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import type { Dal } from "../dal";
import { ForbiddenError, NotFoundError, ValidationError } from "../lib/errors";
import { validateUploadedFile } from "../lib/file-validation";
import { generateId } from "../lib/utils";
const MIME_TO_EXT: Record<string, string> = {
"image/jpeg": "jpg",
"image/png": "png",
"image/webp": "webp",
"image/gif": "gif",
"image/avif": "avif",
};
const extFromMime = (mime: string): string =>
MIME_TO_EXT[mime.split(";")[0].trim()] || "jpg";
// SSRF guard: only ever fetch image bytes from Pexels' own hosts.
const PEXELS_HOSTS = ["images.pexels.com", "www.pexels.com", "pexels.com"];
export interface UploadBlogImageInput {
file: File;
altText?: string | null;
caption?: string;
}
export interface AddMediaImageInput {
mediaId: number;
altText?: string | null;
caption?: string;
}
export interface AddPexelsImageInput {
pexelsId: string;
url: string;
width: number;
height: number;
altText?: string | null;
photographer?: string;
photographerUrl?: string;
}
export interface AddProjectImageInput {
projectPhotoId: number;
altText?: string | null;
caption?: string;
}
export interface PexelsPhoto {
id: number;
width: number;
height: number;
url: string;
photographer: string;
photographer_url: string;
src: {
original: string;
large: string;
medium: string;
small: string;
};
}
export interface PexelsSearchResult {
photos: PexelsPhoto[];
total_results: number;
page: number;
per_page: number;
}
export class BlogImagesService {
constructor(
private dal: Dal,
private env: CloudflareBindings,
) {}
/**
* Verify that a pro has access to a blog
*/
async verifyBlogAccess(blogId: string, proId: string): Promise<void> {
const blog = await this.dal.blogs.findById(blogId);
if (!blog) {
throw new NotFoundError("Blog not found");
}
// Check if pro created blog OR is featured in blog
const isCreator = blog.ideaSourceProId === proId;
const blogPros = await this.dal.blogPros.findAll({
blogId,
proId,
});
const isFeatured = blogPros.length > 0;
if (!isCreator && !isFeatured) {
throw new ForbiddenError("You don't have access to this blog");
}
}
/**
* Build an R2 key for a blog image. Pro-authored blogs key under the pro's
* namespace; admin-authored blogs (no proId) key under `admin/blogs/...` —
* matching the existing admin cover-image key scheme.
*/
private blogImageKey(
scope: { proId?: string; blogId: string },
ext: string,
): string {
const base = scope.proId
? `${scope.proId}/blogs/${scope.blogId}`
: `admin/blogs/${scope.blogId}`;
return `${base}/${generateId()}.${ext}`;
}
/**
* Upload a blog image to R2
*/
async uploadBlogImage(
blogId: string,
proId: string,
input: UploadBlogImageInput,
) {
const { file, altText, caption } = input;
// Upload to R2
const ext = file.name.split(".").pop() || "jpg";
const storageKey = this.blogImageKey({ proId, blogId }, ext);
await this.env.R2.put(storageKey, await file.arrayBuffer(), {
httpMetadata: { contentType: file.type },
});
// Get next sort order
const sortOrder = await this.dal.blogImages.getNextSortOrder(blogId);
// Create DB record
return this.dal.blogImages.create({
blogId,
sourceType: "upload",
storageKey,
altText: altText || "",
caption,
fileSize: file.size,
sortOrder,
});
}
/**
* Upload a blog image for an ADMIN-authored blog (no owning pro). Gated at
* the route layer by requirePlatformAdmin, so no per-blog access check.
*/
async uploadAdminBlogImage(blogId: string, input: UploadBlogImageInput) {
const { file, altText, caption } = input;
const ext = file.name.split(".").pop() || "jpg";
const storageKey = this.blogImageKey({ blogId }, ext);
await this.env.R2.put(storageKey, await file.arrayBuffer(), {
httpMetadata: { contentType: file.type },
});
const sortOrder = await this.dal.blogImages.getNextSortOrder(blogId);
return this.dal.blogImages.create({
blogId,
sourceType: "upload",
storageKey,
altText: altText || "",
caption,
fileSize: file.size,
sortOrder,
});
}
/**
* Reference an existing pro-gallery media item (rooms → media) into the blog
* gallery. The R2 bytes are SHARED with the project gallery — we store the
* existing storageKey and must NEVER delete those bytes on blog-image delete.
*
* Pass `opts.proId` to scope the reference to that pro's own gallery (pro
* editor). Without it the caller may reference ANY pro's media (admin editor).
*/
async addMediaImage(
blogId: string,
input: AddMediaImageInput,
opts?: { proId?: string },
) {
const media = opts?.proId
? await this.dal.media.findByIdWithProId(input.mediaId)
: await this.dal.media.findById(input.mediaId);
if (!media) {
throw new NotFoundError("Media not found");
}
if (opts?.proId && "proId" in media && media.proId !== opts.proId) {
throw new ForbiddenError("You do not have access to this media");
}
const sortOrder = await this.dal.blogImages.getNextSortOrder(blogId);
return this.dal.blogImages.create({
blogId,
sourceType: "media",
sourceId: String(media.id),
storageKey: media.storageKey, // reference — bytes owned by the pro gallery
altText: input.altText ?? media.altText ?? "",
caption: input.caption ?? media.caption ?? undefined,
width: media.width,
height: media.height,
sortOrder,
});
}
/**
* Add a Pexels stock image to the gallery by RE-HOSTING it to R2 (rather than
* hot-linking the external URL, which bypasses our /api/images rewriting and
* rots). Fetches the bytes server-side (SSRF-guarded to Pexels hosts),
* validates type/size, stores in R2, and records the R2 key as storageKey.
*/
async addPexelsImage(
blogId: string,
input: AddPexelsImageInput,
opts?: { proId?: string },
) {
const { pexelsId, url, width, height, altText } = input;
let host: string;
try {
host = new URL(url).hostname;
} catch {
throw new ValidationError("Invalid image URL");
}
if (!PEXELS_HOSTS.includes(host)) {
throw new ValidationError("Image URL must be a Pexels URL");
}
// redirect: "manual" so the host allowlist above can't be bypassed by a
// 3xx from a Pexels host to an arbitrary origin (a manual redirect yields
// a non-ok response, which we reject below).
const response = await fetch(url, { redirect: "manual" });
if (!response.ok) {
throw new ValidationError(
`Failed to fetch image from Pexels (${response.status})`,
);
}
const contentType = (response.headers.get("content-type") || "image/jpeg")
.split(";")[0]
.trim();
const bytes = await response.arrayBuffer();
// Reuse the upload validator (type + 10MB cap) by wrapping the bytes.
const ext = extFromMime(contentType);
const file = new File([bytes], `pexels-${pexelsId}.${ext}`, {
type: contentType,
});
validateUploadedFile(file);
const storageKey = this.blogImageKey({ proId: opts?.proId, blogId }, ext);
await this.env.R2.put(storageKey, bytes, {
httpMetadata: { contentType },
});
const sortOrder = await this.dal.blogImages.getNextSortOrder(blogId);
return this.dal.blogImages.create({
blogId,
sourceType: "pexels",
sourceId: pexelsId, // keep attribution
storageKey, // R2 key (NOT the external URL)
altText: altText || "",
width,
height,
fileSize: bytes.byteLength,
sortOrder,
});
}
/**
* Copy a project photo to blog gallery (legacy — project_photos removed)
*/
async addProjectPhoto(
_blogId: string,
_proId: string,
_input: AddProjectImageInput,
) {
throw new ValidationError(
"Adding project photos to blogs is no longer supported via project_photos. Use media (rooms) instead.",
);
}
/**
* Search Pexels API
*/
async searchPexels(
query: string,
page = 1,
perPage = 20,
): Promise<PexelsSearchResult> {
const apiKey = this.env.PEXELS_API_KEY;
if (!apiKey) {
throw new Error("Pexels API key not configured");
}
const response = await fetch(
`https://api.pexels.com/v1/search?query=${encodeURIComponent(query)}&page=${page}&per_page=${perPage}`,
{ headers: { Authorization: apiKey } },
);
if (!response.ok) {
throw new Error(`Pexels API error: ${response.statusText}`);
}
return response.json();
}
/**
* Get all images for a blog
*/
async getBlogImages(blogId: string) {
return this.dal.blogImages.findByBlogId(blogId);
}
/**
* Delete an image
*/
async deleteImage(imageId: number, proId: string) {
const image = await this.dal.blogImages.findById(imageId);
if (!image) {
throw new NotFoundError("Image not found");
}
// Verify pro has access to the blog
await this.verifyBlogAccess(image.blogId, proId);
// Delete from DB (R2 cleanup can be done separately)
await this.dal.blogImages.delete(imageId);
}
/**
* Update image metadata
*/
async updateImage(
imageId: number,
proId: string,
data: { altText?: string; caption?: string },
) {
const image = await this.dal.blogImages.findById(imageId);
if (!image) {
throw new NotFoundError("Image not found");
}
// Verify pro has access to the blog
await this.verifyBlogAccess(image.blogId, proId);
return this.dal.blogImages.update(imageId, data);
}
/**
* Delete an image for an admin-authored blog (route-gated by admin auth, so
* no per-pro access check). Removes only the DB row — never the R2 bytes of
* a "media" source, which are owned by the pro gallery. The image must belong
* to the blog named in the URL, so a stale/forged blogId can't delete an
* unrelated blog's image by guessing its integer id.
*/
async deleteImageAdmin(imageId: number, blogId: string) {
const image = await this.dal.blogImages.findById(imageId);
if (!image || image.blogId !== blogId) {
throw new NotFoundError("Image not found");
}
await this.dal.blogImages.delete(imageId);
}
/**
* Update image metadata for an admin-authored blog (route-gated by admin).
* The image must belong to the blog named in the URL (see deleteImageAdmin).
*/
async updateImageAdmin(
imageId: number,
blogId: string,
data: { altText?: string; caption?: string },
) {
const image = await this.dal.blogImages.findById(imageId);
if (!image || image.blogId !== blogId) {
throw new NotFoundError("Image not found");
}
return this.dal.blogImages.update(imageId, data);
}
}
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