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authorTed Gould <ted@gould.cx>2010-08-13 12:22:42 -0500
committerTed Gould <ted@gould.cx>2010-08-13 12:22:42 -0500
commit564b2afe7960f5b277070c00370cbf1358e5246f (patch)
tree6711d5bfabf1b02f08f169a61dd1c34a2f2d6260 /src/application-service-lru-file.c
parent7a4bfc9135ea55b0f495513fbd7ad2734b328098 (diff)
parentd81670cc9cf081b1296561d9da2176975da7643b (diff)
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Updating to trunk
Diffstat (limited to 'src/application-service-lru-file.c')
-rw-r--r--src/application-service-lru-file.c473
1 files changed, 0 insertions, 473 deletions
diff --git a/src/application-service-lru-file.c b/src/application-service-lru-file.c
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-/*
-This object manages the database of when the entires were touched
-and loved. And writes that out to disk occationally as well.
-
-Copyright 2010 Canonical Ltd.
-
-Authors:
- Ted Gould <ted@canonical.com>
-
-This program is free software: you can redistribute it and/or modify it
-under the terms of the GNU General Public License version 3, as published
-by the Free Software Foundation.
-
-This program is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranties of
-MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
-PURPOSE. See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <string.h>
-#include <gio/gio.h>
-#include <json-glib/json-glib.h>
-#include "application-service-lru-file.h"
-
-#define ENTRY_CATEGORY "category"
-#define ENTRY_FIRST_TIME "first-time"
-#define ENTRY_LAST_TIME "last-time"
-#define ENTRY_VERSION "version"
-
-#define CONFIG_DIR ("indicators" G_DIR_SEPARATOR_S "application")
-#define CONFIG_FILE "lru-file.json"
-
-typedef struct _AppLruFilePrivate AppLruFilePrivate;
-struct _AppLruFilePrivate {
- GHashTable * apps;
- gboolean dirty;
- guint timer;
- gchar * filename;
-};
-
-typedef struct _AppData AppData;
-struct _AppData {
- gchar * category;
- GTimeVal last_touched;
- GTimeVal first_touched;
-};
-
-#define APP_LRU_FILE_GET_PRIVATE(o) \
- (G_TYPE_INSTANCE_GET_PRIVATE ((o), APP_LRU_FILE_TYPE, AppLruFilePrivate))
-
-static void app_lru_file_class_init (AppLruFileClass *klass);
-static void app_lru_file_init (AppLruFile *self);
-static void app_lru_file_dispose (GObject *object);
-static void app_lru_file_finalize (GObject *object);
-static void app_data_free (gpointer data);
-static void get_dirty (AppLruFile * lrufile);
-static gboolean load_from_file (gpointer data);
-static void load_file_object_cb (JsonObject * obj, const gchar * key, JsonNode * value, gpointer data);
-static void clean_off_hash_cb (gpointer key, gpointer value, gpointer data);
-static void clean_off_write_end_cb (GObject * obj, GAsyncResult * res, gpointer data);
-
-G_DEFINE_TYPE (AppLruFile, app_lru_file, G_TYPE_OBJECT);
-
-/* Set up the class variable stuff */
-static void
-app_lru_file_class_init (AppLruFileClass *klass)
-{
- GObjectClass *object_class = G_OBJECT_CLASS (klass);
-
- g_type_class_add_private (klass, sizeof (AppLruFilePrivate));
-
- object_class->dispose = app_lru_file_dispose;
- object_class->finalize = app_lru_file_finalize;
-
- return;
-}
-
-/* Set all the data of the per-instance variables */
-static void
-app_lru_file_init (AppLruFile *self)
-{
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(self);
-
- /* Default values */
- priv->apps = NULL;
- priv->dirty = FALSE;
- priv->timer = 0;
- priv->filename = NULL;
-
- /* Now let's build some stuff */
- priv->apps = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, app_data_free);
- priv->filename = g_build_filename(g_get_user_config_dir(), CONFIG_DIR, CONFIG_FILE, NULL);
-
- /* No reason to delay other stuff for this, we'll
- merge any values that get touched. */
- g_idle_add(load_from_file, self);
-
- return;
-}
-
-/* Get rid of objects and other big things */
-static void
-app_lru_file_dispose (GObject *object)
-{
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(object);
-
- if (priv->timer != 0) {
- g_source_remove(priv->timer);
- priv->timer = 0;
- }
-
- if (priv->apps != NULL) {
- /* Cleans up the keys and entries itself */
- g_hash_table_destroy(priv->apps);
- priv->apps = NULL;
- }
-
- G_OBJECT_CLASS (app_lru_file_parent_class)->dispose (object);
- return;
-}
-
-/* Deallocate memory */
-static void
-app_lru_file_finalize (GObject *object)
-{
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(object);
-
- if (priv->filename != NULL) {
- g_free(priv->filename);
- priv->filename = NULL;
- }
-
- G_OBJECT_CLASS (app_lru_file_parent_class)->finalize (object);
- return;
-}
-
-/* Takes an AppData structure and free's the
- memory from it. */
-static void
-app_data_free (gpointer data)
-{
- AppData * appdata = (AppData *)data;
-
- if (appdata->category != NULL) {
- g_free(appdata->category);
- }
-
- g_free(appdata);
-
- return;
-}
-
-/* Loads all of the data out of a json file */
-static gboolean
-load_from_file (gpointer data)
-{
- AppLruFile * lrufile = (AppLruFile *)data;
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(lrufile);
-
- if (!g_file_test(priv->filename, G_FILE_TEST_EXISTS)) {
- return FALSE;
- }
-
- JsonParser * parser = json_parser_new();
-
- if (!json_parser_load_from_file(parser, priv->filename, NULL)) {
- g_warning("Unable to parse JSON file '%s'", priv->filename);
- g_object_unref(parser);
- return FALSE;
- }
-
- JsonNode * root = json_parser_get_root(parser);
- JsonObject * rootobj = json_node_get_object(root);
- if (rootobj == NULL) {
- g_warning("Malformed LRU file. The root node is not an object.");
- g_object_unref(parser);
- return FALSE;
- }
-
- json_object_foreach_member(rootobj, load_file_object_cb, lrufile);
-
- g_object_unref(parser);
- return FALSE;
-}
-
-/* Looks at the various things that we need on a node, makes
- sure that we have them, and then copies them into the
- application hash table of love. */
-static void
-load_file_object_cb (JsonObject * rootobj, const gchar * key, JsonNode * value, gpointer data)
-{
- AppLruFile * lrufile = (AppLruFile *)data;
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(lrufile);
-
- /* We're not looking at this today. */
- if (!g_strcmp0(key, ENTRY_VERSION)) {
- return;
- }
-
- JsonObject * obj = json_node_get_object(value);
- if (obj == NULL) {
- g_warning("Data for node '%s' is not an object.", key);
- return;
- }
-
- const gchar * obj_category = json_object_get_string_member(obj, ENTRY_CATEGORY);
- const gchar * obj_first = json_object_get_string_member(obj, ENTRY_FIRST_TIME);
- const gchar * obj_last = json_object_get_string_member(obj, ENTRY_LAST_TIME);
-
- if (obj_category == NULL || obj_first == NULL || obj_last == NULL) {
- g_warning("Node '%s' is missing data. Got: ('%s', '%s', '%s')", key, obj_category, obj_first, obj_last);
- get_dirty(lrufile);
- return;
- }
-
- /* Check to see how old this entry is. If it hasn't been
- used in the last year, we remove the cruft. */
- GTimeVal currenttime;
- g_get_current_time(&currenttime);
- GDate * currentdate = g_date_new();
- g_date_set_time_val(currentdate, &currenttime);
-
- GTimeVal lasttouch;
- g_time_val_from_iso8601(obj_last, &lasttouch);
- GDate * lastdate = g_date_new();
- g_date_set_time_val(lastdate, &lasttouch);
-
- gint spread = g_date_days_between(lastdate, currentdate);
-
- g_date_free(currentdate);
- g_date_free(lastdate);
-
- if (spread > 365) {
- g_debug("Removing node '%s' as it's %d days old.", key, spread);
- get_dirty(lrufile);
- return;
- }
-
- /* See if we already have one of these. It's a little bit
- unlikely, but since we're async, we need to check */
- gpointer datapntr = g_hash_table_lookup(priv->apps, key);
- if (datapntr == NULL) {
- /* Build a new node */
- AppData * appdata = g_new0(AppData, 1);
- appdata->category = g_strdup(obj_category);
- g_time_val_from_iso8601(obj_first, &appdata->first_touched);
- g_time_val_from_iso8601(obj_last, &appdata->last_touched);
-
- g_hash_table_insert(priv->apps, g_strdup(key), appdata);
- } else {
- /* Merge nodes */
- AppData * appdata = (AppData *)datapntr;
- GTimeVal temptime;
- g_time_val_from_iso8601(obj_first, &temptime);
-
- if (temptime.tv_sec < appdata->first_touched.tv_sec) {
- g_time_val_from_iso8601(obj_first, &appdata->first_touched);
- }
- }
-
- return;
-}
-
-/* Write out our cache to a file so that we can unmark the dirty
- bit and be happy. */
-static gboolean
-clean_off (gpointer data)
-{
- AppLruFile * lrufile = (AppLruFile *)data;
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(lrufile);
- priv->timer = 0;
-
- GError * error = NULL;
-
- /* Check to see if our directory exists. Build it if not. */
- gchar * dirname = g_build_filename(g_get_user_config_dir(), CONFIG_DIR, NULL);
- if (!g_file_test(dirname, G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR)) {
- GFile * dirfile = g_file_new_for_path(dirname);
- g_file_make_directory_with_parents(dirfile, NULL, NULL);
- g_object_unref(dirfile);
- }
- g_free(dirname);
-
- GFile * file = g_file_new_for_path(priv->filename);
- GFileOutputStream * ostream = g_file_replace(file,
- NULL, /* etag */
- TRUE, /* backup */
- G_FILE_CREATE_NONE, /* flags */
- NULL, /* cancelable */
- &error);
- if (error != NULL) {
- g_warning("Unable to open a file to store LRU file: %s", error->message);
- return FALSE;
- }
-
- /* This is how the file will start */
- GString * filestring = g_string_new("{\n \"" ENTRY_VERSION "\": 1");
-
- /* Put the middle in. */
- g_hash_table_foreach (priv->apps, clean_off_hash_cb, filestring);
-
- /* And then tack on the end. */
- g_string_append(filestring, "\n}\n");
- gchar * filedata = g_string_free(filestring, FALSE);
- g_output_stream_write_async(G_OUTPUT_STREAM(ostream),
- filedata,
- strlen(filedata),
- G_PRIORITY_DEFAULT_IDLE,
- NULL,
- clean_off_write_end_cb,
- filedata);
-
- return FALSE; /* drop the timer */
-}
-
-/* Looks at every value in the applications hash table and
- turns it into a string for writing out. */
-static void
-clean_off_hash_cb (gpointer key, gpointer value, gpointer data)
-{
- /* Mega-cast */
- gchar * id = (gchar *)key;
- AppData * appdata = (AppData *)value;
- GString * string = (GString *)data;
-
- gchar * firsttime = g_time_val_to_iso8601(&appdata->first_touched);
- gchar * lasttime = g_time_val_to_iso8601(&appdata->last_touched);
-
- g_string_append_printf(string, ",\n \"%s\": { \"" ENTRY_FIRST_TIME "\": \"%s\", \"" ENTRY_LAST_TIME "\": \"%s\", \"" ENTRY_CATEGORY "\": \"%s\"}", id, firsttime, lasttime, appdata->category);
-
- g_free(lasttime);
- g_free(firsttime);
-
- return;
-}
-
-/* Very much like clean_off_write_cb except that it is the
- last actor on this Output Stream so it closes it. */
-static void
-clean_off_write_end_cb (GObject * obj, GAsyncResult * res, gpointer data)
-{
- g_free(data);
-
- GError * error = NULL;
- g_output_stream_close(G_OUTPUT_STREAM(obj), NULL, &error);
-
- if (error != NULL) {
- g_warning("Unable to close LRU File: %s", error->message);
- g_error_free(error);
- }
-
- return;
-}
-
-/* Sets the dirty bit if not already set and makes sure that
- we have a timer to fix that at some point. */
-static void
-get_dirty (AppLruFile * lrufile)
-{
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(lrufile);
-
- priv->dirty = TRUE;
-
- if (priv->timer == 0) {
- priv->timer = g_timeout_add_seconds(60, clean_off, lrufile);
- }
-
- return;
-}
-
-/* API */
-
-/* Simple helper to create a new object */
-AppLruFile *
-app_lru_file_new (void)
-{
- return APP_LRU_FILE(g_object_new(APP_LRU_FILE_TYPE, NULL));
-}
-
-/* This updates the timestamp for a particular
- entry in the database. It also queues up a
- write out of the database. But that'll happen
- later. */
-void
-app_lru_file_touch (AppLruFile * lrufile, const gchar * id, const gchar * category)
-{
- g_return_if_fail(IS_APP_LRU_FILE(lrufile));
- g_return_if_fail(id != NULL && id[0] != '\0');
- g_return_if_fail(category != NULL && category[0] != '\0');
-
- AppData * appdata = NULL;
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(lrufile);
- gpointer data = g_hash_table_lookup(priv->apps, id);
-
- if (data == NULL) {
- /* Oh, we don't have one, let's build it and put it
- into the hash table ourselves */
- appdata = g_new0(AppData, 1);
-
- appdata->category = g_strdup(category);
- g_get_current_time(&(appdata->first_touched));
- /* NOTE: last touched set below */
-
- g_hash_table_insert(priv->apps, g_strdup(id), appdata);
- } else {
- /* Boring, we've got this one already */
- appdata = (AppData *)data;
- }
-
- /* Touch it and mark the DB as dirty */
- g_get_current_time(&(appdata->last_touched));
- get_dirty(lrufile);
- return;
-}
-
-/* Used to sort or compare different applications. */
-gint
-app_lru_file_sort (AppLruFile * lrufile, const gchar * id_a, const gchar * id_b)
-{
- g_return_val_if_fail(IS_APP_LRU_FILE(lrufile), -1);
-
- /* Let's first look to see if the IDs are the same, this
- really shouldn't happen, but it'll be confusing if we
- don't get it out of the way to start. */
- if (g_strcmp0(id_a, id_b) == 0) {
- return 0;
- }
-
- AppLruFilePrivate * priv = APP_LRU_FILE_GET_PRIVATE(lrufile);
-
- /* Now make sure we have app data for both of these. If
- not we'll assume that the one without is newer? */
- gpointer data_a = g_hash_table_lookup(priv->apps, id_a);
- if (data_a == NULL) {
- return -1;
- }
-
- gpointer data_b = g_hash_table_lookup(priv->apps, id_b);
- if (data_b == NULL) {
- return 1;
- }
-
- /* Ugly casting */
- AppData * appdata_a = (AppData *)data_a;
- AppData * appdata_b = (AppData *)data_b;
-
- /* Look at categories, we'll put the categories in alpha
- order if they're not the same. */
- gint catcompare = g_strcmp0(appdata_a->category, appdata_b->category);
- if (catcompare != 0) {
- return catcompare;
- }
-
- /* Now we're looking at the first time that these two were
- seen in this account. Only using seconds. I mean, seriously. */
- if (appdata_a->first_touched.tv_sec < appdata_b->first_touched.tv_sec) {
- return -1;
- }
- if (appdata_b->first_touched.tv_sec < appdata_a->first_touched.tv_sec) {
- return 1;
- }
-
- /* Eh, this seems roughly impossible. But if we have to choose,
- I like A better. */
- return 1;
-}