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import { z } from "zod";
import {
ATTACHMENT_ARCHIVE_BUILD_VERSION,
ATTACHMENT_ARCHIVE_FAILURE_CODES,
ATTACHMENT_ARCHIVE_NAMESPACES,
ATTACHMENT_ARCHIVE_SCOPES,
ATTACHMENT_ARCHIVE_STATUSES,
AttachmentArchiveBlockedAttachment,
AttachmentArchiveCurrent,
AttachmentArchiveFailureCode,
AttachmentArchiveNamespace,
AttachmentArchivePackageManifest,
AttachmentArchivePackageManifestSection,
AttachmentArchiveScope,
AttachmentArchiveSectionManifest,
AttachmentArchiveSectionRequest,
AttachmentArchiveSourceAttachment,
AttachmentArchiveStatus,
} from "./types";
function compareStrings(left: string, right: string): number {
return left.localeCompare(right);
}
function buildArchiveEntryFilename(filename: string, index: number): string {
const lastDot = filename.lastIndexOf(".");
Iif (lastDot <= 0) {
return `${filename} (${index})`;
}
const basename = filename.slice(0, lastDot);
const extension = filename.slice(lastDot);
return `${basename} (${index})${extension}`;
}
function getUniqueArchiveEntryFilenames(filenames: string[]): string[] {
const usedNames = new Set<string>();
return filenames.map((filename) => {
if (!usedNames.has(filename)) {
usedNames.add(filename);
return filename;
}
let duplicateIndex = 2;
let candidate = buildArchiveEntryFilename(filename, duplicateIndex);
while (usedNames.has(candidate)) {
duplicateIndex += 1;
candidate = buildArchiveEntryFilename(filename, duplicateIndex);
}
usedNames.add(candidate);
return candidate;
});
}
function sanitizeDownloadComponent(value: string): string {
return value.replace(/[^A-Za-z0-9._-]+/g, "_");
}
function formatEasternDownloadDate(now = new Date()): string {
const parts = new Intl.DateTimeFormat("en-US", {
timeZone: "America/New_York",
weekday: "short",
month: "short",
day: "numeric",
year: "numeric",
}).formatToParts(now);
const getPart = (type: string) => parts.find((part) => part.type === type)?.value;
return [getPart("weekday"), getPart("month"), getPart("day"), getPart("year")]
.filter((value): value is string => Boolean(value))
.join(" ");
}
function sortAttachments(attachments: AttachmentArchiveSourceAttachment[]) {
return [...attachments]
.map((attachment) => ({
bucket: attachment.bucket,
key: attachment.key,
filename: attachment.filename,
title: attachment.title,
uploadDate: attachment.uploadDate,
}))
.sort((left, right) => {
return (
compareStrings(left.filename, right.filename) ||
compareStrings(left.key, right.key) ||
compareStrings(left.bucket, right.bucket) ||
compareStrings(left.title, right.title) ||
(left.uploadDate || 0) - (right.uploadDate || 0)
);
});
}
export function normalizeArchivePathComponent(value: string): string {
return encodeURIComponent(value);
}
export function buildSectionArchiveFolderName({
sectionNumber,
sectionLabel,
}: {
sectionNumber: number;
sectionLabel: string;
}): string {
return `section-${sectionNumber}-${sectionLabel}`;
}
export function getPackageArchiveRootFolderName(packageId: string): string {
return `${sanitizeDownloadComponent(packageId)}-attachments`;
}
export function getSectionArchiveRootFolderName({
packageId,
sectionNumber,
sectionLabel,
}: {
packageId: string;
sectionNumber: number;
sectionLabel: string;
}): string {
return `${sanitizeDownloadComponent(packageId)}-${buildSectionArchiveFolderName({
sectionNumber,
sectionLabel,
})}`;
}
export function getArchiveBasePrefix({
packageId,
scope,
sectionId,
archiveNamespace = "main",
}: {
packageId: string;
scope: AttachmentArchiveScope;
sectionId?: string;
archiveNamespace?: AttachmentArchiveNamespace;
}): string {
Iif (!ATTACHMENT_ARCHIVE_NAMESPACES.includes(archiveNamespace)) {
throw new Error(`Unsupported attachment archive namespace: ${archiveNamespace}`);
}
const normalizedPackageId = normalizeArchivePathComponent(packageId);
const namespacePrefix = archiveNamespace === "draft" ? "/draft" : "";
if (scope === "all") {
return `package/${normalizedPackageId}${namespacePrefix}/all`;
}
Iif (!sectionId) {
throw new Error("sectionId is required for section-scoped archives");
}
return `package/${normalizedPackageId}${namespacePrefix}/section/${normalizeArchivePathComponent(sectionId)}`;
}
export function getArchiveCurrentKey(request: {
packageId: string;
scope: AttachmentArchiveScope;
sectionId?: string;
archiveNamespace?: AttachmentArchiveNamespace;
}): string {
return `${getArchiveBasePrefix(request)}/current.json`;
}
export function getArchiveManifestKey(
request: {
packageId: string;
scope: AttachmentArchiveScope;
sectionId?: string;
archiveNamespace?: AttachmentArchiveNamespace;
},
hash: string,
): string {
return `${getArchiveBasePrefix(request)}/${hash}.manifest.json`;
}
export function getArchiveArtifactKey(
request: {
packageId: string;
scope: AttachmentArchiveScope;
sectionId?: string;
archiveNamespace?: AttachmentArchiveNamespace;
},
hash: string,
): string {
return `${getArchiveBasePrefix(request)}/${hash}.zip`;
}
export function getArchiveDownloadFilename(request: {
packageId: string;
scope: AttachmentArchiveScope;
sectionNumber?: number;
sectionLabel?: string;
now?: Date;
}): string {
const packageId = sanitizeDownloadComponent(request.packageId);
if (request.scope === "all") {
return `${packageId} - ${formatEasternDownloadDate(request.now)}.zip`;
}
const sectionNumber = request.sectionNumber || 1;
const sectionLabel = sanitizeDownloadComponent(request.sectionLabel || "section");
return `${packageId}-section-${sectionNumber}-${sectionLabel}-attachments.zip`;
}
export function buildSectionAttachmentArchiveManifest(
request: AttachmentArchiveSectionRequest,
): AttachmentArchiveSectionManifest {
const sortedAttachments = sortAttachments(request.attachments);
const archiveFilenames = getUniqueArchiveEntryFilenames(
sortedAttachments.map((attachment) => attachment.filename),
);
const attachments = sortedAttachments.map((attachment, index) => ({
...attachment,
archiveFilename: archiveFilenames[index],
archivePath: `${request.rootFolderName}/${archiveFilenames[index]}`,
}));
const canonicalPayload = JSON.stringify({
buildVersion: ATTACHMENT_ARCHIVE_BUILD_VERSION,
packageId: request.packageId,
scope: request.scope,
sectionId: request.sectionId,
sectionNumber: request.sectionNumber,
sectionLabel: request.sectionLabel,
sectionFolderName: request.sectionFolderName,
rootFolderName: request.rootFolderName,
attachments: attachments.map((attachment) => ({
archiveFilename: attachment.archiveFilename,
archivePath: attachment.archivePath,
bucket: attachment.bucket,
filename: attachment.filename,
key: attachment.key,
title: attachment.title,
uploadDate: attachment.uploadDate,
})),
});
const hash = createHash("sha256").update(canonicalPayload).digest("hex");
return {
version: 2,
buildVersion: ATTACHMENT_ARCHIVE_BUILD_VERSION,
type: "section",
packageId: request.packageId,
scope: "section",
sectionId: request.sectionId,
sectionNumber: request.sectionNumber,
sectionLabel: request.sectionLabel,
sectionFolderName: request.sectionFolderName,
rootFolderName: request.rootFolderName,
hash,
createdAt: new Date().toISOString(),
attachments,
};
}
export function buildPackageAttachmentArchiveManifest({
packageId,
sections,
}: {
packageId: string;
sections: AttachmentArchivePackageManifestSection[];
}): AttachmentArchivePackageManifest {
const rootFolderName = getPackageArchiveRootFolderName(packageId);
const canonicalSections = sections.map((section) => ({
sectionId: section.sectionId,
sectionNumber: section.sectionNumber,
sectionLabel: section.sectionLabel,
sectionFolderName: section.sectionFolderName,
rootFolderName: section.rootFolderName,
attachmentCount: section.attachmentCount,
hash: section.hash,
}));
const hash = createHash("sha256")
.update(
JSON.stringify({
buildVersion: ATTACHMENT_ARCHIVE_BUILD_VERSION,
packageId,
scope: "all",
rootFolderName,
sections: canonicalSections,
}),
)
.digest("hex");
return {
version: 2,
buildVersion: ATTACHMENT_ARCHIVE_BUILD_VERSION,
type: "package",
packageId,
scope: "all",
hash,
createdAt: new Date().toISOString(),
rootFolderName,
sections,
};
}
export function buildAttachmentArchiveCurrent({
scope,
hash,
status,
artifactKey,
manifestKey,
attachmentCount,
appendedAttachmentCount,
skippedAttachmentCount,
executionArn,
sectionId,
sectionNumber,
sectionLabel,
sectionFolderName,
failureCode,
failureMessage,
blockedAttachment,
errorMessage,
}: {
scope: AttachmentArchiveScope;
hash: string;
status: AttachmentArchiveStatus;
artifactKey: string;
manifestKey: string;
attachmentCount: number;
appendedAttachmentCount?: number;
skippedAttachmentCount?: number;
executionArn?: string;
sectionId?: string;
sectionNumber?: number;
sectionLabel?: string;
sectionFolderName?: string;
failureCode?: AttachmentArchiveFailureCode;
failureMessage?: string;
blockedAttachment?: AttachmentArchiveBlockedAttachment;
errorMessage?: string;
}): AttachmentArchiveCurrent {
return {
version: 2,
scope,
hash,
status,
artifactKey,
manifestKey,
attachmentCount,
...(typeof appendedAttachmentCount === "number" ? { appendedAttachmentCount } : {}),
...(typeof skippedAttachmentCount === "number" ? { skippedAttachmentCount } : {}),
updatedAt: new Date().toISOString(),
...(executionArn ? { executionArn } : {}),
...(sectionId ? { sectionId } : {}),
...(sectionNumber ? { sectionNumber } : {}),
...(sectionLabel ? { sectionLabel } : {}),
...(sectionFolderName ? { sectionFolderName } : {}),
...(failureCode ? { failureCode } : {}),
...(failureMessage ? { failureMessage } : {}),
...(blockedAttachment ? { blockedAttachment } : {}),
...(errorMessage || failureMessage ? { errorMessage: errorMessage || failureMessage } : {}),
};
}
export const AttachmentArchiveBlockedAttachmentSchema = z
.object({
bucket: z.string(),
key: z.string(),
filename: z.string(),
title: z.string(),
virusScanStatus: z.string().optional(),
})
.passthrough();
export const AttachmentArchiveCurrentSchema = z
.object({
version: z.literal(2),
scope: z.enum(ATTACHMENT_ARCHIVE_SCOPES),
hash: z.string(),
status: z.enum(ATTACHMENT_ARCHIVE_STATUSES),
artifactKey: z.string(),
manifestKey: z.string(),
attachmentCount: z.number(),
appendedAttachmentCount: z.number().optional(),
skippedAttachmentCount: z.number().optional(),
updatedAt: z.string(),
executionArn: z.string().optional(),
sectionId: z.string().optional(),
sectionNumber: z.number().optional(),
sectionLabel: z.string().optional(),
sectionFolderName: z.string().optional(),
failureCode: z.enum(ATTACHMENT_ARCHIVE_FAILURE_CODES).optional(),
failureMessage: z.string().optional(),
blockedAttachment: AttachmentArchiveBlockedAttachmentSchema.optional(),
errorMessage: z.string().optional(),
})
.passthrough();
export function parseAttachmentArchiveCurrent(
value: string | undefined,
): AttachmentArchiveCurrent | undefined {
if (!value) {
return undefined;
}
let parsed: unknown;
try {
parsed = JSON.parse(value);
} catch {
return undefined;
}
const result = AttachmentArchiveCurrentSchema.safeParse(parsed);
return result.success ? (result.data as AttachmentArchiveCurrent) : undefined;
}
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