Fetch transactions from Firefly III

This is all pretty straightforward.  The only real problem is that
the search results only contain matching transactions *splits*.  Since
transactions themselves do not have an amount, the value shown in the
_Amount_ column on the transaction list may be incorrect if a
transaction contains multiple splits and some of them do not match the
search query.

.gitignore

@@ -1 +1,3 @@
+/config.toml
+/firefly.token
 /target

Cargo.toml

@@ -10,6 +10,12 @@ license = "MIT OR Apache-2.0"
 keywords = ["personal-finance", "receipts"]
 
 [dependencies]
+chrono = { version = "0.4.40", default-features = false, features = ["serde"] }
+reqwest = { version = "0.12.12", features = ["json"] }
 rocket = { version = "0.5.1", default-features = false, features = ["json"] }
 rocket_dyn_templates = { version = "0.2.0", features = ["tera"] }
 serde = { version = "1.0.218", default-features = false, features = ["derive"] }
+thiserror = "2.0.12"
+toml = "0.8.20"
+tracing = "0.1.41"
+tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }

firefly.env

@@ -0,0 +1,3 @@
+DB_CONNECTION=sqlite
+APP_KEY=FVo8gylkwKlgtXbn4hjcdCuekDEbGyl2
+MAIL_MAILER=log

src/config.rs

@@ -0,0 +1,30 @@
+use std::path::{Path, PathBuf};
+
+use serde::Deserialize;
+
+#[derive(Debug, thiserror::Error)]
+pub enum ConfigError {
+    #[error("Unable to load file: {0}")]
+    Io(#[from] std::io::Error),
+    #[error("Error parsing file: {0}")]
+    Toml(#[from] toml::de::Error),
+}
+
+#[derive(Debug, Deserialize)]
+pub struct FireflyConfig {
+    pub url: String,
+    pub token: PathBuf,
+    pub search_query: String,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct Config {
+    pub firefly: FireflyConfig,
+}
+
+impl Config {
+    pub fn from_file(path: impl AsRef<Path>) -> Result<Self, ConfigError> {
+        let data = std::fs::read_to_string(path)?;
+        Ok(toml::from_str(&data)?)
+    }
+}

src/firefly.rs

@@ -0,0 +1,86 @@
+use reqwest::header::{HeaderMap, HeaderValue};
+use reqwest::Client;
+use serde::Deserialize;
+
+pub struct Firefly {
+    url: String,
+    client: reqwest::Client,
+}
+
+#[derive(Deserialize)]
+pub struct TransactionSplit {
+    pub date: chrono::DateTime<chrono::FixedOffset>,
+    pub amount: String,
+    pub description: String,
+}
+
+#[derive(Deserialize)]
+pub struct TransactionAttributes {
+    pub group_title: Option<String>,
+    pub transactions: Vec<TransactionSplit>,
+}
+
+#[derive(Deserialize)]
+pub struct TransactionRead {
+    pub id: String,
+    pub attributes: TransactionAttributes,
+}
+
+#[derive(Deserialize)]
+pub struct TransactionArray {
+    pub data: Vec<TransactionRead>,
+}
+
+#[derive(Deserialize)]
+pub struct TransactionSingle {
+    pub data: TransactionRead,
+}
+
+impl Firefly {
+    pub fn new(url: impl Into<String>, token: &str) -> Self {
+        let mut headers = HeaderMap::new();
+        headers.insert(
+            "Accept",
+            HeaderValue::from_static("application/vnd.api+json"),
+        );
+        headers.insert(
+            "Authorization",
+            HeaderValue::from_str(&format!("Bearer {}", &token)).unwrap(),
+        );
+        let client =
+            Client::builder().default_headers(headers).build().unwrap();
+        Self {
+            url: url.into().trim_end_matches("/").into(),
+            client,
+        }
+    }
+
+    pub fn url(&self) -> &str {
+        &self.url
+    }
+
+    pub async fn search_transactions(
+        &self,
+        query: &str,
+    ) -> Result<TransactionArray, reqwest::Error> {
+        let url = format!("{}/api/v1/search/transactions", self.url);
+        let res = self
+            .client
+            .get(url)
+            .query(&[("query", query)])
+            .send()
+            .await?;
+        res.error_for_status_ref()?;
+        res.json().await
+    }
+
+    pub async fn get_transaction(
+        &self,
+        id: &str,
+    ) -> Result<TransactionSingle, reqwest::Error> {
+        let url = format!("{}/api/v1/transactions/{}", self.url, id);
+        let res = self.client.get(url).send().await?;
+        res.error_for_status_ref()?;
+        res.json().await
+    }
+}

src/main.rs

@@ -1,23 +1,48 @@
-use std::collections::HashMap;
-use std::sync::LazyLock;
+mod config;
+mod firefly;
+
+use std::path::{Path, PathBuf};
 
 use rocket::form::Form;
 use rocket::fs::{FileServer, TempFile};
 use rocket::http::Status;
 use rocket::response::Redirect;
-use rocket::serde::Serialize;
+use rocket::State;
 use rocket_dyn_templates::{context, Template};
+use serde::Serialize;
+use tracing::{debug, error};
 
-#[derive(Serialize)]
-struct Transaction {
-    id: u32,
-    amount: f64,
-    description: String,
-    date: String,
+use config::{Config, ConfigError};
+use firefly::{Firefly, TransactionRead};
+
+struct Context {
+    #[allow(dead_code)]
+    config: Config,
+    firefly: Firefly,
 }
 
-struct Database {
-    transactions: HashMap<i32, Transaction>,
+#[derive(Debug, thiserror::Error)]
+enum InitError {
+    #[error("Invalid config: {0}")]
+    Config(#[from] ConfigError),
+}
+
+impl Context {
+    pub fn init(config: impl AsRef<Path>) -> Result<Self, InitError> {
+        let config = Config::from_file(config)?;
+        let token = std::fs::read_to_string(&config.firefly.token)
+            .map_err(ConfigError::from)?;
+        let firefly = Firefly::new(&config.firefly.url, &token);
+        Ok(Self { config, firefly })
+    }
+}
+
+#[derive(Serialize)]
+pub struct Transaction {
+    pub id: String,
+    pub amount: f64,
+    pub description: String,
+    pub date: String,
 }
 
 #[derive(rocket::FromForm)]
@@ -27,19 +52,43 @@ struct TransactionPostData<'r> {
     photo: Vec<TempFile<'r>>,
 }
 
-static DB: LazyLock<Database> = LazyLock::new(|| {
-    let mut transactions = HashMap::new();
-    transactions.insert(
-        5411,
-        Transaction {
-            id: 5411,
-            amount: 140.38,
-            description: "THE HOME DEPOT #2218".into(),
-            date: "March 2nd, 2025".into(),
+impl TryFrom<TransactionRead> for Transaction {
+    type Error = &'static str;
+
+    fn try_from(t: TransactionRead) -> Result<Self, Self::Error> {
+        let first_split = match t.attributes.transactions.first() {
+            Some(t) => t,
+            None => {
+                error!("Invalid transaction {}: no splits", t.id);
+                return Err("Transaction has no splits");
             },
-    );
-    Database { transactions }
-});
+        };
+        let date = first_split.date;
+        let amount = t
+            .attributes
+            .transactions
+            .iter()
+            .filter_map(|t| match t.amount.parse::<f64>() {
+                Ok(v) => Some(v),
+                Err(e) => {
+                    error!("Invalid amount: {}", e);
+                    None
+                },
+            })
+            .sum();
+        let description = if let Some(title) = &t.attributes.group_title {
+            title.into()
+        } else {
+            first_split.description.clone()
+        };
+        Ok(Self {
+            id: t.id,
+            amount,
+            description,
+            date: date.format("%A, %_d %B %Y").to_string(),
+        })
+    }
+}
 
 #[rocket::get("/")]
 async fn index() -> Redirect {
@@ -47,17 +96,64 @@ async fn index() -> Redirect {
 }
 
 #[rocket::get("/transactions")]
-async fn transaction_list() -> Template {
-    let transactions: Vec<_> = DB.transactions.values().collect();
-    Template::render("transaction-list", context! {
-        transactions: transactions,
+async fn transaction_list(ctx: &State<Context>) -> (Status, Template) {
+    let result = ctx
+        .firefly
+        .search_transactions(&ctx.config.firefly.search_query)
+        .await;
+
+    match result {
+        Ok(r) => {
+            let transactions: Vec<_> = r
+                .data
+                .into_iter()
+                .filter_map(|t| match Transaction::try_from(t) {
+                    Ok(t) => Some(t),
+                    Err(e) => {
+                        error!("Error parsing transaction details: {}", e);
+                        None
+                    },
                 })
+                .collect();
+            (
+                Status::Ok,
+                Template::render(
+                    "transaction-list",
+                    context! {
+                        transactions: transactions,
+                    },
+                ),
+            )
+        },
+        Err(e) => {
+            error!("Error fetching transaction list: {}", e);
+            (
+                Status::InternalServerError,
+                Template::render(
+                    "error",
+                    context! {
+                        error: "Failed to fetch transaction list from Firefly III",
+                    },
+                ),
+            )
+        },
+    }
 }
 
 #[rocket::get("/transactions/<id>")]
-async fn get_transaction(id: i32) -> Option<Template> {
-    let txn = DB.transactions.get(&id)?;
-    Some(Template::render("transaction", txn))
+async fn get_transaction(id: &str, ctx: &State<Context>) -> Option<Template> {
+    match ctx.firefly.get_transaction(id).await {
+        Ok(t) => match Transaction::try_from(t.data) {
+            Ok(t) => return Some(Template::render("transaction", t)),
+            Err(e) => {
+                error!("Invalid transaction {}: {}", id, e);
+            },
+        },
+        Err(e) => {
+            error!("Failed to get transaction {}: {}", id, e);
+        },
+    }
+    None
 }
 
 #[rocket::post("/transactions/<id>", data = "<form>")]
@@ -71,7 +167,28 @@ async fn update_transaction(
 
 #[rocket::launch]
 async fn rocket() -> _ {
+    tracing_subscriber::fmt()
+        .with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
+        .with_writer(std::io::stderr)
+        .init();
+
+    let cfg_path = match std::env::args_os().nth(1) {
+        Some(f) => PathBuf::from(f),
+        None => PathBuf::from("config.toml"),
+    };
+    debug!("Using configuration file {}", cfg_path.display());
+
+    let ctx = match Context::init(cfg_path) {
+        Ok(c) => c,
+        Err(e) => {
+            error!("Failed to initialize application context: {}", e);
+            std::process::exit(1);
+        },
+    };
+    debug!("Using Firefly III URL {}", &ctx.firefly.url());
+
     rocket::build()
+        .manage(ctx)
         .mount(
             "/",
             rocket::routes![

start-firefly.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+podman run \
+	--rm \
+	-d \
+	--name firefly-iii \
+	--env-file firefly.env \
+	-v firefly-iii:/storage \
+	-p 8080:8080 \
+	docker.io/fireflyiii/core

templates/error.html.tera

@@ -0,0 +1,6 @@
+{% extends "base" %} {% block head %}
+<title>Error</title>
+{% endblock %} {% block main %}
+<h1>Error</h1>
+<p style="color: var(--sl-color-red-600)">{{ error }}</p>
+{% endblock %}