of 25 in the browser yields "the
* oldest of the newest 25", which is a different and wrong number.
*/
async findAll(
filters: WaConversationFilters = {},
offset = 0,
limit = 50,
): Promise<WaConversation[]> {
const conditions = this.buildConditions(filters);
const query = this.db
.select()
.from(schema.waConversations)
.orderBy(
filters.waitingOnUs
? asc(schema.waConversations.lastCustomerMessageAt)
: desc(schema.waConversations.lastMessageAt),
)
.limit(limit)
.offset(offset);
if (conditions.length > 0) {
return query.where(and(...conditions));
}
return query;
}
/**
* When the oldest unanswered contact wrote, or null on an empty backlog.
*
* Deliberately the first row of {@link findAll}'s waiting branch rather
* than a `min()` of its own: it is then provably the same conversation the
* inbox puts at the top, and the predicate is spelled once. The RRM
* ancestor of this query was rewritten after a second spelling of the
* condition, over a second table, shipped a badge that disagreed with the
* screen it sat next to.
*/
async oldestWaitingAt(): Promise<Date | null> {
const [oldest] = await this.findAll({ waitingOnUs: true }, 0, 1);
return oldest?.lastCustomerMessageAt ?? null;
}
async count(filters: WaConversationFilters = {}): Promise<number> {
const conditions = this.buildConditions(filters);
const query = this.db
.select({ count: sql<number>`count(*)` })
.from(schema.waConversations);
if (conditions.length > 0) {
const result = await query.where(and(...conditions));
return result[0]?.count ?? 0;
}
const result = await query;
return result[0]?.count ?? 0;
}
/** The Pros tab: every pro with a WhatsApp number, messaged or not. */
async findProInbox(
filters: WaConversationFilters,
offset: number,
limit: number,
) {
const c = schema.waConversations;
return this.db
.select({
conversation: c,
proId: schema.pros.id,
whatsapp: schema.pros.whatsapp,
})
.from(schema.pros)
.leftJoin(c, this.latestConversationOfPro())
.where(this.proInboxWhere(filters))
.orderBy(
sql`${c.lastMessageAt} IS NULL`,
desc(c.lastMessageAt),
asc(schema.pros.businessName),
)
.limit(limit)
.offset(offset);
}
async countProInbox(filters: WaConversationFilters): Promise<number> {
const result = await this.db
.select({ count: sql<number>`count(*)` })
.from(schema.pros)
.leftJoin(schema.waConversations, this.latestConversationOfPro())
.where(this.proInboxWhere(filters));
return result[0]?.count ?? 0;
}
/**
* The pro's most recently active conversation: one linked to them, or the
* one on their number. The number matters when two pros share one — it is
* one WhatsApp chat, linked to whichever pro it matched first, and both
* rows should show it. New conversations store 91 + the ten digits, which
* is what the second clause builds from the profile number. One row per
* pro even where old duplicates exist. Rides the pro and phone indexes.
*/
private latestConversationOfPro(): SQL {
return sql`${schema.waConversations.id} = (SELECT c2.id FROM wa_conversations c2 WHERE c2.pro_id = ${schema.pros.id} OR c2.phone_number = '91' || substr(replace(replace(${schema.pros.whatsapp}, '+', ''), ' ', ''), -10) ORDER BY c2.last_message_at DESC LIMIT 1)`;
}
private proInboxWhere(filters: WaConversationFilters) {
const { search, contactType: _, ...conversationFilters } = filters;
const conditions = [
isNotNull(schema.pros.whatsapp),
...this.buildConditions(conversationFilters),
];
if (search) {
const term = `%${sanitizeSearchInput(search)}%`;
conditions.push(
sql`(${schema.pros.businessName} LIKE ${term} OR ${schema.pros.whatsapp} LIKE ${term} OR ${schema.waConversations.contactName} LIKE ${term})`,
);
}
return and(...conditions);
}
async create(data: NewWaConversation): Promise<WaConversation> {
const result = await this.db
.insert(schema.waConversations)
.values(data)
.returning();
return result[0];
}
async update(
id: number,
data: Partial<WaConversation>,
): Promise<WaConversation | undefined> {
const result = await this.db
.update(schema.waConversations)
.set({ ...data, dateUpdated: new Date() })
.where(eq(schema.waConversations.id, id))
.returning();
return result[0];
}
/**
* Stamps the contact's latest message time, but only if the thread has had
* no message either way since `quietSince` (or none ever). A reply in a
* thread we wrote in is not a new chat. One conditional UPDATE, so of two
* webhook deliveries racing for the same new number, one wins.
*/
async claimNewChat(id: number, at: Date, quietSince: Date): Promise<boolean> {
const c = schema.waConversations;
const rows = await this.db
.update(c)
.set({ lastMessageAt: at, lastCustomerMessageAt: at })
.where(
and(
eq(c.id, id),
or(isNull(c.lastMessageAt), lt(c.lastMessageAt, quietSince)),
),
)
.returning({ id: c.id });
return rows.length > 0;
}
async incrementUnread(id: number): Promise<void> {
await this.db
.update(schema.waConversations)
.set({
unreadCount: sql`${schema.waConversations.unreadCount} + 1`,
dateUpdated: new Date(),
})
.where(eq(schema.waConversations.id, id));
}
async resetUnread(id: number): Promise<void> {
await this.db
.update(schema.waConversations)
.set({ unreadCount: 0, dateUpdated: new Date() })
.where(eq(schema.waConversations.id, id));
}
/**
* Previously returned a third count, `activeToday`, that no caller ever
* read — a query per dashboard load rendered nowhere, and a second
* UTC-midnight "today" boundary to get wrong. Day-scoped counts now live in
* WaMessagesDal and start at IST midnight (src/lib/ist-time.ts).
*/
async getStats(): Promise<{
total: number;
unread: number;
}> {
const [totalResult, unreadResult] = await Promise.all([
this.db
.select({ count: sql<number>`count(*)` })
.from(schema.waConversations),
this.db
.select({ count: sql<number>`count(*)` })
.from(schema.waConversations)
.where(gt(schema.waConversations.unreadCount, 0)),
]);
return {
total: totalResult[0]?.count ?? 0,
unread: unreadResult[0]?.count ?? 0,
};
}
private buildConditions(filters: WaConversationFilters) {
const conditions = [];
if (filters.contactType) {
conditions.push(
eq(
schema.waConversations.contactType,
filters.contactType as WaConversation["contactType"],
),
);
}
if (filters.search) {
const sanitized = sanitizeSearchInput(filters.search);
const searchTerm = `%${sanitized}%`;
conditions.push(
sql`(${schema.waConversations.phoneNumber} LIKE ${searchTerm} OR ${schema.waConversations.contactName} LIKE ${searchTerm})`,
);
}
if (filters.hasUnread) {
conditions.push(gt(schema.waConversations.unreadCount, 0));
}
// The conversation row already records this, so no join is needed. It is
// set by the inbound webhook, which is the only writer.
if (filters.hasCustomerReply) {
conditions.push(isNotNull(schema.waConversations.lastCustomerMessageAt));
}
// `sent_by` is what separates a human reply from an automated send —
// campaigns and other automated sends leave it null (see reply() in
// conversation.service.ts). Without that clause every conversation we
// ever sent a template to would count as answered.
//
// Raw sql rather than drizzle's exists() + a subquery builder, because
// that would need `this.db` and buildConditions is a pure function of its
// filters. The search clause above is raw sql for the same reason.
//
// The correlated subquery rides wa_messages_conversation_idx, so it is a
// per-row index seek rather than a scan.
if (filters.answeredByUs) {
conditions.push(
sql`EXISTS (SELECT 1 FROM ${schema.waMessages} WHERE ${schema.waMessages.conversationId} = ${schema.waConversations.id} AND ${schema.waMessages.direction} = 'outbound' AND ${schema.waMessages.sentBy} IS NOT NULL)`,
);
}
// Waiting on us = nothing outbound since their last inbound. Copied
// verbatim from the deleted services/rrm/unanswered.service.ts, which is
// the only place this condition has ever been correct — do not spell it a
// second way. Equal timestamps count as UNANSWERED on purpose:
// `date_created` is second-precision, and erring toward showing the row
// is the safe half.
//
// One table, no join. An automated send (campaign, notification adapter,
// ask-to-resend) leaves `last_message_at` alone, so a blast cannot make a
// waiting conversation look answered.
if (filters.waitingOnUs) {
conditions.push(
isNotNull(schema.waConversations.lastCustomerMessageAt),
sql`(${schema.waConversations.lastMessageAt} IS NULL OR ${schema.waConversations.lastMessageAt} <= ${schema.waConversations.lastCustomerMessageAt})`,
);
}
return conditions;
}
}
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