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path: root/mail/mail-vfolder.c
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/*
  Copyright 2000, 2001 Ximian Inc.

  Author: Michael Zucchi <notzed@ximian.com>

  code for managing vfolders

  NOTE: dont run this through fucking indent.
*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <glib.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <libgnomeui/gnome-dialog.h>
#include <libgnomeui/gnome-dialog-util.h>
#include <libgnomeui/gnome-stock.h>

#include "Evolution.h"
#include "evolution-storage.h"

#include "evolution-shell-component.h"
#include "folder-browser.h"
#include "mail-vfolder.h"
#include "mail-tools.h"
#include "mail-autofilter.h"
#include "mail-folder-cache.h"
#include "mail.h"
#include "mail-ops.h"
#include "mail-mt.h"

#include "camel/camel.h"
#include "camel/camel-remote-store.h"
#include "camel/camel-vee-folder.h"
#include "camel/camel-vee-store.h"

#include "filter/vfolder-context.h"
#include "filter/vfolder-editor.h"

#include "e-util/e-unicode-i18n.h"

#define d(x) x

static VfolderContext *context; /* context remains open all time */
static CamelStore *vfolder_store; /* the 1 static vfolder store */

/* lock for accessing shared resources (below) */
static pthread_mutex_t vfolder_lock = PTHREAD_MUTEX_INITIALIZER;

static GList *source_folders_remote;    /* list of source folder uri's - remote ones */
static GList *source_folders_local; /* list of source folder uri's - local ones */
static GHashTable *vfolder_hash;

extern EvolutionShellClient *global_shell_client;

/* more globals ... */
extern char *evolution_dir;
extern CamelSession *session;

static void rule_changed(FilterRule *rule, CamelFolder *folder);

#define LOCK() pthread_mutex_lock(&vfolder_lock);
#define UNLOCK() pthread_mutex_unlock(&vfolder_lock);

/* ********************************************************************** */

struct _setup_msg {
    struct _mail_msg msg;

    CamelFolder *folder;
    char *query;
    GList *sources_uri;
    GList *sources_folder;
};

static char *
vfolder_setup_desc(struct _mail_msg *mm, int done)
{
    struct _setup_msg *m = (struct _setup_msg *)mm;

    return g_strdup_printf(_("Setting up vfolder: %s"), m->folder->full_name);
}

static void
vfolder_setup_do(struct _mail_msg *mm)
{
    struct _setup_msg *m = (struct _setup_msg *)mm;
    GList *l, *list = NULL;
    CamelFolder *folder;

    d(printf("Setting up vfolder: %s\n", m->folder->full_name));

    camel_vee_folder_set_expression((CamelVeeFolder *)m->folder, m->query);

    l = m->sources_uri;
    while (l) {
        (printf(" Adding uri: %s\n", (char *)l->data));
        folder = mail_tool_uri_to_folder(l->data, &mm->ex);
        if (folder) {
            list = g_list_append(list, folder);
        } else {
            g_warning("Could not open vfolder source: %s", (char *)l->data);
            camel_exception_clear(&mm->ex);
        }
        l = l->next;
    }

    l = m->sources_folder;
    while (l) {
        d(printf(" Adding folder: %s\n", ((CamelFolder *)l->data)->full_name));
        camel_object_ref((CamelObject *)l->data);
        list = g_list_append(list, l->data);
        l = l->next;
    }

    camel_vee_folder_set_folders((CamelVeeFolder *)m->folder, list);

    l = list;
    while (l) {
        camel_object_unref((CamelObject *)l->data);
        l = l->next;
    }
    g_list_free(list);
}

static void
vfolder_setup_done(struct _mail_msg *mm)
{
    struct _setup_msg *m = (struct _setup_msg *)mm;

    m = m;
}

static void
vfolder_setup_free (struct _mail_msg *mm)
{
    struct _setup_msg *m = (struct _setup_msg *)mm;
    GList *l;

    camel_object_unref((CamelObject *)m->folder);
    g_free(m->query);

    l = m->sources_uri;
    while (l) {
        g_free(l->data);
        l = l->next;
    }
    g_list_free(m->sources_uri);

    l = m->sources_folder;
    while (l) {
        camel_object_unref(l->data);
        l = l->next;
    }
    g_list_free(m->sources_folder);
}

static struct _mail_msg_op vfolder_setup_op = {
    vfolder_setup_desc,
    vfolder_setup_do,
    vfolder_setup_done,
    vfolder_setup_free,
};

static int
vfolder_setup(CamelFolder *folder, const char *query, GList *sources_uri, GList *sources_folder)
{
    struct _setup_msg *m;
    int id;
    
    m = mail_msg_new(&vfolder_setup_op, NULL, sizeof (*m));
    m->folder = folder;
    camel_object_ref((CamelObject *)folder);
    m->query = g_strdup(query);
    m->sources_uri = sources_uri;
    m->sources_folder = sources_folder;
    
    id = m->msg.seq;
    e_thread_put(mail_thread_queued_slow, (EMsg *)m);

    return id;
}

/* ********************************************************************** */

struct _adduri_msg {
    struct _mail_msg msg;

    char *uri;
    GList *folders;
};

static char *
vfolder_adduri_desc(struct _mail_msg *mm, int done)
{
    struct _adduri_msg *m = (struct _adduri_msg *)mm;

    return g_strdup_printf(_("Updating vfolders for uri: %s"), m->uri);
}

static void
vfolder_adduri_do(struct _mail_msg *mm)
{
    struct _adduri_msg *m = (struct _adduri_msg *)mm;
    GList *l;
    CamelFolder *folder;
    extern CamelFolder *drafts_folder, *outbox_folder, *sent_folder;

    d(printf("Adding uri to vfolder: %s\n", m->uri));

    if (!mail_note_get_folder_from_uri(m->uri, &folder)) {
        g_warning("Folder '%s' disappeared while I was adding it to my vfolder", m->uri);
        return;
    }

    if (folder == NULL)
        folder = mail_tool_uri_to_folder(m->uri, &mm->ex);

    if (folder != NULL) {
        if (folder != drafts_folder && folder != outbox_folder && folder != sent_folder) {
            l = m->folders;
            while (l) {
                camel_vee_folder_add_folder((CamelVeeFolder *)l->data, folder);
                l = l->next;
            }
        }
        camel_object_unref((CamelObject *)folder);
    }
}

static void
vfolder_adduri_done(struct _mail_msg *mm)
{
    struct _adduri_msg *m = (struct _adduri_msg *)mm;

    m = m;
}

static void
vfolder_adduri_free (struct _mail_msg *mm)
{
    struct _adduri_msg *m = (struct _adduri_msg *)mm;

    g_list_foreach(m->folders, (GFunc)camel_object_unref, NULL);
    g_list_free(m->folders);
    g_free(m->uri);
}

static struct _mail_msg_op vfolder_adduri_op = {
    vfolder_adduri_desc,
    vfolder_adduri_do,
    vfolder_adduri_done,
    vfolder_adduri_free,
};

static int
vfolder_adduri(const char *uri, GList *folders)
{
    struct _adduri_msg *m;
    int id;
    
    m = mail_msg_new(&vfolder_adduri_op, NULL, sizeof (*m));
    m->folders = folders;
    m->uri = g_strdup(uri);
    
    id = m->msg.seq;
    e_thread_put(mail_thread_queued_slow, (EMsg *)m);

    return id;
}

/* ********************************************************************** */

/* So, uh, apparently g_list_find_custom expect the compare func to return 0 to mean true? */
static GList *
my_list_find(GList *l, const char *uri, GCompareFunc cmp)
{
    while (l) {
        if (cmp(l->data, uri))
            break;
        l = l->next;
    }
    return l;
}

/* called when a new uri becomes available */
void
mail_vfolder_add_uri(CamelStore *store, const char *uri)
{
    FilterRule *rule;
    const char *source;
    CamelVeeFolder *vf;
    GList *folders = NULL;
    int remote = (((CamelService *)store)->provider->flags & CAMEL_PROVIDER_IS_REMOTE) != 0;
    GCompareFunc uri_cmp = CAMEL_STORE_CLASS(CAMEL_OBJECT_GET_CLASS(store))->compare_folder_name;

    if (CAMEL_IS_VEE_STORE(store) || !strncmp(uri, "vtrash:", 7))
        return;

    LOCK();

    printf("Adding uri to check: %s\n", uri);

    /* maintain the source folders lists for changed rules later on */
    if (remote) {
        if (my_list_find(source_folders_remote, (void *)uri, uri_cmp) == NULL)
            source_folders_remote = g_list_prepend(source_folders_remote, g_strdup(uri));
    } else {
        if (my_list_find(source_folders_local, (void *)uri, uri_cmp) == NULL)
            source_folders_local = g_list_prepend(source_folders_local, g_strdup(uri));
    }

    rule = NULL;
    while ( (rule = rule_context_next_rule((RuleContext *)context, rule, NULL)) ) {
        int found = FALSE;

        if (rule->source
            && ((!strcmp(rule->source, "local") && !remote)
            || (!strcmp(rule->source, "remote_active") && remote)
            || (!strcmp(rule->source, "local_remote_active"))))
            found = TRUE;

        /* we check using the store uri_cmp since its more accurate */
        source = NULL;
        while ( !found && (source = vfolder_rule_next_source((VfolderRule *)rule, source)) )
            found = uri_cmp(uri, source);
        
        if (found) {
            vf = g_hash_table_lookup(vfolder_hash, rule->name);
            g_assert(vf);
            camel_object_ref((CamelObject *)vf);
            folders = g_list_prepend(folders, vf);
        }
    }
    
    UNLOCK();
    
    if (folders != NULL)
        vfolder_adduri(uri, folders);
}

/* called when a uri is removed from a store */
void
mail_vfolder_remove_uri(CamelStore *store, const char *uri)
{
    int remote = (((CamelService *)store)->provider->flags & CAMEL_PROVIDER_IS_REMOTE) != 0;
    GCompareFunc uri_cmp = CAMEL_STORE_CLASS(CAMEL_OBJECT_GET_CLASS(store))->compare_folder_name;
    GList *link;
    FilterRule *rule;
    const char *source;
    CamelVeeFolder *vf;
    GString *changed;

    if (CAMEL_IS_VEE_STORE(store) || !strncmp(uri, "vtrash:", 7))
        return;

    printf("Removing uri to check: %s\n", uri);

    g_assert(pthread_self() == mail_gui_thread);

    changed = g_string_new("");

    LOCK();

    /* maintain remote/local lists */
    if (remote) {
        if ((link = my_list_find(source_folders_remote, (void *)uri, uri_cmp)) == NULL) {
            g_free(link->data);
            source_folders_remote = g_list_remove_link(source_folders_remote, link);
        }
    } else {
        if ((link = my_list_find(source_folders_local, (void *)uri, uri_cmp)) == NULL) {
            g_free(link->data);
            source_folders_local = g_list_remove_link(source_folders_local, link);
        }
    }

    printf("vfolder remove uri: %s\n", uri);

    /* check to see if a rule needs updating, if it does, make out it changed which will re-build it */
    rule = NULL;
    while ( (rule = rule_context_next_rule((RuleContext *)context, rule, NULL)) ) {
        int found = FALSE;

        source = NULL;
        while ( !found && (source = vfolder_rule_next_source((VfolderRule *)rule, source)) )
            found = uri_cmp(uri, source);

        if (found
            || (rule->source
            && ((!strcmp(rule->source, "local") && !remote)
                || (!strcmp(rule->source, "remote_active") && remote)
                || (!strcmp(rule->source, "local_remote_active"))))) {

            vf = g_hash_table_lookup(vfolder_hash, rule->name);
            g_assert(vf);
            if (source) {
                vfolder_rule_remove_source((VfolderRule *)rule, source);
                g_string_sprintfa(changed, "    %s\n", rule->name);
            } else
                rule_changed(rule, (CamelFolder *)vf);
        }
    }

    UNLOCK();

    if (changed->str[0]) {
        GnomeDialog *gd;
        char *text, *user;

        text = g_strdup_printf(_("The following vFolder(s):\n%s"
                     "Used the removed folder:\n    '%s'\n"
                     "And have been updated."),
                       changed->str, uri);

        gd = (GnomeDialog *)gnome_warning_dialog(text);
        g_free(text);
        gnome_dialog_set_close(gd, TRUE);
        gtk_widget_show((GtkWidget *)gd);

        user = g_strdup_printf("%s/vfolders.xml", evolution_dir);
        rule_context_save((RuleContext *)context, user);
        g_free(user);
    }

    g_string_free(changed, TRUE);
}

/* called when a uri is renamed in a store */
#if 0
void
mail_vfolder_rename_uri(CamelStore *store, const char *from, const char *to)
{
    printf("vfolder rename uri: %s to %s\n", from, to);
}
#endif

/* ********************************************************************** */

static void context_rule_added(RuleContext *ctx, FilterRule *rule);

static void
rule_changed(FilterRule *rule, CamelFolder *folder)
{
    const char *sourceuri;
    GList *l;
    GList *sources_uri = NULL, *sources_folder = NULL;
    GString *query;
    int i;
    CamelFolder *newfolder;

    /* if the folder has changed name, then add it, then remove the old manually */
    if (strcmp(folder->full_name, rule->name) != 0) {
        char *path, *key;
        CamelFolder *old;

        gtk_signal_disconnect_by_func((GtkObject *)rule, rule_changed, folder);

        context_rule_added((RuleContext *)context, rule);

        /* TODO: remove folder from folder info cache? */

        path = g_strdup_printf("/%s", folder->full_name);
        evolution_storage_removed_folder(mail_lookup_storage(vfolder_store), path);
        g_free(path);

        LOCK();
        if (g_hash_table_lookup_extended(vfolder_hash, folder->full_name, (void **)&key, (void **)&old)) {
            g_hash_table_remove(vfolder_hash, key);
            g_free(key);
            UNLOCK();
            camel_object_unref((CamelObject *)folder);
        } else {
            UNLOCK();
            g_warning("couldn't find a vfolder rule in our table? %s", folder->full_name);
        }

        return;
    }

    d(printf("Filter rule changed? for folder '%s'!!\n", folder->name));

    /* find any (currently available) folders, and add them to the ones to open */
    sourceuri = NULL;
    while ( (sourceuri = vfolder_rule_next_source((VfolderRule *)rule, sourceuri)) ) {
        if (mail_note_get_folder_from_uri(sourceuri, &newfolder)) {
            if (newfolder)
                sources_folder = g_list_append(sources_folder, newfolder);
            else
                sources_uri = g_list_append(sources_uri, g_strdup(sourceuri));
        }
    }

    /* check the remote/local uri lists for any other uri's that should be looked at */
    if (rule->source) {
        LOCK();
        for (i=0;i<2;i++) {
            if (i==0 && (!strcmp(rule->source, "local") || !strcmp(rule->source, "local_remote_active")))
                l = source_folders_local;
            else if (i==1 && (!strcmp(rule->source, "remote_active") || !strcmp(rule->source, "local_remote_active")))
                l = source_folders_remote;
            else
                l = NULL;

            while (l) {
                if (mail_note_get_folder_from_uri(l->data, &newfolder)) {
                    if (newfolder)
                        sources_folder = g_list_append(sources_folder, newfolder);
                    else
                        sources_uri = g_list_append(sources_uri, g_strdup(sourceuri));
                } else {
                    printf("  -> No such folder?\n");
                }
                l = l->next;
            }
        }
        UNLOCK();
    }

    query = g_string_new("");
    filter_rule_build_code(rule, query);

    vfolder_setup(folder, query->str, sources_uri, sources_folder);

    g_string_free(query, TRUE);
}

static void context_rule_added(RuleContext *ctx, FilterRule *rule)
{
    CamelFolder *folder;

    d(printf("rule added: %s\n", rule->name));

    /* this always runs quickly */
    folder = camel_store_get_folder(vfolder_store, rule->name, 0, NULL);
    if (folder) {
        gtk_signal_connect((GtkObject *)rule, "changed", rule_changed, folder);

        LOCK();
        g_hash_table_insert(vfolder_hash, g_strdup(rule->name), folder);
        UNLOCK();

        mail_note_folder(folder);
        rule_changed(rule, folder);
    }
}

static void context_rule_removed(RuleContext *ctx, FilterRule *rule)
{
    char *key, *path;
    CamelFolder *folder;

    d(printf("rule removed; %s\n", rule->name));

    /* TODO: remove from folder info cache? */

    path = g_strdup_printf("/%s", rule->name);
    evolution_storage_removed_folder(mail_lookup_storage(vfolder_store), path);
    g_free(path);

    LOCK();
    if (g_hash_table_lookup_extended(vfolder_hash, rule->name, (void **)&key, (void **)&folder)) {
        g_hash_table_remove(vfolder_hash, key);
        g_free(key);
        UNLOCK();
        camel_object_unref((CamelObject *)folder);
    } else
        UNLOCK();

    camel_store_delete_folder(vfolder_store, rule->name, NULL);
}

static void
store_folder_created(CamelObject *o, void *event_data, void *data)
{
    CamelStore *store = (CamelStore *)o;
    CamelFolderInfo *info = event_data;

    store = store;
    info = info;
}

static void
store_folder_deleted(CamelObject *o, void *event_data, void *data)
{
    CamelStore *store = (CamelStore *)o;
    CamelFolderInfo *info = event_data;
    FilterRule *rule;
    char *user;

    d(printf("Folder deleted: %s\n", info->name));
    store = store;

    /* delete it from our list */
    rule = rule_context_find_rule((RuleContext *)context, info->name, NULL);
    if (rule) {
        /* We need to stop listening to removed events, otherwise we'll try and remove it again */
        gtk_signal_disconnect_by_func((GtkObject *)context, context_rule_removed, context);
        rule_context_remove_rule((RuleContext *)context, rule);
        gtk_object_unref((GtkObject *)rule);
        gtk_signal_connect((GtkObject *)context, "rule_removed", context_rule_removed, context);

        user = g_strdup_printf("%s/vfolders.xml", evolution_dir);
        rule_context_save((RuleContext *)context, user);
        g_free(user);
    } else {
        g_warning("Cannot find rule for deleted vfolder '%s'", info->name);
    }
}

void
vfolder_load_storage(GNOME_Evolution_Shell shell)
{
    char *user, *storeuri;
    FilterRule *rule;

    vfolder_hash = g_hash_table_new(g_str_hash, g_str_equal);

    /* first, create the vfolder store, and set it up */
    storeuri = g_strdup_printf("vfolder:%s/vfolder", evolution_dir);
    vfolder_store = camel_session_get_store(session, storeuri, NULL);
    if (vfolder_store == NULL) {
        g_warning("Cannot open vfolder store - no vfolders available");
        return;
    }

    camel_object_hook_event((CamelObject *)vfolder_store, "folder_created",
                (CamelObjectEventHookFunc)store_folder_created, NULL);
    camel_object_hook_event((CamelObject *)vfolder_store, "folder_deleted",
                (CamelObjectEventHookFunc)store_folder_deleted, NULL);

    d(printf("got store '%s' = %p\n", storeuri, vfolder_store));
    mail_load_storage_by_uri(shell, storeuri, U_("VFolders"));

    /* load our rules */
    user = g_strdup_printf ("%s/vfolders.xml", evolution_dir);
    context = vfolder_context_new ();
    if (rule_context_load ((RuleContext *)context, EVOLUTION_DATADIR "/evolution/vfoldertypes.xml", user) != 0) {
        g_warning("cannot load vfolders: %s\n", ((RuleContext *)context)->error);
    }
    g_free (user);
    
    gtk_signal_connect((GtkObject *)context, "rule_added", context_rule_added, context);
    gtk_signal_connect((GtkObject *)context, "rule_removed", context_rule_removed, context);

    /* and setup the rules we have */
    rule = NULL;
    while ( (rule = rule_context_next_rule((RuleContext *)context, rule, NULL)) ) {
        context_rule_added((RuleContext *)context, rule);
    }

    g_free(storeuri);
}

static GtkWidget *vfolder_editor = NULL;

static void
vfolder_editor_destroy (GtkWidget *widget, gpointer user_data)
{
    vfolder_editor = NULL;
}

static void
vfolder_editor_clicked (GtkWidget *dialog, int button, void *data)
{
    if (button == 0) {
        char *user;

        user = g_strdup_printf ("%s/vfolders.xml", evolution_dir);
        rule_context_save ((RuleContext *)context, user);
        g_free (user);
    }
    if (button != -1) {
        gnome_dialog_close (GNOME_DIALOG (dialog));
    }
}

void
vfolder_edit (void)
{
    if (vfolder_editor) {
        gdk_window_raise (GTK_WIDGET (vfolder_editor)->window);
        return;
    }
    
    vfolder_editor = GTK_WIDGET (vfolder_editor_new (context));
    gtk_signal_connect (GTK_OBJECT (vfolder_editor), "clicked", vfolder_editor_clicked, NULL);
    gtk_signal_connect (GTK_OBJECT (vfolder_editor), "destroy", vfolder_editor_destroy, NULL);
    gtk_widget_show (vfolder_editor);
}

static void
new_rule_clicked(GtkWidget *w, int button, void *data)
{
    if (button == 0) {
        char *user;
        FilterRule *rule = gtk_object_get_data((GtkObject *)w, "rule");

        gtk_object_ref((GtkObject *)rule);
        rule_context_add_rule((RuleContext *)context, rule);
        user = g_strdup_printf("%s/vfolders.xml", evolution_dir);
        rule_context_save((RuleContext *)context, user);
        g_free(user);
    }
    if (button != -1) {
        gnome_dialog_close((GnomeDialog *)w);
    }
}

FilterPart *
vfolder_create_part(const char *name)
{
    return rule_context_create_part((RuleContext *)context, name);
}

/* clones a filter/search rule into a matching vfolder rule (assuming the same system definitions) */
FilterRule *
vfolder_clone_rule(FilterRule *in)
{
    FilterRule *rule = (FilterRule *)vfolder_rule_new();
    xmlNodePtr xml;

    xml = filter_rule_xml_encode(in);
    filter_rule_xml_decode(rule, xml, (RuleContext *)context);
    xmlFreeNodeList(xml);

    return rule;
}

/* adds a rule with a gui */
void
vfolder_gui_add_rule(VfolderRule *rule)
{
    GtkWidget *w;
    GnomeDialog *gd;

    w = filter_rule_get_widget((FilterRule *)rule, (RuleContext *)context);

    gd = (GnomeDialog *)gnome_dialog_new(_("New VFolder"),
                         GNOME_STOCK_BUTTON_OK,
                         GNOME_STOCK_BUTTON_CANCEL,
                         NULL);
    gnome_dialog_set_default (gd, 0);

    gtk_window_set_policy(GTK_WINDOW(gd), FALSE, TRUE, FALSE);
    gtk_window_set_default_size (GTK_WINDOW (gd), 500, 500);
    gtk_box_pack_start((GtkBox *)gd->vbox, w, TRUE, TRUE, 0);
    gtk_widget_show((GtkWidget *)gd);
    gtk_object_set_data_full((GtkObject *)gd, "rule", rule, (GtkDestroyNotify)gtk_object_unref);
    gtk_signal_connect((GtkObject *)gd, "clicked", new_rule_clicked, NULL);
    gtk_widget_show((GtkWidget *)gd);
}

void
vfolder_gui_add_from_message(CamelMimeMessage *msg, int flags, const char *source)
{
    VfolderRule *rule;

    g_return_if_fail (msg != NULL);

    rule = (VfolderRule*)vfolder_rule_from_message(context, msg, flags, source);
    vfolder_gui_add_rule(rule);
}

void
vfolder_gui_add_from_mlist(CamelMimeMessage *msg, const char *mlist, const char *source)
{
    VfolderRule *rule;

    g_return_if_fail (msg != NULL);

    rule = (VfolderRule*)vfolder_rule_from_mlist(context, mlist, source);
    vfolder_gui_add_rule(rule);
}

EvolutionStorage *
mail_vfolder_get_vfolder_storage (void)
{
    return mail_lookup_storage(vfolder_store);
}