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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as published + by the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..625435f --- /dev/null +++ b/README.md @@ -0,0 +1,27 @@ +# Mailpot +## flexible mailing list manager + +```text +% mpot help +mailpot 0.1.0 +mini mailing list manager + +USAGE: + mpot [FLAGS] [OPTIONS] + +FLAGS: + -d, --debug Activate debug mode + -h, --help Prints help information + -V, --version Prints version information + +OPTIONS: + -c, --config Set config file + +SUBCOMMANDS: + create-list Create new list + db-location Prints database filesystem location + help Prints this message or the help of the given subcommand(s) + list Mailing list management + list-lists Lists all registered mailing lists + post Post message from STDIN to list +``` diff --git a/src/config.rs b/src/config.rs new file mode 100644 index 0000000..0454814 --- /dev/null +++ b/src/config.rs @@ -0,0 +1,76 @@ +/* + * This file is part of mailpot + * + * Copyright 2020 - Manos Pitsidianakis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +use super::errors::*; +use chrono::prelude::*; +use std::io::Write; +use std::os::unix::fs::PermissionsExt; +use std::path::PathBuf; + +#[derive(Debug, Serialize, Deserialize, Clone)] +#[serde(tag = "type", content = "value")] +pub enum SendMail { + Smtp(melib::smtp::SmtpServerConf), + ShellCommand(String), +} + +#[derive(Debug, Serialize, Deserialize, Clone)] +pub struct Configuration { + send_mail: SendMail, +} + +impl Configuration { + pub fn data_directory() -> Result { + Ok(xdg::BaseDirectories::with_prefix("mailpot")?.get_data_home()) + } + + pub fn save_message_to_path(msg: &str, mut path: PathBuf) -> Result { + let now = Local::now().timestamp(); + path.push(format!("{}-failed.eml", now)); + + let mut file = std::fs::File::create(&path)?; + let metadata = file.metadata()?; + let mut permissions = metadata.permissions(); + + permissions.set_mode(0o600); // Read/write for owner only. + file.set_permissions(permissions)?; + file.write_all(msg.as_bytes())?; + file.flush()?; + Ok(path) + } + + pub fn save_message(msg: String) -> Result { + match Configuration::data_directory() + .and_then(|path| Self::save_message_to_path(&msg, path)) + { + Ok(p) => return Ok(p), + Err(err) => { + eprintln!("{}", err); + } + }; + match Self::save_message_to_path(&msg, PathBuf::from(".")) { + Ok(p) => return Ok(p), + Err(err) => { + eprintln!("{}", err); + } + } + let temp_path = std::env::temp_dir(); + Self::save_message_to_path(&msg, temp_path) + } +} diff --git a/src/db.rs b/src/db.rs new file mode 100644 index 0000000..34ba6f5 --- /dev/null +++ b/src/db.rs @@ -0,0 +1,220 @@ +/* + * This file is part of mailpot + * + * Copyright 2020 - Manos Pitsidianakis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +use super::*; +use melib::Envelope; +pub use rusqlite::{self, params, Connection}; +use std::convert::TryFrom; +use std::path::PathBuf; + +const DB_NAME: &str = "mpot.db"; +const INIT_SCRIPT: &str = "PRAGMA foreign_keys = true; + PRAGMA encoding = 'UTF-8'; + + CREATE TABLE IF NOT EXISTS mailing_lists ( + pk INTEGER PRIMARY KEY, + name TEXT NOT NULL, + id TEXT NOT NULL, + address TEXT NOT NULL, + archive_url TEXT, + description TEXT + ); + CREATE TABLE IF NOT EXISTS membership ( + list INTEGER NOT NULL, + address TEXT NOT NULL, + name TEXT, + digest BOOLEAN NOT NULL DEFAULT 0, + hide_address BOOLEAN NOT NULL DEFAULT 0, + receive_duplicates BOOLEAN NOT NULL DEFAULT 1, + receive_own_posts BOOLEAN NOT NULL DEFAULT 0, + receive_confirmation BOOLEAN NOT NULL DEFAULT 1, + PRIMARY KEY (list, address), + FOREIGN KEY (list) REFERENCES mailing_lists ON DELETE CASCADE + ); + CREATE INDEX IF NOT EXISTS mailing_lists_idx ON mailing_lists(id); + CREATE INDEX IF NOT EXISTS membership_idx ON membership(address);"; + +pub struct Database { + connection: Connection, +} + +impl Database { + pub fn list_lists(&self) -> Result> { + let mut stmt = self + .connection + .prepare("SELECT * FROM mailing_lists;") + .unwrap(); + let res = stmt + .query_map(params![], |row| MailingList::try_from(row))? + .map(|r| r.map_err(|err| err.into())) + .collect(); + res + } + + pub fn list_members(&self, pk: i64) -> Result> { + let mut stmt = self + .connection + .prepare("SELECT * FROM membership WHERE list = ?;") + .unwrap(); + let res = stmt + .query_map(params![pk], |row| ListMembership::try_from(row))? + .map(|r| r.map_err(|err| err.into())) + .collect(); + res + } + + pub fn add_member(&self, list_pk: i64, new_val: ListMembership) -> Result<()> { + self.connection.execute( + "INSERT INTO membership (list, address, name, digest, hide_address) VALUES (?1, ?2, ?3, ?4, ?5);", + params![ + &list_pk, + &new_val.address, + &new_val.name, + &new_val.digest, + &new_val.hide_address + ], + )?; + Ok(()) + } + + pub fn remove_member(&self, list_pk: i64, address: &str) -> Result<()> { + if self.connection.execute( + "DELETE FROM membership WHERE list = ?1 AND address = ?2;", + params![&list_pk, &address,], + )? == 0 + { + Err(format!("Address {} is not a member of this list.", address))?; + } + Ok(()) + } + + pub fn create_list(&self, new_val: MailingList) -> Result<()> { + self.connection.execute( + "INSERT INTO mailing_lists (name, id, address, description) VALUES (?1, ?2, ?3, ?4)", + params![ + &new_val.name, + &new_val.id, + &new_val.address, + &new_val.description + ], + )?; + Ok(()) + } + + pub fn db_path() -> Result { + let name = DB_NAME; + let data_dir = xdg::BaseDirectories::with_prefix("mailpot")?; + Ok(data_dir.place_data_file(name)?) + } + + pub fn open_db(db_path: PathBuf) -> Result { + if !db_path.exists() { + return Err("Database doesn't exist".into()); + } + Ok(Database { + connection: Connection::open(&db_path)?, + }) + } + + pub fn open_or_create_db() -> Result { + let db_path = Self::db_path()?; + let mut set_mode = false; + if !db_path.exists() { + println!("Creating {} database in {}", DB_NAME, db_path.display()); + set_mode = true; + } + let conn = Connection::open(&db_path)?; + if set_mode { + use std::os::unix::fs::PermissionsExt; + let file = std::fs::File::open(&db_path)?; + let metadata = file.metadata()?; + let mut permissions = metadata.permissions(); + + permissions.set_mode(0o600); // Read/write for owner only. + file.set_permissions(permissions)?; + } + + conn.execute_batch(INIT_SCRIPT)?; + + Ok(Database { connection: conn }) + } + + pub fn get_list_filters(&self, _list: &MailingList) -> Vec> { + use crate::post::*; + vec![ + Box::new(FixCRLF), + Box::new(PostRightsCheck), + Box::new(AddListHeaders), + Box::new(FinalizeRecipients), + ] + } + + pub fn post(&self, env: Envelope, raw: &[u8]) -> Result<()> { + let mut lists = self.list_lists()?; + let tos = env + .to() + .iter() + .map(|addr| addr.get_email()) + .collect::>(); + if tos.is_empty() { + return Err("Envelope To: field is empty!".into()); + } + if env.from().is_empty() { + return Err("Envelope From: field is empty!".into()); + } + + lists.retain(|list| tos.iter().any(|a| a == &list.address)); + if lists.is_empty() { + return Err("Envelope To: field doesn't contain any known lists!".into()); + } + + use crate::post::{Post, PostAction}; + for mut list in lists { + let filters = self.get_list_filters(&list); + let memberships = self.list_members(list.pk)?; + let mut post = Post { + list: &mut list, + from: env.from()[0].clone(), + memberships: &memberships, + bytes: raw.to_vec(), + to: env.to().to_vec(), + action: PostAction::Defer { + reason: "Default action.".into(), + }, + }; + let result = { + let result: std::result::Result<_, String> = filters + .into_iter() + .fold(Ok(&mut post), |post, f| post.and_then(|p| f.feed(p))); + format!("{:#?}", result) + }; + eprintln!("result for list {} is {}", list, result); + } + /* + + use melib::futures; + use melib::smol; + use melib::smtp::*; + std::thread::spawn(|| smol::run(futures::future::pending::<()>())); + let mut conn = futures::executor::block_on(SmtpConnection::new_connection(conf)).unwrap(); + futures::executor::block_on(conn.mail_transaction(raw, )).unwrap(); + */ + Ok(()) + } +} diff --git a/src/errors.rs b/src/errors.rs new file mode 100644 index 0000000..a1513e5 --- /dev/null +++ b/src/errors.rs @@ -0,0 +1,28 @@ +/* + * This file is part of mailpot + * + * Copyright 2020 - Manos Pitsidianakis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +// Create the Error, ErrorKind, ResultExt, and Result types +error_chain! { + foreign_links { + Sql(rusqlite::Error); + Io(::std::io::Error); + Xdg(xdg::BaseDirectoriesError); + Melib(melib::error::MeliError); + } +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..2139257 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,266 @@ +/* + * This file is part of mailpot + * + * Copyright 2020 - Manos Pitsidianakis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +// `error_chain!` can recurse deeply +#![recursion_limit = "1024"] + +#[macro_use] +extern crate error_chain; +#[macro_use] +extern crate serde; +use structopt::StructOpt; + +pub mod config; +pub use config::*; +pub mod models; +pub mod post; +pub use models::*; +pub mod errors; +pub use errors::*; +pub mod db; +pub use db::*; + +use std::path::PathBuf; + +#[derive(Debug, StructOpt)] +#[structopt( + name = "mailpot", + about = "mini mailing list manager", + author = "Manos Pitsidianakis " +)] +struct Opt { + /// Activate debug mode + #[structopt(short, long)] + debug: bool, + + /// Set config file + #[structopt(short, long, parse(from_os_str))] + config: Option, + #[structopt(flatten)] + cmd: Command, +} + +#[derive(Debug, StructOpt)] +enum Command { + ///Prints database filesystem location + DbLocation, + ///Lists all registered mailing lists + ListLists, + ///Mailing list management + List { + ///Selects mailing list to operate on + list_id: String, + #[structopt(subcommand)] + cmd: ListCommand, + }, + ///Create new list + CreateList { + ///List name + #[structopt(long)] + name: String, + ///List ID + #[structopt(long)] + id: String, + ///List e-mail address + #[structopt(long)] + address: String, + ///List description + #[structopt(long)] + description: Option, + ///List archive URL + #[structopt(long)] + archive_url: Option, + }, + ///Post message from STDIN to list + Post { + #[structopt(long)] + dry_run: bool, + }, +} + +#[derive(Debug, StructOpt)] +enum ListCommand { + Members, + AddMember { + /// E-mail address + #[structopt(long)] + address: String, + /// Name + #[structopt(long)] + name: Option, + /// Send messages as digest? + #[structopt(long)] + digest: bool, + /// Hide message from list when posting? + #[structopt(long)] + hide_address: bool, + #[structopt(long)] + receive_confirmation: Option, + #[structopt(long)] + receive_duplicates: Option, + #[structopt(long)] + receive_own_posts: Option, + }, + RemoveMember { + #[structopt(long)] + /// E-mail address + address: String, + }, + Health, +} + +fn run_app(opt: Opt) -> Result<()> { + if opt.debug { + println!("DEBUG: {:?}", &opt); + } + use Command::*; + match opt.cmd { + DbLocation => { + println!("{}", Database::db_path()?.display()); + } + ListLists => { + let db = Database::open_or_create_db()?; + let lists = db.list_lists()?; + if lists.is_empty() { + println!("No lists found."); + } else { + for l in lists { + println!("- {} {:?}", l.id, l); + } + } + } + List { list_id, cmd } => { + let db = Database::open_or_create_db()?; + let mut lists = db.list_lists()?; + let list = if let Some(pos) = lists.iter().position(|l| l.id == list_id) { + lists.remove(pos) + } else { + return Err(format!("No list with id {} was found", list_id))?; + }; + use ListCommand::*; + match cmd { + Members => { + let members = db.list_members(list.pk)?; + if members.is_empty() { + println!("No members found."); + } else { + println!("Members of list {}", list.id); + for l in members { + println!("- {}", &l); + } + } + } + AddMember { + address, + name, + digest, + hide_address, + receive_confirmation, + receive_duplicates, + receive_own_posts, + } => { + db.add_member( + list.pk, + ListMembership { + list: list.pk, + name, + address, + digest, + hide_address, + receive_confirmation: receive_confirmation.unwrap_or(true), + receive_duplicates: receive_duplicates.unwrap_or(true), + receive_own_posts: receive_own_posts.unwrap_or(false), + }, + )?; + } + RemoveMember { address } => { + loop { + println!( + "Are you sure you want to remove membership of {} from list {}? [Yy/n]", + address, list + ); + let mut input = String::new(); + std::io::stdin().read_line(&mut input)?; + if input.trim() == "Y" || input.trim() == "y" || input.trim() == "" { + break; + } else if input.trim() == "n" { + return Ok(()); + } + } + + db.remove_member(list.pk, &address)?; + } + Health => { + println!("{} health:", list); + } + } + } + CreateList { + name, + id, + address, + description, + archive_url, + } => { + let db = Database::open_or_create_db()?; + db.create_list(MailingList { + pk: 0, + name, + id, + description, + address, + archive_url, + })?; + } + Post { dry_run } => { + if opt.debug { + println!("post dry_run{:?}", dry_run); + } + + use melib::Envelope; + use std::io::Read; + + let mut input = String::new(); + std::io::stdin().read_to_string(&mut input)?; + match Envelope::from_bytes(input.as_bytes(), None) { + Ok(env) => { + let db = Database::open_or_create_db()?; + db.post(env, input.as_bytes())?; + } + Err(err) => { + eprintln!("Could not parse message: {}", err); + let p = Configuration::save_message(input)?; + eprintln!("Message saved at {}", p.display()); + Err(err)?; + } + } + } + } + + Ok(()) +} + +fn main() -> std::result::Result<(), i32> { + let opt = Opt::from_args(); + if let Err(err) = run_app(opt) { + println!("{}", err); + std::process::exit(-1); + } + Ok(()) +} diff --git a/src/models.rs b/src/models.rs new file mode 100644 index 0000000..c6479d3 --- /dev/null +++ b/src/models.rs @@ -0,0 +1,145 @@ +/* + * This file is part of mailpot + * + * Copyright 2020 - Manos Pitsidianakis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +use super::*; +use rusqlite::Row; +use std::convert::TryFrom; + +#[derive(Debug)] +pub struct MailingList { + pub pk: i64, + pub name: String, + pub id: String, + pub address: String, + pub description: Option, + pub archive_url: Option, +} + +impl std::fmt::Display for MailingList { + fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result { + if let Some(description) = self.description.as_ref() { + write!( + fmt, + "[#{} {}] {} <{}>: {}", + self.pk, self.id, self.name, self.address, description + ) + } else { + write!( + fmt, + "[#{} {}] {} <{}>", + self.pk, self.id, self.name, self.address + ) + } + } +} + +impl TryFrom<&'_ Row<'_>> for MailingList { + type Error = rusqlite::Error; + fn try_from(row: &'_ Row<'_>) -> std::result::Result { + Ok(MailingList { + pk: row.get("pk")?, + name: row.get("name")?, + id: row.get("id")?, + address: row.get("address")?, + description: row.get("description")?, + archive_url: row.get("archive_url")?, + }) + } +} + +impl MailingList { + pub fn list_id(&self) -> String { + format!("\"{}\" <{}>", self.name, self.address) + } + + pub fn list_post(&self) -> Option { + Some(format!("", self.address)) + } + + pub fn list_unsubscribe(&self) -> Option { + let p = self.address.split("@").collect::>(); + Some(format!( + "", + p[0], p[1] + )) + } + + pub fn list_archive(&self) -> Option { + self.archive_url.as_ref().map(|url| format!("<{}>", url)) + } +} + +#[derive(Debug)] +pub struct ListMembership { + pub list: i64, + pub address: String, + pub name: Option, + pub digest: bool, + pub hide_address: bool, + pub receive_duplicates: bool, + pub receive_own_posts: bool, + pub receive_confirmation: bool, +} + +impl std::fmt::Display for ListMembership { + fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result { + if let Some(name) = self.name.as_ref() { + write!( + fmt, + "{} <{}> [digest: {}, hide_address: {}]", + name, self.address, self.digest, self.hide_address + ) + } else { + write!( + fmt, + "{} [digest: {}, hide_address: {}]", + self.address, self.digest, self.hide_address + ) + } + } +} + +impl TryFrom<&'_ Row<'_>> for ListMembership { + type Error = rusqlite::Error; + fn try_from(row: &'_ Row<'_>) -> std::result::Result { + Ok(ListMembership { + list: row.get("list")?, + address: row.get("address")?, + name: row.get("name")?, + digest: row.get("digest")?, + hide_address: row.get("hide_address")?, + receive_duplicates: row.get("receive_duplicates")?, + receive_own_posts: row.get("receive_own_posts")?, + receive_confirmation: row.get("receive_confirmation")?, + }) + } +} + +impl ListMembership { + pub fn into_address(&self) -> melib::email::Address { + use melib::email::Address; + use melib::email::StrBuilder; + use melib::MailboxAddress; + if let Some(name) = self.name.as_ref() { + melib::make_address!(name, self.address) + } else { + melib::make_address!("", self.address) + } + } +} diff --git a/src/post.rs b/src/post.rs new file mode 100644 index 0000000..c7ffd67 --- /dev/null +++ b/src/post.rs @@ -0,0 +1,188 @@ +/* + * This file is part of mailpot + * + * Copyright 2020 - Manos Pitsidianakis + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see . + */ + +use super::*; +use melib::Address; + +#[derive(Debug)] +pub enum PostAction { + Accept { + recipients: Vec
, + digests: Vec
, + }, + Reject { + reason: String, + }, + Defer { + reason: String, + }, +} + +///Post to be considered by the list's `PostFilter` stack. +pub struct Post<'list> { + pub list: &'list mut MailingList, + pub from: Address, + pub memberships: &'list [ListMembership], + pub bytes: Vec, + pub to: Vec
, + pub action: PostAction, +} + +impl<'list> core::fmt::Debug for Post<'list> { + fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::fmt::Result { + fmt.debug_struct("Post") + .field("list", &self.list) + .field("from", &self.from) + .field("members", &format_args!("{}", self.memberships.len())) + .field("bytes", &format_args!("{}", self.bytes.len())) + .field("to", &self.to.as_slice()) + .field("action", &self.action) + .finish() + } +} + +///Filter that modifies and/or verifies a post candidate. On rejection, return a string +///describing the error and optionally set `post.action` to `Reject` or `Defer` +pub trait PostFilter { + fn feed<'list>( + self: Box, + post: &'list mut Post<'list>, + ) -> std::result::Result<&'list mut Post<'list>, String>; +} + +///Check that submitter can post to list, for now it accepts everything. +pub struct PostRightsCheck; +impl PostFilter for PostRightsCheck { + fn feed<'list>( + self: Box, + post: &'list mut Post<'list>, + ) -> std::result::Result<&'list mut Post<'list>, String> { + Ok(post) + } +} + +///Ensure message contains only `\r\n` line terminators, required by SMTP. +pub struct FixCRLF; +impl PostFilter for FixCRLF { + fn feed<'list>( + self: Box, + post: &'list mut Post<'list>, + ) -> std::result::Result<&'list mut Post<'list>, String> { + use std::io::prelude::*; + let mut new_vec = Vec::with_capacity(post.bytes.len()); + for line in post.bytes.lines() { + new_vec.extend_from_slice(line.unwrap().as_bytes()); + new_vec.extend_from_slice(b"\r\n"); + } + post.bytes = new_vec; + Ok(post) + } +} + +///Add `List-*` headers +pub struct AddListHeaders; +impl PostFilter for AddListHeaders { + fn feed<'list>( + self: Box, + post: &'list mut Post<'list>, + ) -> std::result::Result<&'list mut Post<'list>, String> { + let (mut headers, body) = melib::email::parser::mail(&post.bytes).unwrap(); + let list_id = post.list.list_id(); + headers.push((&b"List-ID"[..], list_id.as_bytes())); + let list_post = post.list.list_post(); + let list_unsubscribe = post.list.list_unsubscribe(); + let list_archive = post.list.list_archive(); + if let Some(post) = list_post.as_ref() { + headers.push((&b"List-Post"[..], post.as_bytes())); + } + if let Some(unsubscribe) = list_unsubscribe.as_ref() { + headers.push((&b"List-Unsubscribe"[..], unsubscribe.as_bytes())); + } + if let Some(archive) = list_archive.as_ref() { + headers.push((&b"List-Archive"[..], archive.as_bytes())); + } + let mut new_vec = Vec::with_capacity( + headers + .iter() + .map(|(h, v)| h.len() + v.len() + ": \r\n".len()) + .sum::() + + "\r\n\r\n".len() + + body.len(), + ); + for (h, v) in headers { + new_vec.extend_from_slice(&h); + new_vec.extend_from_slice(b": "); + new_vec.extend_from_slice(&v); + new_vec.extend_from_slice(b"\r\n"); + } + new_vec.extend_from_slice(b"\r\n\r\n"); + new_vec.extend_from_slice(&body); + + post.bytes = new_vec; + Ok(post) + } +} + +///Adds `Archived-At` field, if configured. +pub struct ArchivedAtLink; +impl PostFilter for ArchivedAtLink { + fn feed<'list>( + self: Box, + post: &'list mut Post<'list>, + ) -> std::result::Result<&'list mut Post<'list>, String> { + Ok(post) + } +} + +///Assuming there are no more changes to be done on the post, it finalizes which list members +///will receive the post in `post.action` field. +pub struct FinalizeRecipients; +impl PostFilter for FinalizeRecipients { + fn feed<'list>( + self: Box, + post: &'list mut Post<'list>, + ) -> std::result::Result<&'list mut Post<'list>, String> { + let mut recipients = vec![]; + let mut digests = vec![]; + let email_from = post.from.get_email(); + for member in post.memberships { + if member.digest { + if (member.address == email_from && member.receive_own_posts) + || (member.address != email_from) + { + digests.push(member.into_address()); + } + continue; + } + if (member.address == email_from && member.receive_own_posts) + || (member.address != email_from) + { + recipients.push(member.into_address()); + } + // TODO: + // - check for duplicates (To,Cc,Bcc) + // - send confirmation to submitter + } + post.action = PostAction::Accept { + recipients, + digests, + }; + Ok(post) + } +}