2002-02-19 Robert Collins <rbtcollins@hotmail.com>

[cygwin-apps/setup.git] / package_meta.h

/*
 * Copyright (c) 2001, Robert Collins.
 *
 *     This program is free software; you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation; either version 2 of the License, or
 *     (at your option) any later version.
 *
 *     A copy of the GNU General Public License can be found at
 *     http://www.gnu.org/
 *
 * Written by Robert Collins  <rbtcollins@hotmail.com>
 *
 */

#ifndef _PACKAGE_META_H_
#define _PACKAGE_META_H_

/* Used for selecting a given 'trust' level */
typedef enum
{
  TRUST_UNKNOWN,
  TRUST_PREV,
  TRUST_CURR,
  TRUST_TEST,
  NTRUST
}
trusts;

class packageversion;
class packagemeta;
class category;

/* Required to parse this completely */
#include "list.h"
#include "String++.h"
#include "category.h"

/* 
   For cleanliness this may need to be put in its own file later. */
class CategoryPackage
{
public:
  CategoryPackage (Category & cat):key (cat), pkg (0)
  {
    next = cat.packages;
    cat.packages = this;
  };
  Category & key;
  CategoryPackage *next;	/* The next package pointer in the list */
  packagemeta *pkg;
};


/* NOTE: A packagemeta without 1 packageversion is invalid! */
class packagemeta
{
public:
  packagemeta (String const &pkgname):name (pkgname), key(pkgname), installed_from (0),
    //versions (0),
//    versioncount (0), versionspace (0), 
  installed (0), prev (0), prevtimestamp (0), curr (0), currtimestamp (0),
    exp (0), exptimestamp (0), desired (0)
  {
  }

  packagemeta (String const &pkgname,
	       String const &installedfrom):name (pkgname), key(pkgname),
	       installed_from (installedfrom),
    //versions (0),    versioncount (0), versionspace (0), 
   
    installed (0), prev (0), prevtimestamp (0), curr (0), currtimestamp (0),
    exp (0), exptimestamp (0), desired (0)
  {
  };

  ~packagemeta ()
  {
  };

  void add_version (packageversion &);
  void set_installed (packageversion &);

  class _actions
  {
  public:
    _actions ():_value (0) {};
    _actions (int aInt) {
    _value = aInt;
    if (_value < 0 ||  _value > 3)
      _value = 0;
    }
    _actions & operator ++ ();
    bool operator == (_actions const &rhs) { return _value == rhs._value; }
    bool operator != (_actions const &rhs) { return _value != rhs._value; }
    const char *caption ();
  private:
    int _value;
  };
  static const _actions Default_action;
  static const _actions Install_action;
  static const _actions Reinstall_action;
  static const _actions Uninstall_action;
  void set_action (packageversion *default_version);
  void set_action (_actions, packageversion * default_version);
  void uninstall ();
  int set_requirements (trusts deftrust = TRUST_CURR, size_t depth = 0);

  String action_caption ();
  packageversion * trustp (trusts const t) const
  {
    return t == TRUST_PREV ? (prev ? prev : (curr ? curr : installed))
         : t == TRUST_CURR ? (curr ? curr : installed)
	 : exp;
  }

  String name;			/* package name, like "cygwin" */
  String key;
  /* legacy variable used to output data for installed.db versions <= 2 */
  String installed_from;
  /* SDesc is global in theory, across all package versions. 
     LDesc is not: it can be different per version */
  String const SDesc () const;
  /* what categories does this package belong in. Note that if multiple versions
   * of a package disagree.... the first one read in will take precedence.
   */
  void add_category (Category &);
  list < CategoryPackage, Category &, Categorycmp > Categories;

  list < packageversion, String, String::casecompare > versions;
  /* which one is installed. */
  packageversion *installed;
  /* which one is listed as "prev" in our available packages db */
  packageversion *prev;
  /* And what was the timestamp of the ini it was found from */
  unsigned int prevtimestamp;
  /* ditto for current - stable */
  packageversion *curr;
  unsigned int currtimestamp;
  /* and finally the experimental version */
  packageversion *exp;
  unsigned int exptimestamp;
  /* Now for the user stuff :] */
  /* What version does the user want ? */
  packageversion *desired;

protected:
  packagemeta (packagemeta const &);
  packagemeta &operator= (packagemeta const &);
};

#endif /* _PACKAGE_META_H_ */