Feature/file storage

[tom6311tom6311]

Brief

• Implement username and db level file storage features

Features:

1. Design storage directory hierarchy. Example here
2. Map storage hierarchy to Rust structs, Including:
   • Mapping to .json files: UsernamesJson, DbsJson, TablesJson
   • Mapping to elements inside json files: UsernameInfo, DbInfo, TableInfo
3. Functions for username-level operations:
   • File::create_username, File::get_usernames, File::remove_username
4. Functions for db-level operations:
   • File::create_db, File::get_dbs, File::remove_db
5. Design test cases for each member functions of File
6. Specify Input / Output spec of TODO functions
   • File::create_table, File::load_tables, File::append_rows, File::fetch_rows, File::delete_rows, File::modify_row

[todo[bot]]

create_table(username: &str, db_name: &str, table: &TableInfo, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/3dd1f9799c439242ee6b8e590fc4f2df23712043/src/storage/file.rs#L367-L372

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This comment was generated by todo based on a TODO comment in 3dd1f9799c439242ee6b8e590fc4f2df23712043 in #2. cc @tom6311tom6311.

[todo[bot]]

load_tables(username: &str, db_name: &str, file_base_path: Option<&str>) -> Result<Vec<TableInfo>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/3dd1f9799c439242ee6b8e590fc4f2df23712043/src/storage/file.rs#L369-L374

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This comment was generated by todo based on a TODO comment in 3dd1f9799c439242ee6b8e590fc4f2df23712043 in #2. cc @tom6311tom6311.

[todo[bot]]

append_rows(username: &str, db_name: &str, table_name: &str, rows: &Vec<Row>, file_base_path: Option<&str>) -> Result<Vec<u32>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/3dd1f9799c439242ee6b8e590fc4f2df23712043/src/storage/file.rs#L371-L376

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This comment was generated by todo based on a TODO comment in 3dd1f9799c439242ee6b8e590fc4f2df23712043 in #2. cc @tom6311tom6311.

[todo[bot]]

fetch_rows(username: &str, db_name: &str, table_name: &str, row_id_range: &Vec<u32>, file_base_path: Option<&str>) -> Result<Vec<Row>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/3dd1f9799c439242ee6b8e590fc4f2df23712043/src/storage/file.rs#L373-L378

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This comment was generated by todo based on a TODO comment in 3dd1f9799c439242ee6b8e590fc4f2df23712043 in #2. cc @tom6311tom6311.

[todo[bot]]

delete_rows(username: &str, db_name: &str, table_name: &str, row_id_range: &Vec<u32>, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/3dd1f9799c439242ee6b8e590fc4f2df23712043/src/storage/file.rs#L375-L380

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This comment was generated by todo based on a TODO comment in 3dd1f9799c439242ee6b8e590fc4f2df23712043 in #2. cc @tom6311tom6311.

[todo[bot]]

modify_row(username: &str, db_name: &str, table_name: &str, row_id: u32, new_row: &Row, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/3dd1f9799c439242ee6b8e590fc4f2df23712043/src/storage/file.rs#L377-L382

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This comment was generated by todo based on a TODO comment in 3dd1f9799c439242ee6b8e590fc4f2df23712043 in #2. cc @tom6311tom6311.

[todo[bot]]

create_table(username: &str, db_name: &str, table: &TableInfo, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7/src/storage/file.rs#L358-L363

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This comment was generated by todo based on a TODO comment in bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7 in #2. cc @tom6311tom6311.

[todo[bot]]

load_tables(username: &str, db_name: &str, file_base_path: Option<&str>) -> Result<Vec<TableInfo>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7/src/storage/file.rs#L360-L365

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This comment was generated by todo based on a TODO comment in bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7 in #2. cc @tom6311tom6311.

[todo[bot]]

append_rows(username: &str, db_name: &str, table_name: &str, rows: &Vec<Row>, file_base_path: Option<&str>) -> Result<Vec<u32>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7/src/storage/file.rs#L362-L367

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This comment was generated by todo based on a TODO comment in bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7 in #2. cc @tom6311tom6311.

[todo[bot]]

fetch_rows(username: &str, db_name: &str, table_name: &str, row_id_range: &Vec<u32>, file_base_path: Option<&str>) -> Result<Vec<Row>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7/src/storage/file.rs#L364-L369

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This comment was generated by todo based on a TODO comment in bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7 in #2. cc @tom6311tom6311.

[todo[bot]]

delete_rows(username: &str, db_name: &str, table_name: &str, row_id_range: &Vec<u32>, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7/src/storage/file.rs#L366-L371

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This comment was generated by todo based on a TODO comment in bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7 in #2. cc @tom6311tom6311.

[todo[bot]]

modify_row(username: &str, db_name: &str, table_name: &str, row_id: u32, new_row: &Row, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7/src/storage/file.rs#L368-L373

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This comment was generated by todo based on a TODO comment in bb4cc790f9e84eb9d52b98da110c4e9f20c9bdb7 in #2. cc @tom6311tom6311.

[todo[bot]]

create_table(username: &str, db_name: &str, table: &TableInfo, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/0ca59a110dc62d2d7e10e590a2720353c93513d4/src/storage/file.rs#L357-L362

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This comment was generated by todo based on a TODO comment in 0ca59a110dc62d2d7e10e590a2720353c93513d4 in #2. cc @tom6311tom6311.

[todo[bot]]

load_tables(username: &str, db_name: &str, file_base_path: Option<&str>) -> Result<Vec<TableInfo>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/0ca59a110dc62d2d7e10e590a2720353c93513d4/src/storage/file.rs#L359-L364

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This comment was generated by todo based on a TODO comment in 0ca59a110dc62d2d7e10e590a2720353c93513d4 in #2. cc @tom6311tom6311.

[todo[bot]]

append_rows(username: &str, db_name: &str, table_name: &str, rows: &Vec<Row>, file_base_path: Option<&str>) -> Result<Vec<u32>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/0ca59a110dc62d2d7e10e590a2720353c93513d4/src/storage/file.rs#L361-L366

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This comment was generated by todo based on a TODO comment in 0ca59a110dc62d2d7e10e590a2720353c93513d4 in #2. cc @tom6311tom6311.

[todo[bot]]

fetch_rows(username: &str, db_name: &str, table_name: &str, row_id_range: &Vec<u32>, file_base_path: Option<&str>) -> Result<Vec<Row>, FileError>

https://github.com/tigercosmos/StellarSQL/blob/0ca59a110dc62d2d7e10e590a2720353c93513d4/src/storage/file.rs#L363-L368

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This comment was generated by todo based on a TODO comment in 0ca59a110dc62d2d7e10e590a2720353c93513d4 in #2. cc @tom6311tom6311.

[todo[bot]]

delete_rows(username: &str, db_name: &str, table_name: &str, row_id_range: &Vec<u32>, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/0ca59a110dc62d2d7e10e590a2720353c93513d4/src/storage/file.rs#L365-L370

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This comment was generated by todo based on a TODO comment in 0ca59a110dc62d2d7e10e590a2720353c93513d4 in #2. cc @tom6311tom6311.

[todo[bot]]

modify_row(username: &str, db_name: &str, table_name: &str, row_id: u32, new_row: &Row, file_base_path: Option<&str>) -> Result<(), FileError>

https://github.com/tigercosmos/StellarSQL/blob/0ca59a110dc62d2d7e10e590a2720353c93513d4/src/storage/file.rs#L367-L372

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This comment was generated by todo based on a TODO comment in 0ca59a110dc62d2d7e10e590a2720353c93513d4 in #2. cc @tom6311tom6311.