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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,131 @@ | ||
| // Copyright Valkey GLIDE Project Contributors - SPDX Identifier: Apache-2.0 | ||
|
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| package options | ||
|
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| import ( | ||
| "github.com/valkey-io/valkey-glide/go/glide/utils" | ||
| ) | ||
|
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| const ( | ||
| // LIMIT subcommand string to include in the SORT and SORT_RO commands. | ||
| LIMIT_COMMAND_STRING = "LIMIT" | ||
| // ALPHA subcommand string to include in the SORT and SORT_RO commands. | ||
| ALPHA_COMMAND_STRING = "ALPHA" | ||
| // BY subcommand string to include in the SORT and SORT_RO commands. | ||
| // Supported in cluster mode since Valkey version 8.0 and above. | ||
| BY_COMMAND_STRING = "BY" | ||
| // GET subcommand string to include in the SORT and SORT_RO commands. | ||
| GET_COMMAND_STRING = "GET" | ||
| ) | ||
|
|
||
| // SortLimit struct represents the range of elements to retrieve | ||
| // The LIMIT argument is commonly used to specify a subset of results from the matching elements, similar to the | ||
| // LIMIT clause in SQL (e.g., `SELECT LIMIT offset, count`). | ||
| type SortLimit struct { | ||
| Offset int64 | ||
| Count int64 | ||
| } | ||
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| // OrderBy specifies the order to sort the elements. Can be ASC (ascending) or DESC(descending). | ||
| type OrderBy string | ||
|
|
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| const ( | ||
| ASC OrderBy = "ASC" | ||
| DESC OrderBy = "DESC" | ||
| ) | ||
|
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| // SortOptions struct combines both the base options and additional sorting options | ||
| type SortOptions struct { | ||
| SortLimit *SortLimit | ||
| OrderBy OrderBy | ||
| IsAlpha bool | ||
| ByPattern string | ||
| GetPatterns []string | ||
| } | ||
|
|
||
| func NewSortOptions() *SortOptions { | ||
| return &SortOptions{ | ||
| OrderBy: ASC, // Default order is ascending | ||
| IsAlpha: false, // Default is numeric sorting | ||
| } | ||
| } | ||
|
|
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| // SortLimit Limits the range of elements | ||
| // Offset is the starting position of the range, zero based. | ||
| // Count is the maximum number of elements to include in the range. | ||
| // A negative count returns all elements from the offset. | ||
| func (opts *SortOptions) SetSortLimit(offset, count int64) *SortOptions { | ||
| opts.SortLimit = &SortLimit{Offset: offset, Count: count} | ||
| return opts | ||
| } | ||
|
|
||
| // OrderBy sets the order to sort by (ASC or DESC) | ||
| func (opts *SortOptions) SetOrderBy(order OrderBy) *SortOptions { | ||
| opts.OrderBy = order | ||
| return opts | ||
| } | ||
|
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||
| // IsAlpha determines whether to sort lexicographically (true) or numerically (false) | ||
| func (opts *SortOptions) SetIsAlpha(isAlpha bool) *SortOptions { | ||
| opts.IsAlpha = isAlpha | ||
| return opts | ||
| } | ||
|
|
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| // ByPattern - a pattern to sort by external keys instead of by the elements stored at the key themselves. The | ||
| // pattern should contain an asterisk (*) as a placeholder for the element values, where the value | ||
| // from the key replaces the asterisk to create the key name. For example, if key | ||
| // contains IDs of objects, byPattern can be used to sort these IDs based on an | ||
| // attribute of the objects, like their weights or timestamps. | ||
| // Supported in cluster mode since Valkey version 8.0 and above. | ||
| func (opts *SortOptions) SetByPattern(byPattern string) *SortOptions { | ||
| opts.ByPattern = byPattern | ||
| return opts | ||
| } | ||
|
|
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| // A pattern used to retrieve external keys' values, instead of the elements at key. | ||
| // The pattern should contain an asterisk (*) as a placeholder for the element values, where the | ||
| // value from key replaces the asterisk to create the key name. This | ||
| // allows the sorted elements to be transformed based on the related keys values. For example, if | ||
| // key< contains IDs of users, getPatterns can be used to retrieve | ||
| // specific attributes of these users, such as their names or email addresses. E.g., if | ||
| // getPatterns is name_*, the command will return the values of the keys | ||
| // name_<element> for each sorted element. Multiple getPatterns | ||
| // arguments can be provided to retrieve multiple attributes. The special value # can | ||
| // be used to include the actual element from key being sorted. If not provided, only | ||
| // the sorted elements themselves are returned. | ||
| // Supported in cluster mode since Valkey version 8.0 and above. | ||
| func (opts *SortOptions) AddGetPattern(getPattern string) *SortOptions { | ||
| opts.GetPatterns = append(opts.GetPatterns, getPattern) | ||
| return opts | ||
| } | ||
|
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| // ToArgs creates the arguments to be used in SORT and SORT_RO commands. | ||
| func (opts *SortOptions) ToArgs() []string { | ||
| var args []string | ||
|
|
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| if opts.SortLimit != nil { | ||
| args = append( | ||
| args, | ||
| LIMIT_COMMAND_STRING, | ||
| utils.IntToString(opts.SortLimit.Offset), | ||
| utils.IntToString(opts.SortLimit.Count), | ||
| ) | ||
| } | ||
|
|
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| if opts.OrderBy != "" { | ||
| args = append(args, string(opts.OrderBy)) | ||
| } | ||
|
|
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| if opts.IsAlpha { | ||
| args = append(args, ALPHA_COMMAND_STRING) | ||
| } | ||
|
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| if opts.ByPattern != "" { | ||
| args = append(args, BY_COMMAND_STRING, opts.ByPattern) | ||
| } | ||
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| for _, getPattern := range opts.GetPatterns { | ||
| args = append(args, GET_COMMAND_STRING, getPattern) | ||
| } | ||
| return args | ||
| } |
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