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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package db | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "os" | ||
| "path/filepath" | ||
| ) | ||
|
|
||
| type ChatInfo struct { | ||
| ChatID int64 | ||
| } | ||
|
|
||
| type DB struct { | ||
| path string | ||
| chatsIDs map[int64]ChatInfo | ||
| } | ||
|
|
||
| // NewDB open and load db if exist, or create new one if not exist | ||
| func NewDB(path string) (DB, error) { | ||
| if err := os.MkdirAll(path, 0777); err != nil { | ||
| return DB{}, err | ||
| } | ||
|
|
||
| chatsIDs := make(map[int64]ChatInfo) | ||
| path = filepath.Join(path, "db.json") | ||
|
|
||
| data, err := os.ReadFile(path) | ||
| if os.IsNotExist(err) || len(data) == 0 { | ||
| return DB{ | ||
| path: path, | ||
| chatsIDs: chatsIDs, | ||
| }, nil | ||
| } | ||
| if err != nil { | ||
| return DB{}, err | ||
| } | ||
|
|
||
| if err := json.Unmarshal(data, &chatsIDs); err != nil { | ||
| return DB{}, err | ||
| } | ||
|
|
||
| return DB{ | ||
| path: path, | ||
| chatsIDs: chatsIDs, | ||
| }, nil | ||
| } | ||
|
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||
| func (db *DB) Save() error { | ||
| file, err := json.MarshalIndent(db.chatsIDs, "", " ") | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| err = os.WriteFile(db.path, file, 0777) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (db *DB) Get(key int64) ChatInfo { | ||
| val, ok := db.chatsIDs[key] | ||
| if !ok { | ||
| return ChatInfo{} | ||
| } | ||
| return val | ||
| } | ||
|
|
||
| func (db *DB) Update(key int64, value ChatInfo) { | ||
| db.chatsIDs[key] = value | ||
| } | ||
|
|
||
| func (db *DB) Delete(key int64) { | ||
| delete(db.chatsIDs, key) | ||
| } | ||
|
|
||
| func (db *DB) List() []ChatInfo { | ||
| chatsInfo := make([]ChatInfo, 0, len(db.chatsIDs)) | ||
| for _, val := range db.chatsIDs { | ||
| chatsInfo = append(chatsInfo, val) | ||
| } | ||
| return chatsInfo | ||
| } |