cargo fmt
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defa39de28
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1 changed files with 52 additions and 29 deletions
55
src/main.rs
55
src/main.rs
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@ -1,11 +1,11 @@
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use email_address_parser::EmailAddress;
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use fqdn::FQDN;
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use std::collections::HashMap;
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use std::env;
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use std::fs::File;
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use std::io::{self, BufRead};
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use std::path::Path;
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use std::str::FromStr;
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use fqdn::FQDN;
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use email_address_parser::EmailAddress;
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#[derive(Debug)]
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struct AliasFile {
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@ -24,7 +24,10 @@ fn main() {
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let mut alias_files: Vec<AliasFile> = Vec::new();
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for i in (1..args.len()).step_by(2) {
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if let Ok(lines) = read_lines(&args[i]) {
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alias_files.push(AliasFile{content: lines, default_domain: FQDN::from_str(&args[i+1]).unwrap()});
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alias_files.push(AliasFile {
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content: lines,
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default_domain: FQDN::from_str(&args[i + 1]).unwrap(),
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});
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}
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}
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println!("{}", generate_sieve_script(parse_alias_to_map(alias_files)));
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@ -33,15 +36,19 @@ fn main() {
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fn generate_sieve_script(redirects: AliasMap) -> String {
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let mut script: String = "require [\"envelope\", \"copy\"];\n\n".to_string();
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for (redirect, destinations) in redirects {
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script += format!("if envelope :is \"to\" \"{}\" {{\n{}}}\n", redirect,
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{
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script += format!("if envelope :is \"to\" \"{}\" {{\n{}}}\n", redirect, {
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let mut subscript: String = String::new();
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for destination in destinations.iter().rev().skip(1).rev() {
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subscript += format!(" redirect :copy \"{destination}\";\n").as_str();
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}
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subscript + format!(" redirect \"{}\";\n", destinations.iter().next_back().unwrap()).as_str()
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}
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).as_str();
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subscript
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+ format!(
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" redirect \"{}\";\n",
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destinations.iter().next_back().unwrap()
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)
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.as_str()
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})
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.as_str();
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}
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script
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}
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@ -58,13 +65,21 @@ fn parse_alias_to_map(alias_files: Vec<AliasFile>) -> AliasMap {
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if destination.is_empty() {
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continue;
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}
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let redirects: Vec<EmailAddress> = line.split_at(line.find(char::is_whitespace).unwrap_or(0)).1.split(' ')
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.filter(|address| address.trim().to_string().replace(',',"") != "").map(|addr| to_mailaddress(addr, &alias_file.default_domain)).collect();
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let redirects: Vec<EmailAddress> = line
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.split_at(line.find(char::is_whitespace).unwrap_or(0))
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.1
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.split(' ')
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.filter(|address| address.trim().to_string().replace(',', "") != "")
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.map(|addr| to_mailaddress(addr, &alias_file.default_domain))
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.collect();
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if redirects.is_empty() {
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continue;
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}
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destinations.push(to_mailaddress(destination, &alias_file.default_domain));
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redirect_map.insert(to_mailaddress(destination, &alias_file.default_domain), redirects);
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redirect_map.insert(
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to_mailaddress(destination, &alias_file.default_domain),
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redirects,
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);
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}
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}
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let mut changed = true;
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@ -75,9 +90,13 @@ fn parse_alias_to_map(alias_files: Vec<AliasFile>) -> AliasMap {
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for forward_to in redirect_map.get(destination).unwrap() {
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if let Some(new_redirects) = redirect_map.get(forward_to) {
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changed = true;
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all_new_redirects.entry(destination.clone()).or_insert(redirect_map.get(destination).unwrap().clone())
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all_new_redirects
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.entry(destination.clone())
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.or_insert(redirect_map.get(destination).unwrap().clone())
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.retain(|dest| *dest != *forward_to);
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all_new_redirects.entry(destination.clone()).and_modify(|d| d.extend(new_redirects.iter().cloned()));
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all_new_redirects
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.entry(destination.clone())
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.and_modify(|d| d.extend(new_redirects.iter().cloned()));
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}
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}
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}
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@ -100,12 +119,16 @@ fn to_mailaddress(local_part: &str, default_domain : &FQDN) -> EmailAddress {
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// The output is wrapped in a Result to allow matching on errors.
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// Returns an Iterator to the Reader of the lines of the file.
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fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
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where P: AsRef<Path>, {
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where
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P: AsRef<Path>,
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{
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let file = File::open(filename)?;
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Ok(io::BufReader::new(file).lines())
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}
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fn print_help() {
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print!("Reads a virtual alias file and needs a default domain to append to local paths, e.g.
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./alias_to_sieve example.com.txt example.com");
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print!(
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"Reads a virtual alias file and needs a default domain to append to local paths, e.g.
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./alias_to_sieve example.com.txt example.com"
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);
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}
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