feat: letters added
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gosangam
+249
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/**
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* Data access layer for Letters.
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*
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* Provides queries for browsing letters by year, recipient, and location.
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* Uses the Prisma Letter model (collection: letters).
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*
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* Recipients are stored as an array (e.g., ["Mukunda", "Janaki"]).
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* The recipient list aggregates individual names across all letters,
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* and searching for "Mukunda" finds all letters where Mukunda is
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* ANY recipient (individual or group).
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*/
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import { prisma } from "@/lib/db";
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// Types
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export type LetterSummary = {
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slug: string;
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recipients: string[];
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recipientDisplay: string;
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date: string | null;
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year: number | null;
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month: number | null;
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location: string | null;
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};
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export type LetterFull = {
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slug: string;
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recipients: string[];
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recipientDisplay: string;
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date: string | null;
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dateRef: string | null;
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year: number | null;
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month: number | null;
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day: number | null;
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location: string | null;
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salutation: string | null;
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paragraphs: string[];
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};
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export type YearGroup = {
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year: number;
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count: number;
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};
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export type RecipientGroup = {
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name: string;
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count: number;
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};
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export type LocationGroup = {
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name: string;
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count: number;
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};
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// Sanitize
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function sanitizeHtml(html: string): string {
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let clean = html.replace(/<script[\s>][\s\S]*?<\/script>/gi, "");
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clean = clean.replace(/<style[\s>][\s\S]*?<\/style>/gi, "");
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clean = clean.replace(/<iframe[\s>][\s\S]*?<\/iframe>/gi, "");
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clean = clean.replace(
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/<\/?(?:script|style|iframe|object|embed|form|input|textarea|select|button)[^>]*>/gi,
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"",
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);
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clean = clean.replace(/\s+on\w+\s*=\s*(?:"[^"]*"|'[^']*'|[^\s>]+)/gi, "");
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return clean;
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}
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// --- Index/overview queries ---
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export async function getLetterYears(): Promise<YearGroup[]> {
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const letters = await prisma.letter.findMany({
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where: { year: { not: null } },
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select: { year: true },
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});
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const counts: Record<number, number> = {};
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for (const l of letters) {
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if (l.year) {
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counts[l.year] = (counts[l.year] || 0) + 1;
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}
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}
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return Object.entries(counts)
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.map(([year, count]) => ({ year: Number(year), count }))
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.filter((g) => g.year >= 1940 && g.year <= 1980)
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.sort((a, b) => a.year - b.year);
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}
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/**
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* Get all unique individual recipients with letter counts.
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*
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* Each letter has a `recipients` array (e.g., ["Mukunda", "Janaki"]).
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* This function aggregates across all letters so that "Mukunda" appears
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* once with count = total letters where Mukunda is ANY recipient.
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*/
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export async function getLetterRecipients(): Promise<RecipientGroup[]> {
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const letters = await prisma.letter.findMany({
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select: { recipients: true },
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});
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const counts: Record<string, number> = {};
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for (const l of letters) {
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for (const r of l.recipients) {
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counts[r] = (counts[r] || 0) + 1;
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}
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}
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return Object.entries(counts)
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.map(([name, count]) => ({ name, count }))
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.sort((a, b) => b.count - a.count);
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}
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export async function getLetterLocations(): Promise<LocationGroup[]> {
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const letters = await prisma.letter.findMany({
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where: { location: { not: null } },
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select: { location: true },
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});
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const counts: Record<string, number> = {};
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for (const l of letters) {
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if (l.location) {
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counts[l.location] = (counts[l.location] || 0) + 1;
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}
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}
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return Object.entries(counts)
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.map(([name, count]) => ({ name, count }))
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.sort((a, b) => b.count - a.count);
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}
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// --- Letter list queries ---
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export async function getLettersByYear(year: number): Promise<LetterSummary[]> {
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const letters = await prisma.letter.findMany({
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where: { year },
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orderBy: [{ month: "asc" }, { day: "asc" }],
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select: {
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slug: true,
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recipients: true,
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recipientDisplay: true,
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date: true,
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year: true,
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month: true,
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location: true,
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},
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});
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return letters;
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}
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/**
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* Get all letters where the given name is ANY recipient.
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*
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* Uses Prisma's `has` filter on the recipients array.
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* Searching for "Mukunda" returns letters addressed to:
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* - "Mukunda" (individual)
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* - "Mukunda, Janaki" (group containing Mukunda)
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* - "Yamuna, Mukunda, Syamasundara" (group containing Mukunda)
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*/
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export async function getLettersByRecipient(
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recipient: string,
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): Promise<LetterSummary[]> {
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const letters = await prisma.letter.findMany({
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where: { recipients: { has: recipient } },
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orderBy: [{ year: "asc" }, { month: "asc" }, { day: "asc" }],
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select: {
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slug: true,
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recipients: true,
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recipientDisplay: true,
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date: true,
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year: true,
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month: true,
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location: true,
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},
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});
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return letters;
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}
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export async function getLettersByLocation(
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location: string,
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): Promise<LetterSummary[]> {
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const letters = await prisma.letter.findMany({
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where: { location },
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orderBy: [{ year: "asc" }, { month: "asc" }, { day: "asc" }],
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select: {
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slug: true,
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recipients: true,
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recipientDisplay: true,
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date: true,
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year: true,
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month: true,
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location: true,
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},
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});
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return letters;
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}
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// --- Single letter ---
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export async function getLetter(slug: string): Promise<LetterFull | null> {
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const letter = await prisma.letter.findUnique({ where: { slug } });
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if (!letter) return null;
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return {
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slug: letter.slug,
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recipients: letter.recipients,
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recipientDisplay: letter.recipientDisplay,
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date: letter.date,
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dateRef: letter.dateRef,
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year: letter.year,
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month: letter.month,
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day: letter.day,
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location: letter.location,
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salutation: letter.salutation,
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paragraphs: letter.paragraphs.map(sanitizeHtml),
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};
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}
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// --- Navigation helpers ---
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export async function getAdjacentLetters(
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slug: string,
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year: number | null,
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): Promise<{ prev: LetterSummary | null; next: LetterSummary | null }> {
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if (!year) return { prev: null, next: null };
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const yearLetters = await prisma.letter.findMany({
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where: { year },
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orderBy: [{ month: "asc" }, { day: "asc" }, { slug: "asc" }],
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select: {
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slug: true,
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recipients: true,
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recipientDisplay: true,
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date: true,
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year: true,
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month: true,
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location: true,
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},
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});
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const idx = yearLetters.findIndex((l) => l.slug === slug);
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return {
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prev: idx > 0 ? yearLetters[idx - 1] : null,
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next: idx < yearLetters.length - 1 ? yearLetters[idx + 1] : null,
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};
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}
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export async function getTotalLetterCount(): Promise<number> {
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return prisma.letter.count();
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}
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