minecraft - errors.go

     1  package minecraft
     2  
     3  import (
     4  	"errors"
     5  	"strconv"
     6  
     7  	"vimagination.zapto.org/minecraft/nbt"
     8  )
     9  
    10  var (
    11  	// ErrOOB is an error returned when sanity checking section data
    12  	ErrOOB = errors.New("received out-of-bounds error")
    13  	// ErrNoLock is an error returns by path types to indicate that the lock on the
    14  	// minecraft level has been locked and needs reinstating to continue
    15  	ErrNoLock = errors.New("lost lock on files")
    16  )
    17  
    18  // MissingTagError is an error type returned when an expected tag is not found
    19  type MissingTagError struct {
    20  	TagName string
    21  }
    22  
    23  func (m MissingTagError) Error() string {
    24  	return "minecraft: missing " + strconv.Quote(m.TagName) + " tag"
    25  }
    26  
    27  // WrongTypeError is an error returned when a nbt tag has an unexpected type
    28  type WrongTypeError struct {
    29  	TagName        string
    30  	Expecting, Got nbt.TagID
    31  }
    32  
    33  func (w WrongTypeError) Error() string {
    34  	return "minecraft: tag " + strconv.Quote(w.TagName) + " is of incorrect type, expecting " + strconv.Quote(w.Expecting.String()) + ", got " + strconv.Quote(w.Got.String())
    35  }
    36  
    37  // UnexpectedValue is an error returned from chunk loading during sanity
    38  // checking
    39  type UnexpectedValue struct {
    40  	TagName, Expecting, Got string
    41  }
    42  
    43  func (u UnexpectedValue) Error() string {
    44  	return "minecraft: tag " + strconv.Quote(u.TagName) + " was expecting " + strconv.Quote(u.Expecting) + ", but got " + strconv.Quote(u.Got)
    45  }
    46  
    47  // UnknownCompression is an error returned by path types when it encounters a
    48  // compression scheme it is not prepared to handle or an unkown compression
    49  // scheme
    50  type UnknownCompression struct {
    51  	Code byte
    52  }
    53  
    54  func (u UnknownCompression) Error() string {
    55  	return "unknown compression code: " + strconv.FormatUint(uint64(u.Code), 10)
    56  }
    57  
    58  // ConflictError is an error return by SetChunk when trying to save a single
    59  // chunk multiple times during the same save operation
    60  type ConflictError struct {
    61  	X, Z int32
    62  }
    63  
    64  func (c ConflictError) Error() string {
    65  	return "already setting chunk " + strconv.FormatInt(int64(c.X), 10) + "," + strconv.FormatInt(int64(c.Z), 10) + ", recall SetChunk to set again"
    66  }
    67  
    68  // FilePathSetError is an error returned from SetChunk when some error is
    69  // returned either from converting the nbt or saving it
    70  type FilePathSetError struct {
    71  	X, Z int32
    72  	Err  error
    73  }
    74  
    75  func (f FilePathSetError) Error() string {
    76  	return "chunk " + strconv.FormatInt(int64(f.X), 10) + "," + strconv.FormatInt(int64(f.Z), 10) + " had the following error: " + f.Err.Error()
    77  }
    78  
    79  // MultiError is an error type that contains multiple errors
    80  type MultiError struct {
    81  	Errors []error
    82  }
    83  
    84  func (m MultiError) Error() string {
    85  	if len(m.Errors) == 1 {
    86  		return m.Errors[0].Error()
    87  	}
    88  	return "received " + strconv.FormatInt(int64(len(m.Errors)), 10) + " errors"
    89  }
    90