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#include <assert.h>
#include <ctype.h>
#include <dirent.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define BUF_LEN 1024
#define MAX_GRPS 50
typedef struct entry{
char name[BUF_LEN];
char path[BUF_LEN];
struct entry *next;
} ENTRY;
typedef struct group{
char name[BUF_LEN];
char path[BUF_LEN];
struct entry *head;
struct entry *tail;
struct group *next;
} GROUP;
void check_line(char *buffer);
ENTRY *create_entry(char *new_path, char *new_group);
GROUP *create_group(char *new_path);
void group_add(char *gname, ENTRY *addme);
GROUP *groups_head;
GROUP *gp; //pointer to remember last group that was looked at
int main(){
FILE *fp;
char buffer[BUF_LEN];
fp = fopen("config", "r");
assert(fp != NULL);
while(fgets(buffer, BUF_LEN, fp)){
check_line(buffer);
}
//DEBUG: test to see if the list was added to properly
GROUP *gtrav = groups_head;
ENTRY *etrav;
while(gtrav != NULL){
etrav = gtrav->head;
while(etrav != NULL){
printf("%s, from group %s\n", etrav->name, gtrav->name);
etrav = etrav->next;
}
gtrav = gtrav->next;
}
return 0;
}
void check_line(char *buffer){
char *delims = " \t\n";
char *tok = strtok(buffer, delims);
DIR *dp;
struct dirent *entry;
ENTRY *new;
//add a path to the entry list
//TODO add potential dash functions
//TODO account for spaces in file name
if(!(strcmp(tok, "add"))){
tok = strtok(NULL, delims);
new = create_entry(tok, NULL);
if(new != NULL) group_add(tok, new);
}
//recursively add entries from a directory
if(!(strcmp(tok, "addDir"))){
tok = strtok(NULL, delims);
dp = opendir(tok);
//check if the directory is valid
if(dp == NULL) printf("Error: Invalid Directory \"%s\"\n", tok);
else{
while((entry = readdir(dp))){
//only add if its a file (d_type = 8)
if(entry->d_type == 8){
new = create_entry(entry->d_name, tok);
if(new != NULL) group_add(tok, new);
}
}
}
//TODO add option to also add files from directories inside directory (-r)
closedir(dp);
}
return;
}
ENTRY *create_entry(char *new_path, char *new_group){
ENTRY *new;
char full_path[BUF_LEN] = "";
if(new_group != NULL) strcat(full_path, new_group);
strcat(full_path, new_path);
//check if file exists
if(access(full_path, F_OK) == -1){
printf("Error: Invalid File Name \"%s\"\n", full_path);
return NULL;
}
new = malloc(sizeof(ENTRY));
strcpy(new->name, new_path);
strcpy(new->path, full_path);
new->next = NULL;
return new;
}
GROUP *create_group(char *new_path){
GROUP *new = malloc(sizeof(GROUP));
strcpy(new->name, new_path); //by default, group name is equivalent to the path
strcpy(new->path, new_path);
new->head = NULL;
new->tail = NULL;
new->next = NULL;
return new;
}
//FIXME maybe make this function part of a seperate file to handle a tree (AVL?)
//for now, simple linked list implementation
void group_add(char *gname, ENTRY *addme){
int i;
bool new_group = false; //do we need to create a new group?
GROUP *new;
GROUP *last = NULL; //last element in an existing group list (NULL to start)
//The previous group is not the same as the new group to add to
if(!(gp != NULL && (!(strcmp(gp->name, gname)) || !(strcmp(gp->path, gname))))){
gp = groups_head;
while(gp != NULL){
//gname matches groups[i]'s name or path, add entry here
if(!(strcmp(gp->name, gname)) || !(strcmp(gp->path, gname))) break;
last = gp;
gp = gp->next;
}
}
//was unable to find a matching existing group
if(gp == NULL) new_group = true;
//need to create new group to insert the entry into
if(new_group){
new = create_group(gname);
//first group
if(last == NULL) groups_head = new;
//add to the end of the groups
else last->next = new;
gp = new;
}
//add the entry to the list of entries in the group
if(gp->head == NULL){
gp->head = addme;
gp->tail = addme;
}
else{
gp->tail->next = addme;
gp->tail = addme;
}
return;
}
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