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| 1 | +use crate::client_credentials::EmailCredentials; |
| 2 | +use crate::error::EmailError; |
| 3 | +use crate::message::{EmailMessage, SendEmail}; |
| 4 | +use smbcloud_network::environment::Environment; |
| 5 | + |
| 6 | +/// Talks to the smbCloud transactional email API. |
| 7 | +/// |
| 8 | +/// Cheap to clone — the inner `reqwest::Client` is `Arc`-backed. Build one at |
| 9 | +/// startup and clone it wherever you need it. |
| 10 | +/// |
| 11 | +/// # Authentication |
| 12 | +/// |
| 13 | +/// Every request carries `Authorization: Bearer <api_key>` from the |
| 14 | +/// [`EmailCredentials`]. Mint a key for your Mail app in the smbCloud console; |
| 15 | +/// sending is scoped to that app's verified domain. Reading messages |
| 16 | +/// (`get_message`, `list_messages`) needs a key with read scope. |
| 17 | +#[derive(Debug, Clone)] |
| 18 | +pub struct EmailClient { |
| 19 | + base_url: String, |
| 20 | + api_key: String, |
| 21 | + http: reqwest::Client, |
| 22 | +} |
| 23 | + |
| 24 | +impl EmailClient { |
| 25 | + /// Build a client from an environment and credentials. |
| 26 | + /// |
| 27 | + /// The base URL is resolved from the environment: |
| 28 | + /// - `Environment::Dev` → `http://localhost:8088` |
| 29 | + /// - `Environment::Production` → `https://api.smbcloud.xyz` |
| 30 | + pub fn from_credentials(environment: Environment, credentials: EmailCredentials<'_>) -> Self { |
| 31 | + EmailClient { |
| 32 | + base_url: crate::client_credentials::base_url(&environment), |
| 33 | + api_key: credentials.api_key.to_string(), |
| 34 | + http: reqwest::Client::new(), |
| 35 | + } |
| 36 | + } |
| 37 | + |
| 38 | + /// Send a transactional email: `POST /v1/email/messages`. |
| 39 | + /// |
| 40 | + /// Returns the created [`EmailMessage`] (status `Sent`). If the message |
| 41 | + /// carried an `idempotency_key` that was already used, the original message |
| 42 | + /// is returned and nothing is sent again. |
| 43 | + pub async fn send(&self, message: &SendEmail) -> Result<EmailMessage, EmailError> { |
| 44 | + let url = format!("{}/v1/email/messages", self.base_url); |
| 45 | + let response = self |
| 46 | + .authed(self.http.post(&url)) |
| 47 | + .json(message) |
| 48 | + .send() |
| 49 | + .await?; |
| 50 | + |
| 51 | + if response.status().is_success() { |
| 52 | + return Ok(response.json().await?); |
| 53 | + } |
| 54 | + Err(self.api_error(response).await) |
| 55 | + } |
| 56 | + |
| 57 | + /// Fetch one message by id with its delivery-event timeline: |
| 58 | + /// `GET /v1/email/messages/:id`. Requires a read-scope key. |
| 59 | + pub async fn get_message(&self, id: &str) -> Result<EmailMessage, EmailError> { |
| 60 | + let url = format!("{}/v1/email/messages/{}", self.base_url, id); |
| 61 | + let response = self.authed(self.http.get(&url)).send().await?; |
| 62 | + |
| 63 | + if response.status().is_success() { |
| 64 | + return Ok(response.json().await?); |
| 65 | + } |
| 66 | + Err(self.api_error(response).await) |
| 67 | + } |
| 68 | + |
| 69 | + /// List recent messages: `GET /v1/email/messages`. Requires a read-scope |
| 70 | + /// key. `status` filters by delivery status name (e.g. `"delivered"`); |
| 71 | + /// `limit` is clamped server-side to `1..=100`. |
| 72 | + pub async fn list_messages( |
| 73 | + &self, |
| 74 | + status: Option<&str>, |
| 75 | + limit: Option<u32>, |
| 76 | + ) -> Result<Vec<EmailMessage>, EmailError> { |
| 77 | + let url = format!("{}/v1/email/messages", self.base_url); |
| 78 | + |
| 79 | + let mut params: Vec<(&str, String)> = Vec::new(); |
| 80 | + if let Some(status) = status { |
| 81 | + params.push(("status", status.to_string())); |
| 82 | + } |
| 83 | + if let Some(limit) = limit { |
| 84 | + params.push(("limit", limit.to_string())); |
| 85 | + } |
| 86 | + |
| 87 | + let response = self |
| 88 | + .authed(self.http.get(&url)) |
| 89 | + .query(¶ms) |
| 90 | + .send() |
| 91 | + .await?; |
| 92 | + |
| 93 | + if response.status().is_success() { |
| 94 | + return Ok(response.json().await?); |
| 95 | + } |
| 96 | + Err(self.api_error(response).await) |
| 97 | + } |
| 98 | + |
| 99 | + fn authed(&self, builder: reqwest::RequestBuilder) -> reqwest::RequestBuilder { |
| 100 | + builder.header("Authorization", format!("Bearer {}", self.api_key)) |
| 101 | + } |
| 102 | + |
| 103 | + async fn api_error(&self, response: reqwest::Response) -> EmailError { |
| 104 | + let status = response.status().as_u16(); |
| 105 | + let message = response |
| 106 | + .text() |
| 107 | + .await |
| 108 | + .unwrap_or_else(|_| "unreadable response body".to_string()); |
| 109 | + EmailError::Api { status, message } |
| 110 | + } |
| 111 | +} |
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