feat(export/zip): add option to export with share theme

apps/server/src/services/export/zip/share_theme.ts

@@ -0,0 +1,86 @@
+import { join } from "path";
+import NoteMeta from "../../meta/note_meta";
+import { ZipExportProvider } from "./abstract_provider";
+import { RESOURCE_DIR } from "../../resource_dir";
+import { getResourceDir, isDev } from "../../utils";
+import fs from "fs";
+import { renderNoteForExport } from "../../../share/content_renderer";
+import type BNote from "../../../becca/entities/bnote.js";
+import type BBranch from "../../../becca/entities/bbranch.js";
+
+export default class ShareThemeExportProvider extends ZipExportProvider {
+
+    private assetsMeta: NoteMeta[] = [];
+
+    prepareMeta(): void {
+        const assets = [
+            "style.css",
+            "script.js",
+            "boxicons.css",
+            "boxicons.eot",
+            "boxicons.woff2",
+            "boxicons.woff",
+            "boxicons.ttf",
+            "boxicons.svg",
+            "icon-color.svg"
+        ];
+
+        for (const asset of assets) {
+            const assetMeta = {
+                noImport: true,
+                dataFileName: asset
+            };
+            this.assetsMeta.push(assetMeta);
+            this.metaFile.files.push(assetMeta);
+        }
+    }
+
+    prepareContent(title: string, content: string | Buffer, noteMeta: NoteMeta, note: BNote, branch: BBranch): string | Buffer {
+        if (!noteMeta?.notePath?.length) {
+            throw new Error("Missing note path.");
+        }
+        const basePath = "../".repeat(noteMeta.notePath.length - 1);
+
+        content = renderNoteForExport(note, branch, basePath);
+
+        return content;
+    }
+
+    afterDone(): void {
+        this.#saveAssets(this.rootMeta, this.assetsMeta);
+    }
+
+    #saveAssets(rootMeta: NoteMeta, assetsMeta: NoteMeta[]) {
+        for (const assetMeta of assetsMeta) {
+            if (!assetMeta.dataFileName) {
+                continue;
+            }
+
+            let cssContent = getShareThemeAssets(assetMeta.dataFileName);
+            this.archive.append(cssContent, { name: assetMeta.dataFileName });
+        }
+    }
+
+}
+
+function getShareThemeAssets(nameWithExtension: string) {
+    // Rename share.css to style.css.
+    if (nameWithExtension === "style.css") {
+        nameWithExtension = "share.css";
+    } else if (nameWithExtension === "script.js") {
+        nameWithExtension = "share.js";
+    }
+
+    let path: string | undefined;
+    if (nameWithExtension === "icon-color.svg") {
+        path = join(RESOURCE_DIR, "images", nameWithExtension);
+    } else if (isDev) {
+        path = join(getResourceDir(), "..", "..", "client", "dist", "src", nameWithExtension);
+    }
+
+    if (!path) {
+        throw new Error("Not yet defined.");
+    }
+
+    return fs.readFileSync(path);
+}