From 763f207651060116dbeec1acaca60ac00b825ade Mon Sep 17 00:00:00 2001
From: projectmoon <projectmoon@agnos.is>
Date: Mon, 11 Nov 2024 00:03:56 +0100
Subject: [PATCH] Download a CSV!!

---
 src/background/message-handler.ts | 19 ++++++++++++++++++-
 todo.org                          | 14 ++++++++++++--
 2 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/src/background/message-handler.ts b/src/background/message-handler.ts
index f758f9c..2a6022f 100644
--- a/src/background/message-handler.ts
+++ b/src/background/message-handler.ts
@@ -112,6 +112,21 @@ const getAllTransactions = async (message: DownloadTransactionsAction) =>
 
 const mapToCsv = (transactions: GroupedRawTransaction[]) => Papa.unparse(transactions);
 
+function createdDownload(csv: string, filename: string = 'transactions.csv') {
+    const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
+
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = filename;
+
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+
+    URL.revokeObjectURL(url);
+}
+
 async function downloadStatements(
     message: DownloadTransactionsMessage
 ): Promise<DownloadTransactionReply> {
@@ -122,7 +137,9 @@ async function downloadStatements(
     // Should always be populated, but we can be careful anyway.
     if (isStatePopulated(state)) {
         const transactions = (await getAllTransactions(message)).flat();
-        return { csv: mapToCsv(transactions), error: null };
+        const csv = mapToCsv(transactions);
+        createdDownload(csv);
+        return { csv: csv, error: null }; // TODO return useful info or something.
     } else {
         return {
             csv: undefined,
diff --git a/todo.org b/todo.org
index 912cdfe..48fed11 100644
--- a/todo.org
+++ b/todo.org
@@ -1,9 +1,9 @@
 How to get it working:
  - [X] Landsbankinn API client for arbitrary transaction lists
- - [ ] Transform raw transactions into friendlier ones (i.e. date objects)
+ - [X] Transform raw transactions into friendlier ones (i.e. date objects)
  - [X] Content script that can run all the time and puts a button somewhere (statements tab, and extension icon)
  - [X] Use config.ts to set TTL for state
- - [ ] Background page that downloads all the shit and combines into CSV, then 'downloads' file.
+ - [X] Background page that downloads all the shit and combines into CSV, then 'downloads' file.
  - [X] Build up communication message passing to background page for downloads
  - [X] Don't run level on client.
  - [-] Investigate persistent = false + setTimeout
@@ -14,3 +14,13 @@ How to get it working:
    - [X] Set API key
    - [X] Set bearer token
    - [X] Intercept bearer token by yoinking it out of a request
+ - [ ] Deal with state disappearing after 15 sec (I think 15 sec was a test).
+   - We should always reload state if it's not present. And we are doing this.
+   - Why does state not re-build itself properly? It auths but does not set itself to "ready to request" mode.
+ - [ ] Make the date picker and download button nice to use.
+ - [ ] Validate date picker options when downloading.
+ - [ ] Show a download status on the web page to indicate where it is in the download process.
+ - [ ] Error handling: try-catch in various places, send messages back to content script that error occurred.
+   - [ ] Txn download
+   - [ ] CSV creation
+   - [ ] Ensure auth state API calls