2 files changed, 61 insertions, 0 deletions
diff --git a/src/scripts/pages/mutation-application/download-button.ts b/src/scripts/pages/mutation-application/download-button.ts
new file mode 100644
index 0000000..9503e00
--- /dev/null
+++ b/src/scripts/pages/mutation-application/download-button.ts
@@ -0,0 +1,60 @@
+import { PDFDocument, StandardFonts } from "pdf-lib";
+import { observeDOM } from "@/shared/observe-dom";
+
+const sanghaFacilitationCentreBannerUrl = "$l{ /assets/sangha-facilitation-centre-banner.jpg }l$";
+
+/**
+ * On the Mutation Application form, removes the form action (to prevent
+ * the default server-side submit) and attaches a custom click handler
+ * that fetches the declaration PDF, overlays a banner image and date
+ * stamp on the last page, then triggers a download.
+ */
+observeDOM(() => {
+	const formElement = $("#form_MutationApplication > div > div:nth-child(14) > div.col-sm-2.btreset > form");
+	const submitButtonElement = $("#btnDeclareForm");
+	if (formElement.length > 0 && submitButtonElement.length > 0) {
+		formElement.removeAttr("action");
+		submitButtonElement.on("click", (submitButtonClickEvent) => {
+			submitButtonClickEvent.preventDefault();
+
+			(async () => {
+				const pdfDoc = await PDFDocument.load(await fetch("/BanglarBhumi/MutationDeclarationForm.action", {
+					method: "post",
+					credentials: "same-origin",
+					headers: {
+						"Content-Type": "application/x-www-form-urlencoded"
+					},
+					body: "hdnAppNo="
+				}).then(res => res.arrayBuffer()));
+				const pages = pdfDoc.getPages();
+				const lastPage = pages[pages.length - 1];
+				const { width, height: _ } = lastPage.getSize();
+				const bannerImage = await pdfDoc.embedJpg(await fetch(sanghaFacilitationCentreBannerUrl).then(res => res.arrayBuffer()));
+				const bannerImageHeight = width * (bannerImage.height / bannerImage.width);
+
+				lastPage.drawImage(bannerImage, {
+					x: 0,
+					y: 0,
+					width: width,
+					height: bannerImageHeight
+				});
+
+				lastPage.drawText(pdfDoc.getCreationDate()!.toLocaleString(), {
+					x: 10,
+					y: bannerImageHeight,
+					size: 12,
+					font: await pdfDoc.embedFont(StandardFonts.TimesRoman)
+				});
+
+				const link = document.createElement("a");
+				link.href = window.URL.createObjectURL(new Blob([new Uint8Array(await pdfDoc.save())], {type: "application/pdf"}));
+				link.download = "Declaration.pdf";
+				link.click();
+			})();
+		});
+
+		return true;
+	} else {
+		return false;
+	}
+});
diff --git a/src/scripts/pages/mutation-application/index.ts b/src/scripts/pages/mutation-application/index.ts
new file mode 100644
index 0000000..93e07ad
--- /dev/null
+++ b/src/scripts/pages/mutation-application/index.ts
@@ -0,0 +1 @@
+import "@/scripts/pages/mutation-application/download-button";