#! /usr/bin/env python

"""GUI interface to webchecker.

This works as a Grail applet too!  E.g.

  <APPLET CODE=wcgui.py NAME=CheckerWindow></APPLET>

Checkpoints are not (yet?) supported.

User interface:

Enter a root to check in the text entry box.  To enter more than one root, 
enter each root and press <Return>.

Command buttons Start, Stop and "Check one" govern the checking process in 
the obvious way.  Start and "Check one" also enter the root from the text 
entry box if one is present.

A series of checkbuttons determines whether the corresponding output panel 
is shown.  List panels are also automatically shown or hidden when their 
status changes between empty to non-empty.  There are six panels:

Log        -- raw output from the checker (-v, -q affect this)
To check   -- local links discovered but not yet checked
Off site   -- links discovered that point off site
Checked    -- local links that have been checked
Bad links  -- links that failed upon checking
Details    -- details about one URL; double click on a URL in any of
              the aboce list panels (not in Log) will show that URL

XXX There ought to be a list of pages known to contain at least one
bad link.

XXX The checking of off site links should be made more similar to the 
checking of local links (even if they are checked after all local links are 
checked).

Use your window manager's Close command to quit.

Command line options:

-m bytes  -- skip HTML pages larger than this size (default %(MAXPAGE)d)
-n        -- reports only, no checking (use with -R)
-q        -- quiet operation (also suppresses external links report)
-v        -- verbose operation; repeating -v will increase verbosity

Command line arguments:

rooturl   -- URL to start checking
             (default %(DEFROOT)s)

XXX The command line options should all be GUI accessible.

XXX The roots should be visible as a list (?).

XXX The multipanel user interface is bogus.

"""

# ' Emacs bait


import sys
import getopt
import string
from Tkinter import *
import tktools
import webchecker
import random

# Override some for a weaker platform
if sys.platform == 'mac':
    webchecker.DEFROOT = "http://grail.cnri.reston.va.us/"
    webchecker.MAXPAGE = 50000
    webchecker.verbose = 4

def main():
    try:
	opts, args = getopt.getopt(sys.argv[1:], 'm:qv')
    except getopt.error, msg:
	sys.stdout = sys.stderr
	print msg
	print __doc__%vars(webchecker)
	sys.exit(2)
    for o, a in opts:
	if o == '-m':
	    webchecker.maxpage = string.atoi(a)
	if o == '-q':
	    webchecker.verbose = 0
	if o == '-v':
	    webchecker.verbose = webchecker.verbose + 1
    root = Tk(className='Webchecker')
    root.protocol("WM_DELETE_WINDOW", root.quit)
    c = CheckerWindow(root)
    if args:
    	for arg in args[:-1]:
    	    c.addroot(arg)
    	c.suggestroot(args[-1])
    root.mainloop()


class CheckerWindow(webchecker.Checker):

    def __init__(self, parent, root=webchecker.DEFROOT):
	self.__parent = parent
	self.__controls = Frame(parent)
	self.__controls.pack(side=TOP, fill=X)
	self.__label = Label(self.__controls, text="Root URL:")
	self.__label.pack(side=LEFT)
	self.__rootentry = Entry(self.__controls, width=60)
	self.__rootentry.pack(side=LEFT)
	self.__rootentry.bind('<Return>', self.enterroot)
	self.__rootentry.focus_set()
	self.__running = 0
	self.__start = Button(self.__controls, text="Run", command=self.start)
	self.__start.pack(side=LEFT)
	self.__stop = Button(self.__controls, text="Stop", command=self.stop,
			     state=DISABLED)
	self.__stop.pack(side=LEFT)
	self.__step = Button(self.__controls, text="Check one", command=self.step)
	self.__step.pack(side=LEFT)
	self.__status = Label(parent, text="Status: initial", anchor=W)
	self.__status.pack(side=TOP, fill=X)
	self.__checking = Label(parent, text="Checking: none", anchor=W)
	self.__checking.pack(side=TOP, fill=X)
	self.__mp = mp = MultiPanel(parent)
	sys.stdout = self.__log = LogPanel(mp, "Log")
	self.__todo = ListPanel(mp, "To check", self.showinfo)
	self.__ext = ListPanel(mp, "Off site", self.showinfo)
	self.__done = ListPanel(mp, "Checked", self.showinfo)
	self.__bad = ListPanel(mp, "Bad links", self.showinfo)
	self.__details = LogPanel(mp, "Details")
	self.__extodo = []
	webchecker.Checker.__init__(self)
	if root:
	    root = string.strip(str(root))
	    if root:
		self.suggestroot(root)

    def suggestroot(self, root):
	self.__rootentry.delete(0, END)
	self.__rootentry.insert(END, root)
	self.__rootentry.select_range(0, END)

    def enterroot(self, event=None):
	root = self.__rootentry.get()
	root = string.strip(root)
	if root:
	    self.addroot(root)
	    try:
		i = self.__todo.items.index(root)
	    except (ValueError, IndexError):
		pass
	    else:
		self.__todo.list.select_clear(0, END)
		self.__todo.list.select_set(i)
		self.__todo.list.yview(i)
	self.__rootentry.delete(0, END)

    def start(self):
	self.__start.config(state=DISABLED, relief=SUNKEN)
	self.__stop.config(state=NORMAL)
	self.__step.config(state=DISABLED)
	self.enterroot()
	self.__running = 1
	self.go()

    def stop(self):
	self.__stop.config(state=DISABLED)
	self.__running = 0

    def step(self):
	self.__start.config(state=DISABLED)
	self.__step.config(state=DISABLED, relief=SUNKEN)
	self.enterroot()
	self.__running = 0
	self.dosomething()

    def go(self):
	if self.__running:
	    self.__parent.after_idle(self.dosomething)
	else:
	    self.__checking.config(text="Checking: none")
	    self.__start.config(state=NORMAL, relief=RAISED)
	    self.__step.config(state=NORMAL, relief=RAISED)

    __busy = 0

    def dosomething(self):
	if self.__busy: return
	self.__busy = 1
	if self.todo:
	    l = self.__todo.selectedindices()
	    if l:
		i = l[0]
	    else:
	        i = 0
		self.__todo.list.select_set(i)
	    self.__todo.list.yview(i)
	    url = self.__todo.items[i]
	    self.__checking.config(text="Checking: "+url)
	    self.__parent.update()
	    self.dopage(url)
	elif self.__extodo:
	    # XXX Should have an indication of these in the todo window...
	    ##i = random.randint(0, len(self.__extodo)-1)
	    i = 0
	    url = self.__extodo[i]
	    del self.__extodo[i]
	    self.__checking.config(text="Checking: "+url)
	    self.__parent.update()
	    self.checkextpage(url)
	else:
	    self.stop()
	self.__busy = 0
	self.go()

    def showinfo(self, url):
	d = self.__details
	d.clear()
	d.write("URL:    %s\n" % url)
	if self.bad.has_key(url):
	    d.write("Error:  %s\n" % str(self.bad[url]))
	if url in self.roots:
	    d.write("Note:   This is a root URL\n")
	if self.done.has_key(url):
	    d.write("Status: checked\n")
	    o = self.done[url]
	elif self.todo.has_key(url):
	    d.write("Status: to check\n")
	    o = self.todo[url]
	elif self.ext.has_key(url):
	    d.write("Status: off site\n")
	    o = self.ext[url]
	else:
	    d.write("Status: unknown (!)\n")
	    o = []
	self.__mp.showpanel("Details")
	for source, rawlink in o:
	    d.write("Origin: %s" % source)
	    if rawlink != url:
		d.write(" (%s)" % rawlink)
	    d.write("\n")

    def newstatus(self):
	self.__status.config(text="Status: "+self.status()[1:-1])
	self.__parent.update()

    def setbad(self, url, msg):
	webchecker.Checker.setbad(self, url, msg)
	self.__bad.insert(url)
	self.newstatus()

    def setgood(self, url):
	webchecker.Checker.setgood(self, url)
	self.__bad.remove(url)
	self.newstatus()

    def newextlink(self, url, origin):
	webchecker.Checker.newextlink(self, url, origin)
	self.__extodo.append(url)
	self.__ext.insert(url)
	self.newstatus()

    def newintlink(self, url, origin):
	webchecker.Checker.newintlink(self, url, origin)
	if self.done.has_key(url):
	    self.__done.insert(url)
	elif self.todo.has_key(url):
	    self.__todo.insert(url)
	self.newstatus()

    def markdone(self, url):
	webchecker.Checker.markdone(self, url)
	self.__done.insert(url)
	self.__todo.remove(url)
	self.newstatus()


class ListPanel:

    def __init__(self, mp, name, showinfo=None):
	self.mp = mp
	self.name = name
	self.showinfo = showinfo
	self.panel = mp.addpanel(name)
	self.list, self.frame = tktools.make_list_box(
	    self.panel, width=60, height=5)
	self.list.config(exportselection=0)
	if showinfo:
	    self.list.bind('<Double-Button-1>', self.doubleclick)
	self.items = []

    def doubleclick(self, event):
	l = self.selectedindices()
	if l:
	    self.showinfo(self.list.get(l[0]))

    def selectedindices(self):
    	l = self.list.curselection()
    	if not l: return []
    	return map(string.atoi, l)

    def insert(self, url):
	if url not in self.items:
	    if not self.items:
		self.mp.showpanel(self.name)
	    # (I tried sorting alphabetically, but the display is too jumpy)
	    i = len(self.items)
	    self.list.insert(i, url)
##	    self.list.yview(i)
	    self.items.insert(i, url)

    def remove(self, url):
	try:
	    i = self.items.index(url)
	except (ValueError, IndexError):
	    pass
	else:
	    was_selected = i in self.selectedindices()
	    self.list.delete(i)
	    del self.items[i]
	    if not self.items:
		self.mp.hidepanel(self.name)
	    elif was_selected:
		if i >= len(self.items):
		    i = len(self.items) - 1
		self.list.select_set(i)


class LogPanel:

    def __init__(self, mp, name):
	self.mp = mp
	self.name = name
	self.panel = mp.addpanel(name)
	self.text, self.frame = tktools.make_text_box(self.panel, height=10)
	self.text.config(wrap=NONE)

    def clear(self):
	self.text.delete("1.0", END)
	self.text.yview("1.0")

    def write(self, s):
	self.text.insert(END, s)
	if '\n' in s:
	    self.text.yview(END)
	    self.panel.update()


class MultiPanel:

    def __init__(self, parent):
	self.parent = parent
	self.frame = Frame(self.parent)
	self.frame.pack(expand=1, fill=BOTH)
	self.topframe = Frame(self.frame, borderwidth=2, relief=RAISED)
	self.topframe.pack(fill=X)
	self.botframe = Frame(self.frame)
	self.botframe.pack(expand=1, fill=BOTH)
	self.panelnames = []
	self.panels = {}

    def addpanel(self, name, on=0):
	v = StringVar()
	if on:
	    v.set(name)
	else:
	    v.set("")
	check = Checkbutton(self.topframe, text=name,
			    offvalue="", onvalue=name, variable=v,
			    command=self.checkpanel)
	check.pack(side=LEFT)
	panel = Frame(self.botframe)
	label = Label(panel, text=name, borderwidth=2, relief=RAISED, anchor=W)
	label.pack(side=TOP, fill=X)
	t = v, check, panel
	self.panelnames.append(name)
	self.panels[name] = t
	if on:
	    panel.pack(expand=1, fill=BOTH)
	return panel

    def showpanel(self, name):
	v, check, panel = self.panels[name]
	v.set(name)
	panel.pack(expand=1, fill=BOTH)

    def hidepanel(self, name):
	v, check, panel = self.panels[name]
	v.set("")
	panel.pack_forget()

    def checkpanel(self):
	for name in self.panelnames:
	    v, check, panel = self.panels[name]
	    panel.pack_forget()
	for name in self.panelnames:
	    v, check, panel = self.panels[name]
	    if v.get():
		panel.pack(expand=1, fill=BOTH)


if __name__ == '__main__':
    main()