! Control sub-module ! ! ! USER INTERFACE TO THE APMTEL SERVER ON FILESTORE D ! ! History: ! ! 20/2/88 Initial naive unfriendly version written to test SERVER ! 22/2/88 Re-write and re-structure of the code for ease of maintainance ! 3/3/88 Inclusion of REGION untility to allow access to caching mechanism ! 3/3/88 Addition of cache structure access thru insert page to place a ! file into a cache database ! So far this cache is write-only, but I am working on the code to ! allow reading the cache ! 8/3/88 The cache is now read-write ! 10/5/88 Inclusion of Channel 5 - EUCSD pages ! 16/5/88 Channel 5 only indication if server is not running ! 17/5/88 Addition of design module ! 17/5/88 Addition of termlib control for user interface ! %include "level1:graphinc.imp" %include "APMTEL:ins_page.inc" %include "inc:fs.imp" %include "inc:fsutil.imp" %include "inc:util.imp" %include "inc:vtlib.imp" %include "APMTEL:files.inc" %externalroutinespec load fonts %externalroutinespec show screen(%bytearray p(0:23,0:39)) %externalroutinespec design %begin %constinteger server station = 16_35, { Filestore D station number magic number = 16, { The magic number of the APMTEL server my port= 21, { The local port used buf size = 520, { Maximum size of the ether packet true = 1, false = 0 %integer server port, n, c, channel 5 only %byte comm %ownbytearray buffer(0:BUF SIZE)= 0 (*) %bytearray page(0:23,0:39) %integer i, j, page id, channel %string (255) filename, database file %routine show packet(%bytename buf,%integer n) %integer i %for i=0,1,n %cycle print symbol(buf[i]) %repeat newline %end %predicate pending read(%integer port) %integer bit bit=1< timeout*1000 %or bytes#0 %return bytes %end %predicate start talking ether close(my port) {Make sure local port is closed ether open(my port, server station<<8) {Open connection to the SERVER buffer(0) = magic number ether write(my port,buffer(0),1) {And tell the Port 0 mux I want APMTEL n = get ether(myport, buffer, 2) {Are we listening ? ! !If the number of bytes rxd is 0, then the filestore is not up or is busy.... !so tell the user to try again later ! clear frame %if n=0 %start print string("Sorry .... I don't think Filestore D is up!");newline print string("You have to restrict yourself to channel 5 access");newline print string("However, you may retry by selecting a transmitted channel");newline print string("Try again later");newline ! ether close(my port) %false %finish ! !Now, if the remote port number is less than 1, then the server is not running !on the filestore ! server port = buffer(0) - '0' %if server port <1 %start print string("Sorry .... The Server is not running just now!");newline print string("You have to restrict yourself to channel 5 access");newline print string("However, you may retry by selecting a transmitted channel");newline ! ether close(my port) %false %finish print string("Hi - APMTEL SERVER Connected");newline ether close(my port) ether open(my port, server station << 8 ! server port) buffer(0)= 'A' %for i=1,1,length(current user) %cycle buffer(i) = charno(current user,i) %repeat ether write(my port, buffer(0), length(current user)+1) n=get ether (my port, buffer, 5) channel 5 only = false %true %end %bytefn to upper(%byte c) %if 'a' <= c <= 'z' %thenreturn c-'a'+'A' %elsereturn c %end %routine handle ch5 print string("ENTERING THE EUCSD MESSAGE SYSTEM");newline database file = EU CHANNEL 5 FILE %end %routine extract page no (%bytearrayname packet(0:23,0:39), %integername actual) %integer i actual = 0 %for i=0,1,2 %cycle actual = 10*actual + packet(0,i)-'0' %repeat %end %predicate in cache(%bytearrayname buffer(0:BUF SIZE), %bytearrayname p(0:23,0:39)) %integer i %integer page no %integer record no page no = 0 %for i=0,1,3 %cycle page no = page no* 10 + buffer(i) - '0' %if '0' <= buffer(i) <= '9' %repeat %if channel = '5' %then record no = page no %elsec record no = match(page no,channel,database file,1) %if record no # -1 %start %if extract page (record no, p,database file) %then %true %finish %if channel #'5' %then print string("Page not in cache - going for Broadcast") newline %false %end %routine get page from server ether write(my port,buffer(0),n) n= get ether(my port,buffer, 200) %if n> 100 %start %for i=0,1,11 %cycle %for j=0,1,39 %cycle page(i,j) = buffer(i*40+j) %repeat %repeat n= get ether (my port,buffer, 6) %if n > 20 %start %for i=12,1,23 %cycle %for j=0,1,39 %cycle page(i,j) = buffer((i-12) * 40 + j) %repeat %repeat extract page no(page, page id) show screen(page) insert page(page,page id, channel,database file, "Submitted by ".current user) n=get ether(my port,buffer,600) %else print string("SERVER DIED IN MIDDLE OF TRANSMISSION !!!!");newline print string("STOPPING.");newline !!!!! buffer(0)='D' !!!!! ether write(my port,buffer(0),1) !!!!! ether close(my port) !!!!! %stop channel 5 only = true; channel = '5' %finish %else print string("REQUEST DENIED ") show packet(buffer(0),n) newline newline print string("Press a key");newline %cycle; %repeatuntil test symbol # -1 %finish %end %routine carousel(%bytearrayname buffer(0:buf size)); %bytearray temp buffer(0:buf size) %integer i print string("Press a key to exit - This may take some time so be patient".snl) buffer(0)='B' temp buffer=buffer i=n %cycle get page from server buffer=temp buffer n=i %repeatuntil test symbol#-1 %end %externalroutine show comments %integer ch, number, i,j, temp clear frame newline print string(" 0...".extract comments(0,number).snl); newline i=0 %cycle i=i+1 ch=test symbol write(i,3); print string("...".extract comments(i,number).snl) %if (i//10)*10 = i %start print string("".snl); %cycle ch = test symbol %repeatuntil ch#-1 %finish %repeatuntil number<=0 %or ch=32 %end %routine act on (%bytearrayname buffer(0:BUF SIZE), %integer n) %switch entry('B':'H') %label exit %byte comm comm = buffer(0) -> entry(comm) entry('B'): %if %not(in cache(buffer,page)) %start %if channel # '5' %start get page from server %else print string("Sorry - That page is not available");newline %finish %else show screen(page) %finish -> exit entry('C'): comm = buffer(1) %if channel 5 only = true %start print string("Trying to start up server".snl) %if start talking %start print string("Server restarted".snl) %else buffer(1) = '5' comm=buffer(1) channel='5' print string("Failed".snl) %finish %finish newline channel = comm %if channel < '1' %or channel > '5' %start print string("1..BBC1"); newline; print string("2..BBC2");newline print string("3..STV");newline;print string("4..Channel 4");newline print string("5..CHANNEL EUCSD");newline newline newline print string("Press a key") %cycle ; %repeatuntil test symbol # -1 %else %if channel='5' %start handle ch5 %else etherwrite(my port,buffer(0), n) n=get ether(my port, buffer, 60) database file = APMTEL FILE %finish %finish -> exit entry('D'): %if channel 5 only # true %start ether write(my port,buffer(0),1) n=get ether(my port,buffer, 1) ether close(my port) %finish print string(" Goodbye, call again soon.");newline;newline;newline -> exit entry('E'): %if channel = '5' %start print string("Cannot force a download on EUCSD pages!!!!! ");newline %else buffer(0) = 'B' get page from server %finish -> exit entry('F'): newline print string("Please type the name of the file to save this too ? :-"); read line(filename) open output(1,filename) select output(1) %for i=0,1,23 %cycle %for j=0,1,39 %cycle print symbol(page(i,j)) %repeat %repeat close output select output(0) -> exit entry('G'): design clear -> exit entry('H'): %if channel = '5' %start print string("Cannot carousel on CHANNEL 5".snl) %else carousel(buffer) %finish exit: print string("Got to exit ok".snl) %end %bytefn show menu %ownbytearray table('1':'7') = 'B','E','C','F','H','G','D' %integer c clear frame set shade(reverse+intense+blink+underline) newline newline print string(" Menu");newline newline set shade(0) print string("1...Get a page");newline print string("2...Force a get from server");newline print string("3...Change channel");newline print string("4...Save page to file");newline print string("5...Carousel page");newline print string("6...Design a page");newline print string("7...QUIT");newline newline newline print string("CHANNEL ".tostring(channel).":") clear line %cycle c = test symbol %repeatuntil '1' <= c <= '7' newline %return(table(c)) %end %routine insert(%integer c,%bytearrayname b,%integername n) %integer i %for i=n,-1,0 %cycle b(i+1)=b(i) %repeat n = n + 1 b(0)=c %end set video mode(specialpad) clear frame newline channel = '1' database file = APMTEL FILE channel 5 only = true clear %if start talking %then channel 5 only = false %elsec %start handle ch5 channel = '5' %finish print string("LOADING FONTS ");newline load fonts { Load the teletext fonts up %cycle comm = show menu { Get a menu choice ..... buffer(0) = comm n = 0 %if comm='B' %or comm='H' %or comm='E' %start %if channel = '5' %then show comments print string("Which page ?:") %finishelsec %if comm='C' %then print string("Which channel ?:") %if comm#'D' %and comm#'G' %start %cycle n=n+1 read symbol(j) buffer(n) = j %repeatuntil buffer(n) <= 32 %finish newline newline act on(buffer,n) %repeatuntil comm='D' %if channel 5 only # true %then etherclose (myport) %stop %endofprogram