Add darktable ghost publish plugin

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/user/gui/darktable/publish/src/api.ts

@@ -0,0 +1,110 @@
+import { sign } from "jsonwebtoken";
+import { file } from "bun";
+
+const getAdminApiKey = async () => {
+  const keyPath = process.env.GHOST_ADMIN_API_KEY_PATH;
+  if (!keyPath) {
+    throw new Error(
+      "Environment variable GHOST_ADMIN_API_KEY_PATH is not set.",
+    );
+  }
+
+  const keyFile = file(keyPath);
+  if (!(await keyFile.exists())) {
+    throw new Error(`Key file not found at path: ${keyPath}`);
+  }
+
+  return await keyFile.text();
+};
+
+const getEndpoint = () => {
+  const endpoint = process.env.GHOST_URL;
+  if (!endpoint) {
+    throw new Error("Environment variable GHOST_URL is not set.");
+  }
+
+  return endpoint;
+};
+
+const createJwt = (key: string) => {
+  const [id, secret] = key.split(":");
+  if (!id || !secret) {
+    throw new Error("Invalid API key format. Expected format: {id}:{secret}");
+  }
+
+  return sign({}, Buffer.from(secret, "hex"), {
+    keyid: id,
+    algorithm: "HS256",
+    expiresIn: "5m",
+    audience: `/admin/`,
+  });
+};
+
+const upload = async (
+  slug: string,
+  path: string,
+  type: string | undefined,
+): Promise<any> => {
+  const endpoint = getEndpoint();
+  const fullEndpoint = `${endpoint}${slug}`;
+
+  const key = await getAdminApiKey();
+  const token = createJwt(key);
+
+  const f = Bun.file(path, { type });
+  const formData = new FormData();
+  formData.append("file", f);
+
+  const response = await fetch(fullEndpoint, {
+    method: "POST",
+    headers: {
+      Authorization: `Ghost ${token}`,
+    },
+    body: formData,
+  });
+
+  if (!response.ok) {
+    throw new Error(
+      `Failed to upload to ${fullEndpoint}: ${response.status} ${response.statusText}`,
+    );
+  }
+
+  return await response.json();
+};
+
+export const uploadImage = async (imagePath: string): Promise<string> => {
+  const slug = `/ghost/api/admin/images/upload`;
+  return (await upload(slug, imagePath, "image/jpeg")).images[0].url;
+};
+
+export const uploadFile = async (filePath: string): Promise<string> => {
+  const slug = `/ghost/api/admin/files/upload`;
+  return (await upload(slug, filePath, undefined)).files[0].url;
+};
+
+export const uploadPost = async (post: any): Promise<string> => {
+  const endpoint = getEndpoint();
+  const fullEndpoint = `${endpoint}/ghost/api/admin/posts`;
+
+  const key = await getAdminApiKey();
+  const token = createJwt(key);
+
+  const response = await fetch(fullEndpoint, {
+    method: "POST",
+    headers: {
+      Authorization: `Ghost ${token}`,
+      "Content-Type": "application/json",
+    },
+    body: JSON.stringify({
+      posts: [post],
+    }),
+  });
+
+  if (!response.ok) {
+    throw new Error(
+      `Failed to upload to ${fullEndpoint}: ${response.status} ${response.statusText}`,
+    );
+  }
+
+  return (await response.json()).posts[0].url;
+};