feat: use rust mail-parser (#104)

* feat: imp worker v2

* feat: add rust mail-parser

* feat: imp frontend v2

* feat: imp frontend v2

* feat: update doc

* feat: add mailV1Alert

* feat: remove unused

mail-parser-wasm/src/lib.rs

@@ -0,0 +1,159 @@
+extern crate wasm_bindgen;
+
+use mail_parser::{MessageParser, MimeHeaders};
+use wasm_bindgen::prelude::*;
+
+#[derive(Clone)]
+#[wasm_bindgen]
+pub struct AttachmentResult {
+    content_id: String,
+    content_type: String,
+    filename: String,
+    content: Vec<u8>,
+}
+
+#[wasm_bindgen]
+impl AttachmentResult {
+    #[wasm_bindgen(getter)]
+    pub fn content_id(&self) -> String {
+        self.content_id.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn content_type(&self) -> String {
+        self.content_type.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn filename(&self) -> String {
+        self.filename.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn content(&self) -> Vec<u8> {
+        self.content.clone()
+    }
+}
+
+#[wasm_bindgen]
+pub struct MessageResult {
+    sender: String,
+    subject: String,
+    body_html: String,
+    text: String,
+    attachments: Vec<AttachmentResult>,
+}
+
+#[wasm_bindgen]
+impl MessageResult {
+    #[wasm_bindgen(getter)]
+    pub fn sender(&self) -> String {
+        self.sender.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn subject(&self) -> String {
+        self.subject.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn body_html(&self) -> String {
+        self.body_html.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn text(&self) -> String {
+        self.text.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn attachments(&self) -> Vec<AttachmentResult> {
+        self.attachments.clone()
+    }
+}
+
+pub fn parse_attachment(message: &mail_parser::Message) -> Vec<AttachmentResult> {
+    let mut attachments: Vec<AttachmentResult> = Vec::new();
+    for attachment in message.attachments() {
+        if !attachment.is_message() {
+            attachments.push(AttachmentResult {
+                content_id: attachment
+                    .content_id()
+                    .map(|id| id.to_owned())
+                    .unwrap_or(String::new()),
+                content_type: attachment
+                    .content_type()
+                    .map(|ct| {
+                        let c_type = ct.c_type.clone().into_owned();
+                        let c_subtype = ct.c_subtype.clone();
+                        if c_subtype.is_none() {
+                            return c_type;
+                        } else {
+                            return format!("{}/{}", c_type, c_subtype.unwrap());
+                        }
+                    })
+                    .unwrap_or(String::new()),
+                filename: attachment
+                    .attachment_name()
+                    .map(|name| name.to_owned())
+                    .unwrap_or(String::new()),
+                content: attachment.contents().to_vec(),
+            });
+        } else {
+            attachments.append(
+                &mut attachment
+                    .message()
+                    .map(|msg| parse_attachment(msg))
+                    .unwrap_or(Vec::new()),
+            );
+        }
+    }
+    attachments
+}
+
+#[wasm_bindgen]
+pub fn parse_message(raw_message: &str) -> MessageResult {
+    // check if the message is valid
+    let res = MessageParser::default().parse(raw_message);
+    if res.is_none() {
+        return MessageResult {
+            sender: String::new(),
+            subject: String::new(),
+            body_html: String::new(),
+            text: String::new(),
+            attachments: Vec::new(),
+        };
+    }
+    let message = res.unwrap();
+
+    MessageResult {
+        sender: message
+            .from()
+            .and_then(|from| from.first())
+            .map(|addr| {
+                if addr.name().is_some() {
+                    return format!(
+                        "{} <{}>",
+                        addr.name().unwrap(),
+                        addr.address().unwrap_or("")
+                    );
+                } else {
+                    return addr.address().unwrap_or("").to_owned();
+                }
+            })
+            .unwrap_or(String::new()),
+        subject: message
+            .subject()
+            .map(|subject| subject.to_owned())
+            .unwrap_or(String::new()),
+        body_html: message
+            .body_html(0)
+            .map(|html| html.into_owned())
+            .unwrap_or(String::new()),
+        text: message
+            .body_text(0)
+            .map(|text| text.into_owned())
+            .unwrap_or(String::new()),
+        attachments: parse_attachment(&message),
+    }
+}