Added basic profile handling.

[automanga.git] / manga / profile.py

import os
pj = os.path.join

home = os.getenv("HOME")
if home is None or not os.path.isdir(home):
    raise Exception("Could not find home directory for profile keeping")
basedir = pj(home, ".manga", "profiles")

def openwdir(nm, mode="r"):
    if os.path.exists(nm):
        return open(nm, mode)
    if mode != "r":
        d = os.path.dirname(nm)
        if not os.path.isdir(d):
            os.makedirs(d)
    return open(nm, mode)

def splitline(line):
    def bsq(c):
        if c == "\\": return "\\"
        elif c == '"': return '"'
        elif c == " ": return " "
        elif c == "n": return "\n"
        else: return ""
    ret = []
    p = 0
    buf = ""
    a = False
    while p < len(line):
        c = line[p]
        if c.isspace():
            p += 1
        else:
            while p < len(line):
                c = line[p]
                p += 1
                if c == '"':
                    a = True
                    while p < len(line):
                        c = line[p]
                        p += 1
                        if c == '"':
                            break
                        elif c == "\\" and p < len(line):
                            buf += bsq(line[p])
                            p += 1
                        else:
                            buf += c
                elif c.isspace():
                    ret.append(buf)
                    buf = ""
                    break
                elif c == "\\" and p < len(line):
                    buf += bsq(line[p])
                    p += 1
                else:
                    buf += c
    if a or buf != "":
        ret.append(buf)
    return ret

def consline(*words):
    buf = ""
    for w in words:
        if any((c == "\\" or c == '"' or c == "\n" for c in w)):
            wb = ""
            for c in w:
                if c == "\\": wb += "\\\\"
                elif c == '"': wb += '\\"'
                elif c == "\n": wb += "\\n"
                else: wb += c
            w = wb
        if w == "" or any((c.isspace() for c in w)):
            w = '"' + w + '"'
        if buf != "":
            buf += " "
        buf += w
    return buf

class manga(object):
    def __init__(self, profile, libnm, id, path):
        self.profile = profile
        self.libnm = libnm
        self.id = id
        self.path = path
        self.props = self.loadprops()

    def loadprops(self):
        ret = {}
        with openwdir(self.path) as f:
            for line in f:
                words = splitline(line)
                if len(words) < 1: continue
                if words[0] == "set" and len(words) > 2:
                    ret[words[1]] = words[2]
                elif words[0] == "lset" and len(words) > 1:
                    ret[words[1]] = words[2:]
        return ret

    def prop(self, key, default=KeyError):
        if key not in self.props:
            if default is KeyError:
                raise KeyError(key)
            return default
        return self.props[key]

    def setprop(self, key, val):
        self.props[key] = val

    def saveprops(self):
        with openwdir(self.path, "w") as f:
            for key, val in self.props.iteritems():
                if isinstance(val, str):
                    f.write(consline("set", key, val) + "\n")
                else:
                    f.write(consline("lset", key, *val) + "\n")

    def open(self):
        import lib
        return lib.findlib(self.libnm).byid(self.id)

class profile(object):
    def __init__(self, dir):
        self.dir = dir
        self.name = None

    def getmapping(self):
        seq = 0
        ret = {}
        if os.path.exists(pj(self.dir, "map")):
            with openwdir(pj(self.dir, "map")) as f:
                for ln in f:
                    words = splitline(ln)
                    if len(words) < 1:
                        continue
                    if words[0] == "seq" and len(words) > 1:
                        try:
                            seq = int(words[1])
                        except ValueError:
                            pass
                    elif words[0] == "manga" and len(words) > 3:
                        try:
                            ret[words[1], words[2]] = int(words[3])
                        except ValueError:
                            pass
        return seq, ret

    def savemapping(self, seq, m):
        with openwdir(pj(self.dir, "map"), "w") as f:
            f.write(consline("seq", str(seq)) + "\n")
            for (libnm, id), num in m.iteritems():
                f.write(consline("manga", libnm, id, str(num)) + "\n")

    def getmanga(self, libnm, id, creat=False):
        seq, m = self.getmapping()
        if (libnm, id) in m:
            return manga(self, libnm, id, pj(self.dir, "%i.manga" % m[(libnm, id)]))
        if not creat:
            raise KeyError("no such manga: (%s, %s)" % (libnm, id))
        while True:
            try:
                fp = openwdir(pj(self.dir, "%i.manga" % seq), "wx")
            except IOError:
                seq += 1
            else:
                break
        fp.close()
        m[(libnm, id)] = seq
        self.savemapping(seq, m)
        return manga(self, libnm, id, pj(self.dir, "%i.manga" % seq))

    def setlast(self):
        if self.name is None:
            raise ValueError("profile at " + self.dir + " has no name")
        with openwdir(pj(basedir, "last"), "w") as f:
            f.write(self.name + "\n")

    @classmethod
    def byname(cls, name):
        if not name or name == "last" or name[0] == '.':
            raise KeyError("invalid profile name: " + name)
        ret = cls(pj(basedir, name))
        ret.name = name
        return ret

    @classmethod
    def last(cls):
        if not os.path.exists(pj(basedir, "last")):
            raise KeyError("there is no last used profile")
        with open(pj(basedir, "last")) as f:
            return cls.byname(f.readline().strip())