diff --git a/include/object.h b/include/object.h
index 65432e6..bfce57c 100644
--- a/include/object.h
+++ b/include/object.h
@@ -24,9 +24,12 @@
 #include "hash.h"
 #include "file.h"
 #include "tree.h"
-#include "utilities.h"
+#include "common.h"
 
 char* get_object(char*, size_t*);
 void* parse_object(char*, ObjectType, size_t*);
+int save_diff(ActionList*, char*, char*, size_t, char*, File*, int);
+int read_diff(char*, char*, ActionList*);
+int save_file_diff(char*, char*, size_t, char*, Changes*);
 
 #endif // OBJECT_H
\ No newline at end of file
diff --git a/include/utilities.h b/include/utilities.h
index e42aa53..a6b1209 100644
--- a/include/utilities.h
+++ b/include/utilities.h
@@ -9,11 +9,6 @@
 #include "myers.h"
 #include "action_list.h"
 
-#define IS_ALPHA(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
-#define IS_DIGIT(c) (c >= '0' && c <= '9')
-#define IS_ALNUM(c) (IS_ALPHA(c) || IS_DIGIT(c))
-#define IS_PUNCT(c) ((c >= 33 && c <= 47) || (c >= 58 && c <= 64) || (c >= 91 && c <= 96) || (c >= 123 && c <= 126))
-
 #define RESET "\033[0m"
 #define RED_BG "\033[41m"
 #define GREEN_BG "\033[42m"
@@ -29,10 +24,6 @@ typedef enum {
 
 typedef List StringBuffer;
 
-typedef struct {
-    uint32_t insertions;
-    uint32_t deletions;
-} Changes;
 
 StringBuffer* string_buffer_new();
 int string_buffer_push(StringBuffer*, char*);
@@ -42,15 +33,12 @@ char* find_root(char*);
 void walk(char*, char*, char*, FileInfoBuffer*, int, char*);
 char* get_repo_path(char*, char*);
 int is_in_repo(char*, char*);
-void visualize_diff(File*, File*, ActionList*);
 int cut_path(char*, char*);
 void combine_path(char*, char*);
 PathType get_path_type(const char*);
 char* get_file_content(char*);
 char* get_file_content_with_size(char*, size_t*);
 int create_default_config_file(char*);
-int save_diff(ActionList*, char*, char*, size_t, char*, File*, int);
-int read_diff(char*, char*, ActionList*);
-int save_file_diff(char*, char*, size_t, char*, Changes*);
+
 
 #endif // UTILITIES_H
diff --git a/src/object.c b/src/object.c
index 343afa6..e121b63 100644
--- a/src/object.c
+++ b/src/object.c
@@ -114,4 +114,377 @@ void* parse_object(char* hash, ObjectType type, size_t* size_out) {
 
         default: free(content); return NULL;
     }
+}
+
+static int mkdir_recursive(const char *path, mode_t mode) {
+    char *path_copy = strdup(path);
+    if (!path_copy) return -1;
+
+    char *p = path_copy;
+
+    if (*p == '/') p++;
+
+    while (*p) {
+        while (*p && *p != '/') p++;
+
+        char saved = *p;
+        *p = '\0';
+
+        if (mkdir(path_copy, mode) == -1 && errno != EEXIST) {
+            free(path_copy);
+            return -1;
+        }
+
+        *p = saved;
+        if (*p) p++;
+    }
+
+    free(path_copy);
+    return 0;
+}
+
+int save_diff(ActionList* diff, char* path, char* root, size_t diff_id, char* basefile_hash, File* modified_file, int tree) {
+    size_t buffer_size = 41;
+
+    buffer_size += 1 + snprintf(NULL, 0, "%d", diff->len);
+
+    for (size_t idx = 0; idx < diff->len; idx++) {
+        Action action = diff->actions[idx];
+        if (action.type == DELETE) {
+            // 4 = OPBIT SPACE ... SPACE ... SPACE
+            buffer_size +=
+                4 +
+                snprintf(NULL, 0, "%d", action.line_original) +
+                snprintf(NULL, 0, "%d", action.line_changed);
+            continue;
+        }
+        // 6 = OPBIT SPACE ... SPACE ... SPACE ... SPACE ... SPACE
+        buffer_size +=
+            6 +
+            snprintf(NULL, 0, "%d", action.line_original) +
+            snprintf(NULL, 0, "%d", action.line_changed) +
+            snprintf(NULL, 0, "%zu", strlen(modified_file->content[action.line_changed])) +
+            strlen(modified_file->content[action.line_changed]);
+    }
+
+    char tmp[buffer_size];
+    size_t offset = 0;
+
+    offset += snprintf(tmp, sizeof(tmp), "%s %zu ", basefile_hash, diff->len);
+
+    for (size_t idx = 0; idx < diff->len; idx++) {
+        Action action = diff->actions[idx];
+        size_t remaining = sizeof(tmp) - offset;
+
+        if (action.type == DELETE) {
+            offset += snprintf(tmp + offset, 
+                remaining, 
+                "0 %zu %zu ", 
+                action.line_original, 
+                action.line_changed
+            );
+            continue;
+        }
+
+        offset += snprintf(tmp + offset, remaining, 
+            "1 %zu %zu %zu %s ", 
+            action.line_original, 
+            action.line_changed, 
+            strlen(modified_file->content[action.line_changed]), 
+            modified_file->content[action.line_changed]
+        );
+    }
+
+    char id[2+snprintf(NULL, 0, "%d", diff_id)+strlen(path)];
+    snprintf(id, sizeof(id), "%s %d", path, diff_id);
+    char hash[41];
+    if (tree) object_hash(TreeDiffObject, id, hash);
+    else object_hash(FileDiffObject, id, hash);
+
+    char dir_path[PATH_MAX];
+    char file_path[PATH_MAX];
+    snprintf(dir_path, sizeof(dir_path), "%s/.merk/objects/%.2s", root, hash);
+    mkdir(dir_path, 0755);
+    snprintf(file_path, sizeof(file_path), "%s/%s", dir_path, hash+2);
+
+    if (access(file_path, F_OK) == 0) {
+        return 1;
+    }
+
+    FILE* fp = fopen(file_path, "wb");
+    if (!fp) {
+        perror("ERROR: cannot open path in save_diff!\n");
+        return 0;
+    }
+
+    // Ensure the directory structure exists
+    if (mkdir_recursive(dir_path, 0755) < 0 && errno != EEXIST) {
+        perror("ERROR: failed to create directory structure in save_diff!");
+        return 0;
+    }
+
+    uLong originalLen = strlen(tmp) + 1;
+    uLong compressedLen = compressBound(originalLen);
+    Bytef* compressed = malloc(compressedLen);
+    if (!compressed) {
+        fclose(fp);
+        return 0;
+    }
+
+    if (compress(compressed, &compressedLen, (const Bytef*)tmp, originalLen) != Z_OK) {
+        perror("ERROR: compression failed in save_diff!");
+        free(compressed);
+        fclose(fp);
+        return 0;
+    }
+
+    fprintf(fp, "%lu ", (unsigned long)originalLen);
+
+    fwrite(compressed, 1, compressedLen, fp);
+
+    fclose(fp);
+
+    chmod(file_path, S_IRUSR | S_IRGRP | S_IROTH);
+
+    return 1;
+}
+
+int read_diff(char* content, char* basefile_hash, ActionList* diff_out) {
+    if (!content || !basefile_hash || !diff_out) {
+        return 0;
+    }
+
+    size_t idx = 0;
+    strncpy(basefile_hash, content, 40);
+    basefile_hash[40] = '\0';
+    idx += 41;
+
+    while (content[idx] && IS_DIGIT(content[idx])) {
+        idx++;
+    }
+
+    if (idx == 41) {
+        perror("ERROR: no length found at start of diff!");
+        return 0;
+    }
+
+    char* number_of_actions = calloc(idx - 41 + 1, sizeof(char));
+    if (!number_of_actions) {
+        return 0;
+    }
+
+    memcpy(number_of_actions, content + 41, idx - 41);
+    number_of_actions[idx - 41] = '\0';
+
+    char* end;
+    long actions = strtol(number_of_actions, &end, 10);
+    free(number_of_actions);
+
+    if (end == number_of_actions || *end != '\0' || actions <= 0) {
+        perror("ERROR: invalid number of actions in read_diff!");
+        return 0;
+    }
+
+    size_t action_idx = 0;
+    while (content[idx] && action_idx < (size_t)actions) {
+        idx++;
+
+        Action action = {0};
+
+        if (content[idx] == '0') {
+            idx++;
+            if (content[idx] != ' ') {
+                perror("ERROR: expected space after opbit in read_diff!");
+                return 0;
+            }
+            idx++;
+
+            char* endptr;
+            action.line_original = strtol(content + idx, &endptr, 10);
+            if (endptr == content + idx || *endptr != ' ') {
+                perror("ERROR: failed to parse line_original in read_diff!");
+                return 0;
+            }
+            idx = endptr - content + 1;
+
+            action.line_changed = strtol(content + idx, &endptr, 10);
+            if (endptr == content + idx || (*endptr != ' ' && *endptr != '\0')) {
+                perror("ERROR: failed to parse line_changed in read_diff!");
+                return 0;
+            }
+            idx = endptr - content;
+        } else if (content[idx] == '1') {
+            idx++;
+            if (content[idx] != ' ') {
+                perror("ERROR: expected space after opbit in read_diff!");
+                return 0;
+            }
+            idx++;
+
+            char* endptr;
+            action.line_original = strtol(content + idx, &endptr, 10);
+            if (endptr == content + idx || *endptr != ' ') {
+                perror("ERROR: failed to parse line_original in read_diff!");
+                return 0;
+            }
+            idx = endptr - content + 1;
+
+            action.line_changed = strtol(content + idx, &endptr, 10);
+            if (endptr == content + idx || *endptr != ' ') {
+                perror("ERROR: failed to parse line_changed in read_diff!");
+                return 0;
+            }
+            idx = endptr - content + 1;
+
+            size_t content_length = strtol(content + idx, &endptr, 10);
+            if (endptr == content + idx || *endptr != ' ') {
+                perror("ERROR: failed to parse content length in read_diff!");
+                return 0;
+            }
+            idx = endptr - content + 1;
+
+            action.content = strndup(content + idx, content_length);
+            if (!action.content) {
+                perror("ERROR: failed to allocate memory for action content in read_diff!");
+                return 0;
+            }
+            idx += content_length;
+        } else {
+            perror("ERROR: unknown action type in read_diff!");
+            return 0;
+        }
+
+        add_action(diff_out, action);
+
+        action_idx++;
+    }
+
+    return 1;
+}
+
+int save_file_diff(char* path, char* root, size_t diff_id, char* basefile_hash, Changes* changes) {
+    char basefile_location[2+strlen(root)+strlen("/.merk/objects/")+strlen(basefile_hash)];
+    snprintf(basefile_location, sizeof(basefile_location), "%s/.merk/objects/%.2s/%s", root, basefile_hash, basefile_hash+2);
+
+    size_t compressed_size;
+    unsigned char* compressed_data = (unsigned char*)get_file_content_with_size(basefile_location, &compressed_size);
+    if (!compressed_data) return 0;
+
+    size_t idx = 0;
+
+    while (idx < compressed_size && IS_DIGIT(compressed_data[idx])) {
+        idx++;
+    }
+
+    if (idx == 0) {
+        perror("ERROR: no length found at start of save_file_diff!");
+        free(compressed_data);
+        return 0;
+    }
+
+    char* size_str = calloc(idx + 1, sizeof(char));
+    if (!size_str) {
+        free(compressed_data);
+        return 0;
+    }
+
+    memcpy(size_str, compressed_data, idx);
+    size_str[idx] = '\0';
+
+    char* end;
+    long size = strtol(size_str, &end, 10);
+    if (end == size_str || *end != '\0') {
+        perror("ERROR: invalid length in base_file_list");
+        free(size_str);
+        free(compressed_data);
+        return 0;
+    }
+
+    size_t offset = strlen(size_str) + 1;
+    free(size_str);
+
+    char* basefile_content = calloc(size+1, sizeof(char));
+    if (!basefile_content) {
+        free(compressed_data);
+        return 0;
+    }
+
+    uLongf dest_len = (uLongf)size;
+
+    int result = uncompress((unsigned char*)basefile_content, &dest_len, compressed_data+offset, compressed_size);
+    free(compressed_data);
+
+    if (result != Z_OK) {
+        perror("ERROR: decompression of the base file list failed!");
+        free(basefile_content);
+        return 0;
+    }
+
+    basefile_content[dest_len] = '\0';
+
+    File* basefile = from_string(basefile_content);
+    char* modified_file_path = realpath(path, NULL);
+    File* modified_file = new_file(modified_file_path);
+
+    ActionList* diff = myers_diff(basefile, modified_file, 0, 0);
+    if (diff->len == 0) {
+        free(basefile_content);
+        return 1;
+    }
+
+    
+    for (size_t idx = 0; idx < diff->len; idx++) {
+        Action action = diff->actions[idx];
+        if (action.type == INSERT) {
+            changes->insertions += 1;
+        } else if (action.type == DELETE) {
+            changes->deletions += 1;
+        }
+    }
+
+    save_diff(diff, path, root, diff_id, basefile_hash, modified_file, 0);
+
+    free(basefile_content);
+    return 1;
+}
+
+File* apply_diff(File* basefile, ActionList* diff) {
+    if (!basefile || !diff) return NULL;
+
+    File* copy = copy_file(basefile);
+    if (!copy) return NULL;
+
+    sort_action_list(diff);
+
+    for (size_t i = 0; i < diff->len; i++) {
+        Action* action = &diff->actions[i];
+        int success = 0;
+
+        switch (action->type) {
+            case INSERT:
+                success = insert_line(copy, action->content, action->line_changed);
+                if (!success) {
+                    fprintf(stderr, "ERROR: Failed to insert line at index %zu\n", action->line_changed);
+                    free_file(copy);
+                    return NULL;
+                }
+                break;
+
+            case DELETE:
+                success = delete_line(copy, action->line_original);
+                if (!success) {
+                    fprintf(stderr, "ERROR: Failed to delete line at index %zu\n", action->line_original);
+                    free_file(copy);
+                    return NULL;
+                }
+                break;
+
+            default:
+                fprintf(stderr, "ERROR: Unknown action type %d\n", action->type);
+                free_file(copy);
+                return NULL;
+        }
+    }
+
+    return copy;
 }
\ No newline at end of file
diff --git a/src/utilities.c b/src/utilities.c
index 54dccfd..9bfe709 100644
--- a/src/utilities.c
+++ b/src/utilities.c
@@ -350,48 +350,6 @@ PathType get_path_type(const char* path) {
     return PT_OTHER;
 }
 
-char* get_file_content(char* path) {
-    if (!path) return NULL;
-
-    FILE* file = fopen(path, "rb");
-    if (!file) { perror("ERROR: could not open file in get_file_content!"); return NULL; }
-    if (fseek(file, 0, SEEK_END) != 0) { fclose(file); return NULL; }
-    long file_size = ftell(file);
-    if (file_size < 0) { perror("ERROR: file size is negative in get_file_content!"); fclose(file); return NULL; }
-    if (fseek(file, 0, SEEK_SET) != 0) { fclose(file); return NULL; }
-    size_t n = (size_t)file_size;
-    char* buf = (char*)calloc(n + 1, 1);
-    if (!buf) { fclose(file); return NULL; }
-
-    size_t got = fread(buf, 1, n, file);
-    fclose(file);
-
-    buf[got] = '\0';
-
-    return buf;
-}
-
-char* get_file_content_with_size(char* path, size_t* size) {
-    if (!path || !size) return NULL;
-
-    FILE* file = fopen(path, "rb");
-    if (!file) { perror("ERROR: could not open file in get_file_content_with_size!"); return NULL; }
-    if (fseek(file, 0, SEEK_END) != 0) { fclose(file); return NULL; }
-    long file_size = ftell(file);
-    if (file_size < 0) { perror("ERROR: file size is negative in get_file_content_with_size!"); fclose(file); return NULL; }
-    if (fseek(file, 0, SEEK_SET) != 0) { fclose(file); return NULL; }
-    size_t n = (size_t)file_size;
-
-    char* buf = (char*)malloc(n);
-    if (!buf) { fclose(file); return NULL; }
-
-    size_t got = fread(buf, 1, n, file);
-    fclose(file);
-
-    *size = got;
-    return buf;
-}
-
 // Create directory recursively
 static int mkdir_recursive(const char *path, mode_t mode) {
     char *path_copy = strdup(path);
@@ -448,350 +406,4 @@ int create_default_config_file(char* config_path) {
 
     fclose(fp);
     return 0;
-}
-
-int save_diff(ActionList* diff, char* path, char* root, size_t diff_id, char* basefile_hash, File* modified_file, int tree) {
-    size_t buffer_size = 41;
-
-    buffer_size += 1 + snprintf(NULL, 0, "%d", diff->len);
-
-    for (size_t idx = 0; idx < diff->len; idx++) {
-        Action action = diff->actions[idx];
-        if (action.type == DELETE) {
-            // 4 = OPBIT SPACE ... SPACE ... SPACE
-            buffer_size +=
-                4 +
-                snprintf(NULL, 0, "%d", action.line_original) +
-                snprintf(NULL, 0, "%d", action.line_changed);
-            continue;
-        }
-        // 6 = OPBIT SPACE ... SPACE ... SPACE ... SPACE ... SPACE
-        buffer_size +=
-            6 +
-            snprintf(NULL, 0, "%d", action.line_original) +
-            snprintf(NULL, 0, "%d", action.line_changed) +
-            snprintf(NULL, 0, "%zu", strlen(modified_file->content[action.line_changed])) +
-            strlen(modified_file->content[action.line_changed]);
-    }
-
-    char tmp[buffer_size];
-    size_t offset = 0;
-
-    offset += snprintf(tmp, sizeof(tmp), "%s %zu ", basefile_hash, diff->len);
-
-    for (size_t idx = 0; idx < diff->len; idx++) {
-        Action action = diff->actions[idx];
-        size_t remaining = sizeof(tmp) - offset;
-
-        if (action.type == DELETE) {
-            offset += snprintf(tmp + offset, 
-                remaining, 
-                "0 %zu %zu ", 
-                action.line_original, 
-                action.line_changed
-            );
-            continue;
-        }
-
-        offset += snprintf(tmp + offset, remaining, 
-            "1 %zu %zu %zu %s ", 
-            action.line_original, 
-            action.line_changed, 
-            strlen(modified_file->content[action.line_changed]), 
-            modified_file->content[action.line_changed]
-        );
-    }
-
-    char id[2+snprintf(NULL, 0, "%d", diff_id)+strlen(path)];
-    snprintf(id, sizeof(id), "%s %d", path, diff_id);
-    char hash[41];
-    if (tree) object_hash(TreeDiffObject, id, hash);
-    else object_hash(FileDiffObject, id, hash);
-
-    char dir_path[PATH_MAX];
-    char file_path[PATH_MAX];
-    snprintf(dir_path, sizeof(dir_path), "%s/.merk/objects/%.2s", root, hash);
-    mkdir(dir_path, 0755);
-    snprintf(file_path, sizeof(file_path), "%s/%s", dir_path, hash+2);
-
-    if (access(file_path, F_OK) == 0) {
-        return 1;
-    }
-
-    FILE* fp = fopen(file_path, "wb");
-    if (!fp) {
-        perror("ERROR: cannot open path in save_diff!\n");
-        return 0;
-    }
-
-    // Ensure the directory structure exists
-    if (mkdir_recursive(dir_path, 0755) < 0 && errno != EEXIST) {
-        perror("ERROR: failed to create directory structure in save_diff!");
-        return 0;
-    }
-
-    uLong originalLen = strlen(tmp) + 1;
-    uLong compressedLen = compressBound(originalLen);
-    Bytef* compressed = malloc(compressedLen);
-    if (!compressed) {
-        fclose(fp);
-        return 0;
-    }
-
-    if (compress(compressed, &compressedLen, (const Bytef*)tmp, originalLen) != Z_OK) {
-        perror("ERROR: compression failed in save_diff!");
-        free(compressed);
-        fclose(fp);
-        return 0;
-    }
-
-    fprintf(fp, "%lu ", (unsigned long)originalLen);
-
-    fwrite(compressed, 1, compressedLen, fp);
-
-    fclose(fp);
-
-    chmod(file_path, S_IRUSR | S_IRGRP | S_IROTH);
-
-    return 1;
-}
-
-int read_diff(char* content, char* basefile_hash, ActionList* diff_out) {
-    if (!content || !basefile_hash || !diff_out) {
-        return 0;
-    }
-
-    size_t idx = 0;
-    strncpy(basefile_hash, content, 40);
-    basefile_hash[40] = '\0';
-    idx += 41;
-
-    while (content[idx] && IS_DIGIT(content[idx])) {
-        idx++;
-    }
-
-    if (idx == 41) {
-        perror("ERROR: no length found at start of diff!");
-        return 0;
-    }
-
-    char* number_of_actions = calloc(idx - 41 + 1, sizeof(char));
-    if (!number_of_actions) {
-        return 0;
-    }
-
-    memcpy(number_of_actions, content + 41, idx - 41);
-    number_of_actions[idx - 41] = '\0';
-
-    char* end;
-    long actions = strtol(number_of_actions, &end, 10);
-    free(number_of_actions);
-
-    if (end == number_of_actions || *end != '\0' || actions <= 0) {
-        perror("ERROR: invalid number of actions in read_diff!");
-        return 0;
-    }
-
-    size_t action_idx = 0;
-    while (content[idx] && action_idx < (size_t)actions) {
-        idx++;
-
-        Action action = {0};
-
-        if (content[idx] == '0') {
-            idx++;
-            if (content[idx] != ' ') {
-                perror("ERROR: expected space after opbit in read_diff!");
-                return 0;
-            }
-            idx++;
-
-            char* endptr;
-            action.line_original = strtol(content + idx, &endptr, 10);
-            if (endptr == content + idx || *endptr != ' ') {
-                perror("ERROR: failed to parse line_original in read_diff!");
-                return 0;
-            }
-            idx = endptr - content + 1;
-
-            action.line_changed = strtol(content + idx, &endptr, 10);
-            if (endptr == content + idx || (*endptr != ' ' && *endptr != '\0')) {
-                perror("ERROR: failed to parse line_changed in read_diff!");
-                return 0;
-            }
-            idx = endptr - content;
-        } else if (content[idx] == '1') {
-            idx++;
-            if (content[idx] != ' ') {
-                perror("ERROR: expected space after opbit in read_diff!");
-                return 0;
-            }
-            idx++;
-
-            char* endptr;
-            action.line_original = strtol(content + idx, &endptr, 10);
-            if (endptr == content + idx || *endptr != ' ') {
-                perror("ERROR: failed to parse line_original in read_diff!");
-                return 0;
-            }
-            idx = endptr - content + 1;
-
-            action.line_changed = strtol(content + idx, &endptr, 10);
-            if (endptr == content + idx || *endptr != ' ') {
-                perror("ERROR: failed to parse line_changed in read_diff!");
-                return 0;
-            }
-            idx = endptr - content + 1;
-
-            size_t content_length = strtol(content + idx, &endptr, 10);
-            if (endptr == content + idx || *endptr != ' ') {
-                perror("ERROR: failed to parse content length in read_diff!");
-                return 0;
-            }
-            idx = endptr - content + 1;
-
-            action.content = strndup(content + idx, content_length);
-            if (!action.content) {
-                perror("ERROR: failed to allocate memory for action content in read_diff!");
-                return 0;
-            }
-            idx += content_length;
-        } else {
-            perror("ERROR: unknown action type in read_diff!");
-            return 0;
-        }
-
-        add_action(diff_out, action);
-
-        action_idx++;
-    }
-
-    return 1;
-}
-
-int save_file_diff(char* path, char* root, size_t diff_id, char* basefile_hash, Changes* changes) {
-    char basefile_location[2+strlen(root)+strlen("/.merk/objects/")+strlen(basefile_hash)];
-    snprintf(basefile_location, sizeof(basefile_location), "%s/.merk/objects/%.2s/%s", root, basefile_hash, basefile_hash+2);
-
-    size_t compressed_size;
-    unsigned char* compressed_data = (unsigned char*)get_file_content_with_size(basefile_location, &compressed_size);
-    if (!compressed_data) return 0;
-
-    size_t idx = 0;
-
-    while (idx < compressed_size && IS_DIGIT(compressed_data[idx])) {
-        idx++;
-    }
-
-    if (idx == 0) {
-        perror("ERROR: no length found at start of save_file_diff!");
-        free(compressed_data);
-        return 0;
-    }
-
-    char* size_str = calloc(idx + 1, sizeof(char));
-    if (!size_str) {
-        free(compressed_data);
-        return 0;
-    }
-
-    memcpy(size_str, compressed_data, idx);
-    size_str[idx] = '\0';
-
-    char* end;
-    long size = strtol(size_str, &end, 10);
-    if (end == size_str || *end != '\0') {
-        perror("ERROR: invalid length in base_file_list");
-        free(size_str);
-        free(compressed_data);
-        return 0;
-    }
-
-    size_t offset = strlen(size_str) + 1;
-    free(size_str);
-
-    char* basefile_content = calloc(size+1, sizeof(char));
-    if (!basefile_content) {
-        free(compressed_data);
-        return 0;
-    }
-
-    uLongf dest_len = (uLongf)size;
-
-    int result = uncompress((unsigned char*)basefile_content, &dest_len, compressed_data+offset, compressed_size);
-    free(compressed_data);
-
-    if (result != Z_OK) {
-        perror("ERROR: decompression of the base file list failed!");
-        free(basefile_content);
-        return 0;
-    }
-
-    basefile_content[dest_len] = '\0';
-
-    File* basefile = from_string(basefile_content);
-    char* modified_file_path = realpath(path, NULL);
-    File* modified_file = new_file(modified_file_path);
-
-    ActionList* diff = myers_diff(basefile, modified_file, 0, 0);
-    if (diff->len == 0) {
-        free(basefile_content);
-        return 1;
-    }
-
-    
-    for (size_t idx = 0; idx < diff->len; idx++) {
-        Action action = diff->actions[idx];
-        if (action.type == INSERT) {
-            changes->insertions += 1;
-        } else if (action.type == DELETE) {
-            changes->deletions += 1;
-        }
-    }
-
-    save_diff(diff, path, root, diff_id, basefile_hash, modified_file, 0);
-
-    free(basefile_content);
-    return 1;
-}
-
-File* apply_diff(File* basefile, ActionList* diff) {
-    if (!basefile || !diff) return NULL;
-
-    File* copy = copy_file(basefile);
-    if (!copy) return NULL;
-
-    sort_action_list(diff);
-
-    for (size_t i = 0; i < diff->len; i++) {
-        Action* action = &diff->actions[i];
-        int success = 0;
-
-        switch (action->type) {
-            case INSERT:
-                success = insert_line(copy, action->content, action->line_changed);
-                if (!success) {
-                    fprintf(stderr, "ERROR: Failed to insert line at index %zu\n", action->line_changed);
-                    free_file(copy);
-                    return NULL;
-                }
-                break;
-
-            case DELETE:
-                success = delete_line(copy, action->line_original);
-                if (!success) {
-                    fprintf(stderr, "ERROR: Failed to delete line at index %zu\n", action->line_original);
-                    free_file(copy);
-                    return NULL;
-                }
-                break;
-
-            default:
-                fprintf(stderr, "ERROR: Unknown action type %d\n", action->type);
-                free_file(copy);
-                return NULL;
-        }
-    }
-
-    return copy;
 }
\ No newline at end of file