(Go) Search IMAP Mailbox for Email Matching Criteria

Searching an IMAP mailbox for messages that match search criteria.

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    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    imap := chilkat.NewImap()

    // Connect to an IMAP server.
    // Use TLS
    imap.SetSsl(true)
    imap.SetPort(993)
    success := imap.Connect("imap.someMailServer.com")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Login
    success = imap.Login("myLogin","myPassword")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // messageSet is a MessageSet
    // We can choose to fetch UIDs or sequence numbers.
    fetchUids := true

    // Here are examples of different search criteria:

    // Return all messages.
    allMsgs := "ALL"

    // Search for already-answered emails.
    answered := "ANSWERED"

    // Search for messages on a specific date.
    // The date string is DD-Month-YYYY where Month is
    // Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, or Dec.
    onDate := "SENTON 05-Mar-2007"

    // Search for messages between two dates.  SENTBEFORE
    // finds emails sent before a date, and SENTSINCE finds
    // email sent on or after a date.  The "AND" operation
    // is implied by joining criteria, separated by spaces.
    betweenDates := "SENTSINCE 01-Mar-2007 SENTBEFORE 05-Mar-2007"

    // Another example of AND: find all unanswered emails
    // sent after 04-Mar-2007 with "Problem" in the subject:
    complexSearch1 := "UNANSWERED SENTSINCE 04-Mar-2007 Subject \"Problem\""

    // Find messages with a specific string in the body:
    bodySearch := "BODY \"problem solved\""

    // Using OR.  The syntax is OR <criteria1> <criteria2>. 
    // The "OR" comes first, followed by each criteria.
    // For example, to match all emails with "Help" or "Question" in the subject.
    // You'll notice that literal strings may be quoted or unquoted.
    // If a literal contains SPACE characters, quote it:
    orSearch := "OR SUBJECT Help SUBJECT Question"

    // ----------------------------------------------
    // Strings are case-insensitive when searching....
    // ----------------------------------------------

    // Find all emails sent from yahoo.com addresses:
    fromSearch := "FROM yahoo.com"
    // Find all emails sent from anyone with "John" in their name:
    johnSearch := "FROM John"

    // Find emails with the RECENT flag set:
    recentSearch := "RECENT"

    // Find emails that don't have the recent flag set:
    notRecentSearch := "NOT RECENT"
    // This is synonymous with "OLD":
    oldSearch := "OLD"

    // Find all emails marked for deletion:
    markedForDeleteSearch := "DELETED"

    // Find all emails having a specified header field with a value
    // containing a substring:
    headerSearch := "HEADER DomainKey-Signature paypal.com"

    // Find any emails having a specific header field.  If the 
    // 2nd argument to the "HEADER" criteria is an empty string,
    // any email having the header field is returned regardless
    // of the header field's content.
    // Find any emails with a DomainKey-Signature field:
    headerExistsSearch := "HEADER DomainKey-Signature \"\""

    // Find NEW emails: these are emails that have the RECENT flag
    // set, but not the SEEN flag:
    newSearch := "NEW"

    // Find emails larger than a certain number of bytes:
    sizeLargerSearch := "LARGER 500000"

    // Find emails marked as seen or not already seen:
    seenSearch := "SEEN"
    notSeenSearch := "NOT SEEN"

    // Find emails having a given substring in the TO header field:
    toSearch := "TO support@chilkatsoft.com"
    // A more long-winded way to do the same thing:
    toSearch2 := "HEADER TO support@chilkatsoft.com"

    // Find emails smaller than a size in bytes:
    smallerSearch := "SMALLER 30000"

    // Find emails that have a substring anywhere in the header
    // or body:
    fullSubstringSearch := "TEXT \"Zip Component\""

    // Pass any of the above strings here to test a search:
    messageSet := imap.Search(orSearch,fetchUids)
    if imap.LastMethodSuccess() == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Fetch the email headers into a bundle object:
    // bundle is a EmailBundle
    bundle := imap.FetchHeaders(messageSet)
    if imap.LastMethodSuccess() == false {
        messageSet.DisposeMessageSet()
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Display the Subject and From of each email.
    i := 0
    for i < bundle.MessageCount() {
        // email is a Email
        email := bundle.GetEmail(i)

        fmt.Println(*email.GetHeaderField("Date"))
        fmt.Println(email.Subject())
        fmt.Println(email.From())
        fmt.Println("--")

        email.DisposeEmail()

        i = i + 1
    }

    // Disconnect from the IMAP server.
    success = imap.Disconnect()

    messageSet.DisposeMessageSet()
    bundle.DisposeEmailBundle()

    imap.DisposeImap()