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/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY 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 <https://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include "chat.h"
struct Node {
size_t id;
char *str;
enum Color color;
struct Node *prev;
struct Node *next;
};
static struct Node *alloc(size_t id, const char *str, enum Color color) {
struct Node *node = malloc(sizeof(*node));
if (!node) err(EX_OSERR, "malloc");
node->id = id;
node->str = strdup(str);
if (!node->str) err(EX_OSERR, "strdup");
node->color = color;
node->prev = NULL;
node->next = NULL;
return node;
}
static struct Node *head;
static struct Node *tail;
static struct Node *detach(struct Node *node) {
if (node->prev) node->prev->next = node->next;
if (node->next) node->next->prev = node->prev;
if (head == node) head = node->next;
if (tail == node) tail = node->prev;
node->prev = NULL;
node->next = NULL;
return node;
}
static struct Node *prepend(struct Node *node) {
node->prev = NULL;
node->next = head;
if (head) head->prev = node;
head = node;
if (!tail) tail = node;
return node;
}
static struct Node *append(struct Node *node) {
node->next = NULL;
node->prev = tail;
if (tail) tail->next = node;
tail = node;
if (!head) head = node;
return node;
}
static struct Node *find(size_t id, const char *str) {
for (struct Node *node = head; node; node = node->next) {
if (node->id == id && !strcmp(node->str, str)) return node;
}
return NULL;
}
void completeAdd(size_t id, const char *str, enum Color color) {
if (!find(id, str)) append(alloc(id, str, color));
}
void completeTouch(size_t id, const char *str, enum Color color) {
struct Node *node = find(id, str);
if (node && node->color != color) node->color = color;
prepend(node ? detach(node) : alloc(id, str, color));
}
static struct Node *match;
const char *complete(size_t id, const char *prefix) {
for (match = (match ? match->next : head); match; match = match->next) {
if (match->id && match->id != id) continue;
if (strncasecmp(match->str, prefix, strlen(prefix))) continue;
return match->str;
}
return NULL;
}
void completeAccept(void) {
if (match) prepend(detach(match));
match = NULL;
}
void completeReject(void) {
match = NULL;
}
void completeRemove(size_t id, const char *str) {
struct Node *next = NULL;
for (struct Node *node = head; node; node = next) {
next = node->next;
if (id && node->id != id) continue;
if (strcmp(node->str, str)) continue;
if (match == node) match = NULL;
detach(node);
free(node->str);
free(node);
}
}
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