Send iMessages in OS X via Terminal

Question

Hello,
i want to send pictures in iMessage via Terminal, Konsole / AppleScript.
osascript -e 'tell application "Messages" to send "Hello World" to "John"'
but there is an error:
31:67: execution error: Messages got an error: Can’t make "John" into type buddy, text chat. (-1700)
(John is a right contact)
And how can I send pictures via Terminal?
osascript -e 'tell application "Messages" to send "/pictures/pic01.png" to "John"'
How can I tell OS X that I want to send a document and not a text?
Thanks for your help!

Answer 1

Hi,
In the beginning iChat was AIM Only.
Much of the AppleScript written for the app is written with this is mind.
"picc-in-chars" are treated as Files whether they are sent as File Only with no Chat open or as Files within the Chat (which then displays the pics in most cases).
The Auto Accept Script  may give some clues.
It reads this for the Receipt of files and pic-in-Chats.
To access this go to the Messages > Preferences > General section.
At the bottom is  drop down for AppleScript with an option to show the Folder.
This no longer displays the ~/Library/Scripts/Messages folder that Messages 7.x.x did (as did earlier version of iChat) that were used in the Alerts tab.
If you open  the Script you can see it refers to "theBuddy" for some of the other Events.
I am not sure this can be applied to the iMessages side of things.
The Dictionary for Messages has this
Your Script also appears to think you have a Pictures Folder at the top level of the Hard Drive (Along with Applications, Library, System, Users  etc.)
Did you mean your home folder/Pictures (As In ~/Pictures)
The Dictionary also defines "Buddies" as being related to specific Services
this may include iMessages.
I was once sent this script that displays  a Status messages that refers to who you are chatting with by using the name of the window (it has  section to exclued other windows)
As text
using terms from application "Messages"
    on av chat started
        tell application "Messages"
            set allChatWindows to every window
            set completed to false
            repeat with currentWindow in allChatWindows
                set windowname to the name of currentWindow
                if (not completed) then
                    if ((windowname is not ¬
                        "Audio/Video") and (windowname starts with ¬
                        "Audio" or windowname starts with ¬
                        "Video")) then
                        set status message to windowname
                        set completed to true
                    else if (windowname does not contain ¬
                        "General" and windowname does not contain ¬
                        "Doctor" and windowname does not contain ¬
                        "Activity" and windowname does not contain ¬
                        "File" and windowname does not contain ¬
                        "Accounts" and windowname does not contain ¬
                        "Messages" and windowname does not contain ¬
                        "Alerts" and windowname does not contain ¬
                        "Audio/Video" and windowname does not contain ¬
                        "Chax" and windowname does not contain ¬
                        "AIM" and windowname does not contain ¬
                        "Contacts" and windowname does not start with ¬
                        "Chat" and windowname does not contain ¬
                        "Chats" and windowname does not contain ¬
                        "Bonjour") then
                        set status message to "Audio Chat with " & windowname
                        set completed to true
                    end if
                    delay 0.2
                end if
            end repeat
            set volume input volume 85
            delay 0.2
            set volume output volume 80
            delay 0.2
            set status to away
        end tell
    end av chat started
end using terms from
The end bit tweaks your volume Input and output from your regular settings.
I hope that give you some clues.
10:18 pm      Saturday; January 18, 2014
  iMac 2.5Ghz 5i 2011 (Mavericks 10.9)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad