DIRECTORY
Atom USING [GetPropFromList, PutPropOnList], -- needed by ViewerOps.AddProp, FetchProp
BasicTime USING [FromPupTime, GMT, Now, Unpack, Unpacked], -- Now is needed by IO.time
Convert,
FS USING [Error, GetName, nullOpenFile, Open, OpenFile],
GVBasics,
GVRetrieve,
Icons,
IO USING [GetBlock, int, PutFR, rope, STREAM, time], 
MessageWindow,
PeanutProfile USING [activeMailFile, automaticNewMail],
PeanutRetrieve,
PeanutSendMail,
PeanutWindow,
PrincOpsUtils, -- needed by INLINEs in Process
Process,
PutGet,
Rope USING [Cat, Concat, Equal, Fetch, Find, FromChar, FromRefText, ROPE, Size, Substr],
TEditDisplay,
TEditDocument,
TextEdit,
TextNode,
TiogaFileOps,
TiogaMenuOps,
TiogaOps,
UserCredentials USING [Get],
ViewerClasses USING [Viewer],
ViewerEvents USING [RegisterEventProc, ViewerEvent],
ViewerOps USING [AddProp, EnumerateViewers, EnumProc, FetchProp, OpenIcon, PaintViewer, SaveViewer, SetNewVersion],
ViewerTools USING [MakeNewTextViewer];

PeanutRetrieveImpl: CEDAR MONITOR
IMPORTS Atom, BasicTime, Convert, FS, GVRetrieve, IO, MessageWindow, PeanutProfile, PeanutSendMail, PeanutWindow, PrincOpsUtils, Process, PutGet, Rope, TEditDisplay, TextEdit, TextNode, TiogaFileOps, TiogaMenuOps, TiogaOps, UserCredentials, ViewerEvents, ViewerOps, ViewerTools
EXPORTS PeanutRetrieve
= BEGIN

ROPE: TYPE = Rope.ROPE;
Viewer: TYPE = ViewerClasses.Viewer;
RName: TYPE = GVBasics.RName;

TiogaCTRL: GVBasics.ItemType = LOOPHOLE[1013B]; -- an item containing tioga formatting

ReportRope: PROCEDURE [r: ROPE] = { PeanutWindow.OutputRope[r] };

GetNewMsgs: PUBLIC ENTRY PROC [open: BOOL _ TRUE] =
{ ENABLE UNWIND => NULL; [] _ InternalGetNewMsgs[open]; };

peanutProp: ATOM = $PeanutMailFileName;

SetMailFileName: PROC[v: Viewer, name: ROPE] = {
ViewerOps.AddProp[viewer: v, prop: peanutProp, val: name];
};

GetMailFileName: PROC[v: Viewer] RETURNS[ROPE] = {
WITH ViewerOps.FetchProp[viewer: v, prop: peanutProp] SELECT FROM
rope: ROPE => RETURN[rope];
ENDCASE => RETURN[NIL];
};

FindMailViewer: PUBLIC PROC[name: ROPE] RETURNS[viewer: Viewer _ NIL] = {
Test: ViewerOps.EnumProc -- PROC[v: Viewer] RETURNS[continue: BOOL _ TRUE] -- = {
rope: ROPE = GetMailFileName[v];
IF rope#NIL AND Rope.Equal[rope, name] THEN { viewer _ v; RETURN[FALSE] };
};
ViewerOps.EnumerateViewers[Test];
};

GetMailViewer: PUBLIC ENTRY PROC[name: ROPE] RETURNS [mailViewer: Viewer] = {
ENABLE UNWIND => NULL;
mailViewer _ InternalGetMailViewer[name];
};

InternalGetMailViewer: INTERNAL PROC[name: ROPE] RETURNS [mailViewer: Viewer] = {
mailViewer _ FindMailViewer[name];
IF mailViewer=NIL THEN {
file: ROPE _ Rope.Concat[name, ".mail"];
fh: FS.OpenFile _ FS.nullOpenFile;
mailDoc: TextNode.Ref _ NIL;
fh _ FS.Open[file ! FS.Error => IF error.group=user THEN CONTINUE];
IF fh#FS.nullOpenFile THEN {
file _ FS.GetName[fh].fullFName;
mailDoc _ PutGet.FromFileC[fh];
}
ELSE {
styleProp: ROPE = "(mail) style";
mailDoc _ TextEdit.DocFromNode[TextEdit.FromRope[file]];
TRUSTED { TiogaOps.PutProp[LOOPHOLE[mailDoc], $Prefix, styleProp] };
};
mailViewer _ ViewerTools.MakeNewTextViewer[info: [
name: file, file: file, data: mailDoc,
icon: PeanutWindow.messageSetIcon, iconic: TRUE
]];
SetMailFileName[mailViewer, name];
[] _ ViewerEvents.RegisterEventProc[proc: MessageSetHasBeenEdited,
event: edit, filter: mailViewer, before: TRUE];
[] _ ViewerEvents.RegisterEventProc[proc: MessageSetHasBeenSaved,
event: save, filter: mailViewer, before: FALSE];
TiogaMenuOps.DefaultMenus[mailViewer];
TiogaMenuOps.FirstLevelOnly[mailViewer];
};
};

InternalGetNewMsgs: INTERNAL PROC [open: BOOL _ TRUE] RETURNS [numRetrieved: INT] =
{
allOK: BOOL_ TRUE;
mailViewer: Viewer;
firstHeader: TiogaFileOps.Ref;

StashNewMessages: PROC [retrieveOK: BOOL] RETURNS[doRemoteFlush: BOOL] =
{ 
allOK _ allOK AND retrieveOK;
ViewerOps.SaveViewer[mailViewer]; -- doesn't return until the save is complete
RETURN[retrieveOK AND flushRemoteMail];
};

mailViewer _ InternalGetMailViewer[PeanutProfile.activeMailFile];
[numRetrieved, firstHeader] _ AddNewMessages[StashNewMessages, mailViewer];
IF numRetrieved = 0 THEN {
ReportRope["\nNo messages were retrieved"]; RETURN};
IF mailViewer.iconic AND PeanutProfile.automaticNewMail THEN NULL
ELSE TRUSTED {
tdd: TEditDocument.TEditDocumentData _ NARROW[mailViewer.data];
TEditDisplay.EstablishLine[tdd, [LOOPHOLE[firstHeader],0]];
ViewerOps.PaintViewer[mailViewer, client] };
IF ~allOK THEN ReportRope["\nSome messages may not have been retrieved"];
IF open AND mailViewer.iconic THEN ViewerOps.OpenIcon[mailViewer];
};

MessageSetHasBeenEdited: PROC[viewer: Viewer,
event: ViewerEvents.ViewerEvent, before: BOOL] RETURNS[abort: BOOL _ FALSE] = {
IF before THEN {
viewer.icon _ PeanutWindow.dirtyMessageSetIcon;
IF viewer.iconic THEN ViewerOps.PaintViewer[viewer: viewer, hint: all]; };
};

MessageSetHasBeenSaved: PROC [viewer: Viewer,
event: ViewerEvents.ViewerEvent, before: BOOL] RETURNS[abort: BOOL _ FALSE] = {
IF NOT before THEN {
viewer.icon _ PeanutWindow.messageSetIcon;
IF viewer.iconic THEN ViewerOps.PaintViewer[viewer: viewer, hint: all]; };
};

CopyMessages: PUBLIC PROC [to: ROPE, delete: BOOL] = { OPEN TiogaOps;
 sourceViewer, destViewer: Viewer;
destDoc, sourceDoc, destLast, sourceLast, afterSource: Ref;
start, end: Location;
level: SelectionGrain;
caretBefore, pendingDelete: BOOL;
lockedPrimary, lockedSecondary, lockedDest, lockedSource: BOOL _ FALSE;

TopParent: PROC [node, root: Ref] RETURNS [parent: Ref] = {
DO
parent _ Parent[node];
IF parent=root THEN RETURN [node];
node _ parent;
ENDLOOP };

Cleanup: PROC = {
IF lockedPrimary THEN UnlockSel[primary];
IF lockedSecondary THEN UnlockSel[secondary];
IF lockedDest THEN Unlock[destDoc];
IF lockedSource THEN Unlock[sourceDoc];
};

destViewer _ GetMailViewer[to];
LockSel[primary]; lockedPrimary _ TRUE;
[sourceViewer, start, end, level, caretBefore, pendingDelete] _ TiogaOps.GetSelection[];
IF sourceViewer=NIL OR sourceViewer.class.flavor#$Text THEN {
UnlockSel[primary]; ReportRope["\nSelect message(s)."]; RETURN };
LockSel[secondary]; lockedSecondary _ TRUE;
destDoc _ ViewerDoc[destViewer];
Lock[destDoc]; lockedDest _ TRUE;
sourceDoc _ ViewerDoc[sourceViewer];
IF sourceDoc#destDoc THEN { Lock[sourceDoc]; lockedSource _ TRUE };
destLast _ LastChild[destDoc];
sourceLast _ TopParent[end.node, sourceDoc];
afterSource _ Next[sourceLast];
SelectBranches[ -- source
viewer: sourceViewer, level: branch, caretBefore: FALSE,
pendingDelete: delete, which: primary,
start: TopParent[start.node, sourceDoc], end: sourceLast];
SelectBranches[ -- destination 
viewer: destViewer, start: destLast, end: destLast,
level: branch, caretBefore: FALSE, pendingDelete: FALSE, which: secondary];
ToSecondary[];
IF ~delete THEN -- restore original selection
SetSelection[sourceViewer, start, end, level, caretBefore, pendingDelete, primary]
ELSE IF afterSource # NIL THEN SelectPoint[sourceViewer, [afterSource,0], primary]
ELSE CancelSelection[primary];
ReportRope[IF delete THEN "\nMoved to " ELSE "\nCopied to "];
ReportRope[to];
Cleanup[];
};

msgPollingInterval: INT_ 300; 	-- Number of seconds between mailbox polling.
flushRemoteMail: BOOLEAN_ TRUE;
gvRetrieveHandle: GVRetrieve.Handle_ NIL; -- cookie for receiving messages.

OpenConnection: PUBLIC PROC[user: RName] = {
CloseConnection[];
NewUser[user] ;
};

CloseConnection: PUBLIC PROC[] = {
IF gvRetrieveHandle # NIL THEN{
GVRetrieve.Close[gvRetrieveHandle]; gvRetrieveHandle_ NIL};
};

NewUser: PUBLIC PROC[user: RName] = {
IF gvRetrieveHandle = NIL THEN 
gvRetrieveHandle _ GVRetrieve.Create[ msgPollingInterval, WatchMailBox ];
GVRetrieve.NewUser[gvRetrieveHandle, user, UserCredentials.Get[].password ] ;
} ;

lastStateReported: GVRetrieve.MBXState_ unknown;

WatchMailBox: PROC[newState: GVRetrieve.MBXState] = {
ActiveMailFileNotOpen: PROC RETURNS [BOOL] = {
mailViewer: Viewer = FindMailViewer[PeanutProfile.activeMailFile];
RETURN [mailViewer=NIL OR mailViewer.iconic]
};
showTime: BOOL_ TRUE;
status: ROPE;
IF newState = unknown THEN RETURN;
IF (lastStateReported = notEmpty) AND (newState = someEmpty OR newState = allEmpty) THEN
{ status_ NIL; PeanutWindow.SetNewMail[FALSE] }
ELSE SELECT newState FROM
badName   => {status_ "\nYour user name is invalid, please log in"; showTime_ FALSE};
badPwd    => {status_ "\nYour password is invalid"; showTime_ FALSE};
cantAuth  => {status_ "\nCan't check your credentials at this time"; showTime_ FALSE};
userOK    => {status_ "\nYour credentials are OK"; showTime_ FALSE};
allDown   => status_ "\nAll of the mail servers are down";
someEmpty => status_ "\nAll of the mail servers checked are empty";
allEmpty  => {status_ NIL; PeanutWindow.SetNewMail[FALSE]};
notEmpty  => {status_ NIL; PeanutWindow.SetNewMail[TRUE];
IF lastStateReported#notEmpty AND PeanutProfile.automaticNewMail
AND ActiveMailFileNotOpen[] THEN TRUSTED {Process.Detach[FORK ReadMail[]]}
};
ENDCASE   => status_ "\nBad State!";
lastStateReported _ newState;
IF status # NIL THEN
ReportRope[IF showTime THEN status.Concat[IO.PutFR[" at %g", IO.time[]]] ELSE status];
};

ReadMail: ENTRY PROC = TRUSTED {
ENABLE UNWIND => NULL;
numRetrieved: INT;
Process.SetPriority[Process.priorityBackground];
IF (numRetrieved _ InternalGetNewMsgs[FALSE])=0 THEN RETURN;
MessageWindow.Append[IO.PutFR["New mail retrieved:  %g", IO.time[]], TRUE];
MessageWindow.Blink[] };

MessageState: TYPE = { noMore, wasArchived, wasDeleted, OK, retrieveFailed } ;

AddNewMessages: PUBLIC PROC[
FinishedWithServer: PROC[BOOL] RETURNS[BOOL], mailViewer: Viewer] 
RETURNS[numRetrieved: INT, firstHeader: TiogaFileOps.Ref] = {
serverKnown: BOOLEAN _ FALSE;
mailDoc: TiogaOps.Ref _ TiogaOps.ViewerDoc[mailViewer];

IF gvRetrieveHandle = NIL THEN { 		-- Open the connection if it's closed.
gvRetrieveHandle _ GVRetrieve.Create[ msgPollingInterval, WatchMailBox ] ;
GVRetrieve.NewUser[gvRetrieveHandle, PeanutSendMail.userRName,
UserCredentials.Get[].password];
} ;

SELECT gvRetrieveHandle.MailboxState[] FROM
badName, badPwd => GOTO credentialsError;
cantAuth => GOTO noServers; 
ENDCASE; --ok to try 

numRetrieved_ 0;

ReportRope[IO.PutFR["\nCheck for new mail:  %g", IO.time[]]];

DO 						-- Loops over servers.
m, formatting: ROPE;
messageState: MessageState;
timeStamp: GVBasics.Timestamp;
gvSender: RName;        
messages: CARDINAL _ 0;			-- the number of messages read from server.
archivedReported: BOOLEAN _ FALSE;		-- seen an archived message?

noMore: BOOLEAN;				-- TRUE if no more servers.
serverState: GVRetrieve.ServerState;	-- The state of the server.
headerNode: TiogaFileOps.Ref;
serverName: ROPE ;

TRUSTED {headerNode _ LOOPHOLE[TiogaOps.LastChild[mailDoc]]};

[noMore, serverState] _ gvRetrieveHandle.NextServer[];
IF noMore THEN EXIT;			-- Last server?  Then done.
serverKnown _ TRUE;

serverName _ gvRetrieveHandle.ServerName[];
ReportRope["\n"]; ReportRope[serverName]; ReportRope[": "];
IF serverState # notEmpty THEN {
IF serverState = empty THEN ReportRope["empty"]
ELSE ReportRope["didn't respond"] ; 
LOOP; 					-- Skip to the next server.
};

TiogaOps.Lock[mailDoc];
DO 
ENABLE UNWIND => TiogaOps.Unlock[mailDoc];
[messageState, m, formatting, timeStamp, gvSender] _ ReadMessageRecord[] ;
SELECT messageState FROM
noMore => EXIT ;
wasArchived => IF NOT archivedReported THEN
{ archivedReported _ TRUE; ReportRope["(archived messages exist)"]};
OK => NULL;
wasDeleted => NULL;
retrieveFailed => EXIT;
ENDCASE => ERROR;
IF NOT (messageState = wasDeleted) THEN {
DeleteTrailingCRs: PROC [m: ROPE] RETURNS [ROPE] = {
len: INT _ Rope.Size[m];
WHILE len > 0 AND Rope.Fetch[m, len-1] = '\n DO len _ len-1; ENDLOOP;
RETURN [Rope.Substr[m,0,len]] };
GetFieldContents: PROC [name: ROPE, maxLen: INT] RETURNS [contents: ROPE] = {
start: INT _ Rope.Find[m, name];
IF start<0 THEN contents _ "?"
ELSE { 
end: INT;
start _ start + Rope.Size[name];
end _ Rope.Find[m, "\n", start];
IF end <= start THEN contents _ "?"
ELSE IF end > start+maxLen THEN
contents _ Rope.Concat[Rope.Substr[m, start, maxLen-3], "..."]
ELSE contents _ Rope.Substr[m, start, end-start] }};
GetDateFromGMT: PROC[time: BasicTime.GMT] RETURNS[ROPE] = {
unpacked: BasicTime.Unpacked = BasicTime.Unpack[time];
day: NAT = unpacked.day;
month: ROPE = Convert.RopeFromUnpackedTime[unpacked, months, months];
year: NAT = unpacked.year;
RETURN[IO.PutFR["%2g-%g-%02g",
IO.int[day], IO.rope[month.Substr[len: 3]], IO.int[year MOD 100]]];
};
headerDate, headerName, headerSubject, header: ROPE;
messageNode: TiogaFileOps.Ref;
headerNode _ TiogaFileOps.InsertNode[headerNode, FALSE];
IF firstHeader=NIL THEN firstHeader _ headerNode;
TiogaFileOps.SetFormat[headerNode, "header"];
headerDate _ GetDateFromGMT[BasicTime.FromPupTime[timeStamp.time]];
IF Rope.Equal[gvSender, PeanutSendMail.userRName, FALSE] OR
Rope.Equal[gvSender, PeanutSendMail.simpleUserName, FALSE] THEN
headerName  _ Rope.Concat["To: ", GetFieldContents["\nTo: ", 15]]
ELSE headerName _ gvSender;
headerSubject _ GetFieldContents["\nSubject: ", 45];
header _ Rope.Cat["\t", headerDate, "\t", headerName, "\t", headerSubject];
TiogaFileOps.SetContents[headerNode, header];
IF formatting=NIL THEN {
messageNode _ TiogaFileOps.InsertNode[headerNode, TRUE];
TiogaFileOps.SetContents[messageNode, DeleteTrailingCRs[m]] }
ELSE { 
messageRoot, messageFirst, messageLast, headerN: TextNode.Ref;
messageRoot _ PutGet.FromRope[Rope.Cat[Rope.FromChar['\n],m,formatting]];
messageFirst _ TextNode.FirstChild[messageRoot];
TRUSTED { headerN _ LOOPHOLE[headerNode] };
headerN.child _ messageFirst; 
messageLast _ TextNode.LastSibling[messageFirst];
messageLast.last _ TRUE; messageLast.next _ headerN;
messageRoot.child _ NIL; messageRoot.props _ NIL;
};
ViewerOps.SetNewVersion[mailViewer];
ReportRope["."];
messages _ messages + 1;
};
ENDLOOP ; -- Finished reading messages from this server.
TiogaOps.Unlock[mailDoc];
IF FinishedWithServer[messageState#retrieveFailed] THEN
gvRetrieveHandle.Accept[ ! GVRetrieve.Failed =>
{ReportRope["\nFlush of remote messages failed; you may get these messages again"];
CONTINUE}];
IF messageState#retrieveFailed THEN ReportRope[
IO.PutFR[": retrieved %g messages.", IO.int[messages] ]];
numRetrieved_ numRetrieved + messages;
ENDLOOP ; -- End of servers loop, exit.

IF NOT serverKnown THEN GOTO noMailboxes;

EXITS		-- The error reporter for this routine.
noMailboxes => ReportRope[" No mail boxes"];
credentialsError => ReportRope[" Credentials error"];
noServers => ReportRope[" No servers responding"];
}; 

ReadMessageRecord: PROC RETURNS
[messageState: MessageState, m, formatting: ROPE,
timeStamp: GVBasics.Timestamp, gvSender: RName] = {
ENABLE GVRetrieve.Failed => {
ReportRope[ SELECT why FROM
communicationFailure => "communication failure",
noSuchServer =>         "no such server",
connectionRejected =>   "server busy",
badCredentials =>       "bad credentials",
unknownFailure =>	     "unknown Failure",
ENDCASE =>  	     "unknown Error" ];
GOTO gvFailed;      
} ;

msgExists, archived, deleted: BOOLEAN;
item: GVBasics.ItemHeader;
blockSize: NAT = 500;
block: REF TEXT _ NIL;
m _ NIL;

[msgExists, archived, deleted] _ GVRetrieve.NextMessage[ gvRetrieveHandle ];

IF archived THEN messageState _ wasArchived ELSE messageState_ OK;
IF deleted THEN { messageState _ wasDeleted; RETURN};
IF NOT msgExists THEN { messageState _ noMore; RETURN};


[timeStamp, gvSender, ] _ GVRetrieve.StartMessage[ gvRetrieveHandle ] ;
DO
ReadItem: PROC[h: GVRetrieve.Handle] RETURNS[rope: ROPE _ NIL] = {
stream: IO.STREAM = GVRetrieve.GetItem[h];
IF block=NIL THEN block _ NEW[TEXT[blockSize]];
WHILE stream.GetBlock[block]>0 DO
rope _ rope.Concat[Rope.FromRefText[block]];
ENDLOOP;
};
item _ GVRetrieve.NextItem[gvRetrieveHandle];
SELECT item.type FROM
PostMark   => ERROR; 
Sender     => ERROR;
ReturnTo   => ERROR;
Recipients => NULL;
Text       => m _ ReadItem[gvRetrieveHandle];
TiogaCTRL  => formatting _ ReadItem[gvRetrieveHandle];
Capability => NULL;
Audio      => NULL;
updateItem => NULL;
reMail     => NULL;
LastItem   => EXIT;
ENDCASE => LOOP;
ENDLOOP;
EXITS
gvFailed => messageState_ retrieveFailed;
} ;

END.


^File: PeanutRetrieveImpl.mesa      April 1, 1983 2:17 pm
Last edited by Bill Paxton, May 12, 1983 4:11 pm
Last edited by: Pausch, July 14, 1983 3:26 pm
Last edited by Doug Wyatt, December 7, 1983 3:16 pm
************************************************************************
Enumerate top level viewers, looking for one with a matching $PeanutMailFile property
Make this an entry so don't have two Get's at once for same mail file
If the Open succeeded, note the file's full name and read its contents.
Create a document with a single node containing the file name.
Make the document's style Mail.style.
reads any new mail
don't do remote flush if ~retrieveOK
***********************************************************************

***********************************************************************
This establishes a retrieve connection, and sets up a Mail Polling proc
This closes the connection, and invalidates the connection handle.
Establish a new user on this connection. 
This is called when the condition of the mailbox changes
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
This is the routine that actually reads the mail & makes the log entry.
It calls FinishedWithServer to commit the log before it flushes any particular mail server.
Cycle through the servers, until you find one that has mail.
If it has mail, then go for it. 
Step through the servers.
Returns a string of the form dd-mmm-yy (for example, 17-Nov-83)
Restore leading CR.  Get back a root node.
Clear out the links from the messageRoot to help garbage collection.

Flush the mailbox if desired, we've stashed the messages.
This routine reads the messages on this connection, returning messageState = noMore
when there aren't any more.
Now read all the items in the message, terminating on the LastItem, and
skipping the ones that we're not yet interested in.
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