Re-name templater to patcher

src/patcher/from-docx.ts

@@ -0,0 +1,74 @@
+import * as JSZip from "jszip";
+import { Element, js2xml } from "xml-js";
+
+import { ParagraphChild } from "@file/paragraph";
+import { FileChild } from "@file/file-child";
+
+import { replacer } from "./replacer";
+import { findLocationOfText } from "./traverser";
+import { toJson } from "./util";
+
+// eslint-disable-next-line functional/prefer-readonly-type
+type InputDataType = Buffer | string | number[] | Uint8Array | ArrayBuffer | Blob | NodeJS.ReadableStream;
+
+export enum PatchType {
+    DOCUMENT = "file",
+    PARAGRAPH = "paragraph",
+}
+
+type ParagraphPatch = {
+    readonly type: PatchType.PARAGRAPH;
+    readonly children: readonly ParagraphChild[];
+};
+
+type FilePatch = {
+    readonly type: PatchType.DOCUMENT;
+    readonly children: readonly FileChild[];
+};
+
+export type IPatch = {
+    readonly text: string;
+} & (ParagraphPatch | FilePatch);
+
+export interface PatchDocumentOptions {
+    readonly patches: readonly IPatch[];
+}
+
+export const patchDocument = async (data: InputDataType, options: PatchDocumentOptions): Promise<Buffer> => {
+    const zipContent = await JSZip.loadAsync(data);
+
+    const map = new Map<string, Element>();
+
+    for (const [key, value] of Object.entries(zipContent.files)) {
+        const json = toJson(await value.async("text"));
+        if (key.startsWith("word/")) {
+            for (const patch of options.patches) {
+                const renderedParagraphs = findLocationOfText(json, patch.text);
+                replacer(json, patch, renderedParagraphs);
+            }
+        }
+
+        map.set(key, json);
+    }
+
+    const zip = new JSZip();
+
+    for (const [key, value] of map) {
+        const output = toXml(value);
+
+        zip.file(key, output);
+    }
+
+    const zipData = await zip.generateAsync({
+        type: "nodebuffer",
+        mimeType: "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+        compression: "DEFLATE",
+    });
+
+    return zipData;
+};
+
+const toXml = (jsonObj: Element): string => {
+    const output = js2xml(jsonObj);
+    return output;
+};