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/* $Id: query.c 41 2024-08-22 04:26:35Z nishi $ */

#include "rv_query.h"

#include "rv_util.h"

#include <string.h>
#include <stdlib.h>
#include <stdio.h>

struct query_entry {
        char* key;
        char* value;
};

struct query_entry** qentries;

struct query_entry** query = NULL;
struct query_entry** postquery = NULL;

void rv_save_query(char c) {
        if(c == 'Q') {
                query = qentries;
        } else if(c == 'P') {
                postquery = qentries;
        }
}

void rv_load_query(char c) {
        if(c == 'Q') {
                qentries = query;
        } else if(c == 'P') {
                qentries = postquery;
        }
}

void rv_parse_query(const char* oldquery) {
        char* query = rv_strdup(oldquery);
        int i;
        int incr = 0;
        qentries = malloc(sizeof(*qentries));
        qentries[0] = NULL;
        for(i = 0;; i++) {
                if(query[i] == '&' || query[i] == 0) {
                        char oldc = query[i];
                        query[i] = 0;

                        char* key = query + incr;
                        char* value = "";

                        int j;
                        for(j = 0; key[j] != 0; j++) {
                                if(key[j] == '=') {
                                        key[j] = 0;
                                        value = key + j + 1;
                                        break;
                                }
                        }

                        struct query_entry* entry = malloc(sizeof(*entry));
                        entry->key = rv_url_decode(key);
                        entry->value = rv_url_decode(value);

                        struct query_entry** old_entries = qentries;
                        for(j = 0; old_entries[j] != NULL; j++)
                                ;
                        qentries = malloc(sizeof(*qentries) * (j + 2));
                        for(j = 0; old_entries[j] != NULL; j++) {
                                qentries[j] = old_entries[j];
                        }
                        qentries[j] = entry;
                        qentries[j + 1] = NULL;
                        free(old_entries);

                        incr = i + 1;
                        if(oldc == 0) break;
                }
        }
        free(query);
}

void rv_free_query(void) {
        int i;
        for(i = 0; qentries[i] != NULL; i++) {
                free(qentries[i]->key);
                free(qentries[i]->value);
                free(qentries[i]);
        }
        free(qentries);
}

char* rv_get_query(const char* key) {
        int i;
        if(qentries == NULL) return NULL;
        for(i = 0; qentries[i] != NULL; i++) {
                if(strcmp(qentries[i]->key, key) == 0) {
                        return qentries[i]->value;
                }
        }
        return NULL;
}