mail: revert removing.

1 files changed, 0 insertions, 144 deletions

diff --git a/deno/mail-relay/mail-parsing.ts b/deno/mail-relay/mail-parsing.ts
deleted file mode 100644
index 8e9697d..0000000
--- a/deno/mail-relay/mail-parsing.ts
+++ /dev/null
@@ -1,144 +0,0 @@
-import emailAddresses from "email-addresses";
-
-class MailParsingError extends Error {}
-
-function parseHeaderSection(section: string) {
-  const headers = [] as [key: string, value: string][];
-
-  let field: string | null = null;
-  let lineNumber = 1;
-
-  const handleField = () => {
-    if (field == null) return;
-    const sepPos = field.indexOf(":");
-    if (sepPos === -1) {
-      throw new MailParsingError(
-        `Expect ':' in the header field line: ${field}`,
-      );
-    }
-    headers.push([field.slice(0, sepPos).trim(), field.slice(sepPos + 1)]);
-    field = null;
-  };
-
-  for (const line of section.trimEnd().split(/\r?\n|\r/)) {
-    if (line.match(/^\s/)) {
-      if (field == null) {
-        throw new MailParsingError("Header section starts with a space.");
-      }
-      field += line;
-    } else {
-      handleField();
-      field = line;
-    }
-    lineNumber += 1;
-  }
-
-  handleField();
-
-  return headers;
-}
-
-function findFirst(fields: readonly [string, string][], key: string) {
-  for (const [k, v] of fields) {
-    if (key.toLowerCase() === k.toLowerCase()) return v;
-  }
-  return undefined;
-}
-
-function findMessageId(fields: readonly [string, string][]) {
-  const messageIdField = findFirst(fields, "message-id");
-  if (messageIdField == null) return undefined;
-
-  const match = messageIdField.match(/\<(.*?)\>/);
-  if (match != null) {
-    return match[1];
-  } else {
-    console.warn(`Invalid syntax in header 'message-id': ${messageIdField}`);
-    return undefined;
-  }
-}
-
-function findDate(fields: readonly [string, string][]) {
-  const dateField = findFirst(fields, "date");
-  if (dateField == null) return undefined;
-
-  const date = new Date(dateField);
-  if (isNaN(date.getTime())) {
-    console.warn(`Invalid date string in header 'date': ${dateField}`);
-    return undefined;
-  }
-  return date;
-}
-
-function findFrom(fields: readonly [string, string][]) {
-  const fromField = findFirst(fields, "from");
-  if (fromField == null) return undefined;
-
-  const addr = emailAddresses.parseOneAddress(fromField);
-  return addr?.type === "mailbox" ? addr.address : undefined;
-}
-
-function findRecipients(fields: readonly [string, string][]) {
-  const headers = ["to", "cc", "bcc", "x-original-to"];
-  const recipients = new Set<string>();
-  for (const [key, value] of fields) {
-    if (headers.includes(key.toLowerCase())) {
-      emailAddresses
-        .parseAddressList(value)
-        ?.flatMap((a) => (a.type === "mailbox" ? a : a.addresses))
-        ?.forEach(({ address }) => recipients.add(address));
-    }
-  }
-  return recipients;
-}
-
-function parseSections(raw: string) {
-  const twoEolMatch = raw.match(/(\r?\n)(\r?\n)/);
-  if (twoEolMatch == null) {
-    throw new MailParsingError(
-      "No header/body section separator (2 successive EOLs) found.",
-    );
-  }
-
-  const [eol, sep] = [twoEolMatch[1], twoEolMatch[2]];
-
-  if (eol !== sep) {
-    console.warn("Different EOLs (\\r\\n, \\n) found.");
-  }
-
-  return {
-    header: raw.slice(0, twoEolMatch.index!),
-    body: raw.slice(twoEolMatch.index! + eol.length + sep.length),
-    eol,
-    sep,
-  };
-}
-
-export type ParsedMail = Readonly<{
-  header: string;
-  body: string;
-  sep: string;
-  eol: string;
-  headers: readonly [string, string][];
-  messageId: string | undefined;
-  date: Date | undefined;
-  from: string | undefined;
-  recipients: readonly string[];
-}>;
-
-export function simpleParseMail(raw: string): ParsedMail {
-  const sections = Object.freeze(parseSections(raw));
-  const headers = Object.freeze(parseHeaderSection(sections.header));
-  const messageId = findMessageId(headers);
-  const date = findDate(headers);
-  const from = findFrom(headers);
-  const recipients = Object.freeze([...findRecipients(headers)]);
-  return Object.freeze({
-    ...sections,
-    headers,
-    messageId,
-    date,
-    from,
-    recipients,
-  });
-}