-// $Id: settings.c,v 1.2 2007-03-28 04:33:41 quinn Exp $
+// $Id: settings.c,v 1.3 2007-03-29 13:44:19 quinn Exp $
// This module implements a generic system of settings (attribute-value) that can
// be associated with search targets. The system supports both default values,
// per-target overrides, and per-user settings.
#include <yaz/nmem.h>
#include <yaz/log.h>
-static NMEM nmem = 0;
+#include "pazpar2.h"
+#include "database.h"
+#include "settings.h"
-#define PZ_PIGGYBACK 0
-#define PZ_ELEMENTS 1
-#define PZ_SYNTAX 2
+static NMEM nmem = 0;
+// Used for initializing setting_dictionary with pazpar2-specific settings
static char *hard_settings[] = {
"pz:piggyback",
"pz:elements",
0
};
-struct setting
-{
- char *target;
- char *name;
- char *value;
- char *user;
-};
-
struct setting_dictionary
{
char **dict;
int num;
};
+static struct setting_dictionary *dictionary = 0;
+
+int settings_offset(const char *name)
+{
+ int i;
+
+ for (i = 0; i < dictionary->num; i++)
+ if (!strcmp(name, dictionary->dict[i]))
+ return i;
+ return -1;
+}
+
+char *settings_name(int offset)
+{
+ return dictionary->dict[offset];
+}
+
static int isdir(const char *path)
{
struct stat st;
return st.st_mode & S_IFDIR;
}
-static void read_settings_file(const char *path, void *context,
- void (*fun)(void *context, struct setting *set))
+// Read settings from an XML file, calling handler function for each setting
+static void read_settings_file(const char *path,
+ void (*fun)(struct setting *set))
{
xmlDoc *doc = xmlParseFile(path);
xmlNode *n;
- //xmlChar *namea, *targeta, *valuea, *usera;
+ xmlChar *namea, *targeta, *valuea, *usera, *precedencea;
if (!doc)
{
exit(1);
}
n = xmlDocGetRootElement(doc);
-
+ namea = xmlGetProp(n, (xmlChar *) "name");
+ targeta = xmlGetProp(n, (xmlChar *) "target");
+ valuea = xmlGetProp(n, (xmlChar *) "value");
+ usera = xmlGetProp(n, (xmlChar *) "user");
+ precedencea = xmlGetProp(n, (xmlChar *) "precedence");
for (n = n->children; n; n = n->next)
{
- fprintf(stderr, "Node name: %s\n", n->name);
+ if (n->type != XML_ELEMENT_NODE)
+ continue;
+ if (!strcmp(n->name, (xmlChar *) "set"))
+ {
+ char *name, *target, *value, *user, *precedence;
+
+ name = xmlGetProp(n, (xmlChar *) "name");
+ target = xmlGetProp(n, (xmlChar *) "target");
+ value = xmlGetProp(n, (xmlChar *) "value");
+ user = xmlGetProp(n, (xmlChar *) "user");
+ precedence = xmlGetProp(n, (xmlChar *) "precedence");
+
+ if ((!name && !namea) || (!value && !valuea) || (!target && !targeta))
+ {
+ yaz_log(YLOG_FATAL, "set must specify name, value, and target");
+ exit(1);
+ }
+ else
+ {
+ struct setting set;
+ char nameb[1024];
+ char targetb[1024];
+ char userb[1024];
+ char valueb[1024];
+
+ // Copy everything into a temporary buffer -- we decide
+ // later if we are keeping it.
+ if (precedence)
+ set.precedence = atoi((char *) precedence);
+ else if (precedencea)
+ set.precedence = atoi((char *) precedencea);
+ else
+ set.precedence = 0;
+ set.user = userb;
+ if (user)
+ strcpy(userb, user);
+ else if (usera)
+ strcpy(userb, usera);
+ else
+ set.user = "";
+ if (target)
+ strcpy(targetb, target);
+ else
+ strcpy(targetb, targeta);
+ set.target = targetb;
+ if (name)
+ strcpy(nameb, name);
+ else
+ strcpy(nameb, namea);
+ set.name = nameb;
+ if (value)
+ strcpy(valueb, value);
+ else
+ strcpy(valueb, valuea);
+ set.value = valueb;
+ set.next = 0;
+ (*fun)(&set);
+ }
+ xmlFree(name);
+ xmlFree(precedence);
+ xmlFree(value);
+ xmlFree(user);
+ xmlFree(target);
+ }
+ else
+ {
+ yaz_log(YLOG_FATAL, "Unknown element %s in settings file", (char*) n->name);
+ exit(1);
+ }
}
+ xmlFree(namea);
+ xmlFree(precedencea);
+ xmlFree(valuea);
+ xmlFree(usera);
+ xmlFree(targeta);
}
// Recursively read files in a directory structure, calling
-static void read_settings(const char *path, void *context,
- void (*fun)(void *context, struct setting *set))
+// callback for each one
+static void read_settings(const char *path,
+ void (*fun)(struct setting *set))
{
DIR *d;
struct dirent *de;
continue;
sprintf(tmp, "%s/%s", path, de->d_name);
if (isdir(tmp))
- read_settings(tmp, context, fun);
+ read_settings(tmp, fun);
else
{
char *dot;
if ((dot = rindex(de->d_name, '.')) && !strcmp(dot + 1, "xml"))
- read_settings_file(tmp, context, fun);
+ read_settings_file(tmp, fun);
}
}
closedir(d);
// Callback. Adds a new entry to the dictionary if necessary
// This is used in pass 1 to determine layout of dictionary
-static void prepare_dictionary(void *context, struct setting *set)
+static void prepare_dictionary(struct setting *set)
{
- struct setting_dictionary *dict = (struct setting_dictionary *) context;
int i;
- for (i = 0; i < dict->num; i++)
- if (!strcmp(set->name, set->name))
+ for (i = 0; i < dictionary->num; i++)
+ if (!strcmp(dictionary->dict[i], set->name))
return;
// Create a new dictionary entry
// Grow dictionary if necessary
- if (!dict->size)
- dict->dict = nmem_malloc(nmem, (dict->size = 50) * sizeof(char*));
- else if (dict->num + 1 > dict->size)
+ if (!dictionary->size)
+ dictionary->dict = nmem_malloc(nmem, (dictionary->size = 50) * sizeof(char*));
+ else if (dictionary->num + 1 > dictionary->size)
+ {
+ char **tmp = nmem_malloc(nmem, dictionary->size * 2 * sizeof(char*));
+ memcpy(tmp, dictionary->dict, dictionary->size * sizeof(char*));
+ dictionary->dict = tmp;
+ dictionary->size *= 2;
+ }
+ dictionary->dict[dictionary->num++] = nmem_strdup(nmem, set->name);
+}
+
+// This is called from grep_databases -- adds/overrides setting for a target
+// This is also where the rules for precedence of settings are implemented
+static void update_database(void *context, struct database *db)
+{
+ struct setting *set = (struct setting *) context;
+ struct setting *s, **sp;
+ int offset;
+
+ if (!db->settings)
{
- char **tmp = nmem_malloc(nmem, dict->size * 2 * sizeof(char*));
- memcpy(tmp, dict->dict, dict->size * sizeof(char*));
- dict->dict = tmp;
- dict->size *= 2;
+ db->settings = nmem_malloc(nmem, sizeof(struct settings*) * dictionary->num);
+ memset(db->settings, sizeof(struct settings*) * dictionary->num, 0);
+ }
+ if ((offset = settings_offset(set->name)) < 0)
+ abort(); // Should never get here
+
+ // First we determine if this setting is overriding any existing settings
+ // with the same name.
+ for (s = db->settings[offset], sp = &db->settings[offset]; s;
+ sp = &s->next, s = s->next)
+ if (!strcmp(s->user, set->user))
+ {
+ if (s->precedence < set->precedence)
+ // We discard the value (nmem keeps track of the space)
+ *sp = (*sp)->next;
+ else if (s->precedence > set->precedence)
+ // Db contains a higher-priority setting. Abort
+ break;
+ if (*s->target == '*' && *set->target != '*')
+ // target-specific value trumps wildcard. Delete.
+ *sp = (*sp)->next;
+ else if (*s->target != '*' && *set->target == '*')
+ // Db already contains higher-priority setting. Abort
+ break;
+ }
+ if (!s) // s will be null when there are no higher-priority settings -- we add one
+ {
+ struct setting *new = nmem_malloc(nmem, sizeof(*new));
+
+ memset(new, sizeof(*new), 0);
+ new->precedence = set->precedence;
+ new->target = nmem_strdup(nmem, set->target);
+ new->name = nmem_strdup(nmem, set->name);
+ new->value = nmem_strdup(nmem, set->value);
+ new->user = nmem_strdup(nmem, set->user);
+ new->next = db->settings[offset];
+ db->settings[offset] = new;
}
- dict->dict[dict->num++] = nmem_strdup(nmem, set->name);
}
-#ifdef GAGA
// Callback -- updates database records with dictionary entries as appropriate
-static void update_databases(void *context, struct setting *set)
+// This is used in pass 2 to assign name/value pairs to databases
+static void update_databases(struct setting *set)
{
+ struct database_criterion crit;
+ struct database_criterion_value val;
+
+ // Update all databases which match pattern in set->target
+ crit.name = "id";
+ crit.values = &val;
+ crit.next = 0;
+ val.value = set->target;
+ val.next = 0;
+ grep_databases(set, &crit, update_database);
}
-#endif
// This simply copies the 'hard' (application-specific) settings
// to the settings dictionary.
new = nmem_malloc(nmem, sizeof(*new));
initialize_hard_settings(new);
memset(new, sizeof(*new), 0);
- read_settings(path, new, prepare_dictionary);
- //read_settings(path, new, update_databases);
+ dictionary = new;
+ read_settings(path, prepare_dictionary);
+ read_settings(path, update_databases);
}
/*
projects / pazpar2-moved-to-github.git / commitdiff