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Go: Implementing List commands (valkey-io#2370)
* Go: Implementing List commands Signed-off-by: Janhavi Gupta <[email protected]>
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| // Copyright Valkey GLIDE Project Contributors - SPDX Identifier: Apache-2.0 | ||
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| package api | ||
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| // Supports commands and transactions for the "List Commands" group for standalone and cluster clients. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/?group=list | ||
| type ListCommands interface { | ||
| // Inserts all the specified values at the head of the list stored at key. elements are inserted one after the other to the | ||
| // head of the list, from the leftmost element to the rightmost element. If key does not exist, it is created as an empty | ||
| // list before performing the push operation. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // Parameters: | ||
| // key - The key of the list. | ||
| // elements - The elements to insert at the head of the list stored at key. | ||
| // | ||
| // Return value: | ||
| // A api.Result[int64] containing the length of the list after the push operation. | ||
| // | ||
| // For example: | ||
| // result, err := client.LPush("my_list", []string{"value1", "value2"}) | ||
| // result.Value(): 2 | ||
| // result.IsNil(): false | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/lpush/ | ||
| LPush(key string, elements []string) (Result[int64], error) | ||
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| // Removes and returns the first elements of the list stored at key. The command pops a single element from the beginning | ||
| // of the list. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // Parameters: | ||
| // key - The key of the list. | ||
| // | ||
| // Return value: | ||
| // The Result[string] containing the value of the first element. | ||
| // If key does not exist, [api.CreateNilStringResult()] will be returned. | ||
| // | ||
| // For example: | ||
| // 1. result, err := client.LPush("my_list", []string{"value1", "value2"}) | ||
| // value, err := client.LPop("my_list") | ||
| // value.Value(): "value2" | ||
| // result.IsNil(): false | ||
| // 2. result, err := client.LPop("non_existent") | ||
| // result.Value(): "" | ||
| // result.IsNil(); true | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/lpop/ | ||
| LPop(key string) (Result[string], error) | ||
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| // Removes and returns up to count elements of the list stored at key, depending on the list's length. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // Parameters: | ||
| // key - The key of the list. | ||
| // count - The count of the elements to pop from the list. | ||
| // | ||
| // Return value: | ||
| // An array of the popped elements as Result[string] will be returned depending on the list's length | ||
| // If key does not exist, nil will be returned. | ||
| // | ||
| // For example: | ||
| // 1. result, err := client.LPopCount("my_list", 2) | ||
| // result: []api.Result[string]{api.CreateStringResult("value1"), api.CreateStringResult("value2")} | ||
| // 2. result, err := client.LPopCount("non_existent") | ||
| // result: nil | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/lpop/ | ||
| LPopCount(key string, count int64) ([]Result[string], error) | ||
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| // Returns the index of the first occurrence of element inside the list specified by key. If no match is found, | ||
| // [api.CreateNilInt64Result()] is returned. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // Parameters: | ||
| // key - The name of the list. | ||
| // element - The value to search for within the list. | ||
| // | ||
| // Return value: | ||
| // The Result[int64] containing the index of the first occurrence of element, or [api.CreateNilInt64Result()] if element is | ||
| // not in the list. | ||
| // | ||
| // For example: | ||
| // result, err := client.RPush("my_list", []string{"a", "b", "c", "d", "e", "e"}) | ||
| // position, err := client.LPos("my_list", "e") | ||
| // position.Value(): 4 | ||
| // position.IsNil(): false | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/lpos/ | ||
| LPos(key string, element string) (Result[int64], error) | ||
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| // Returns the index of an occurrence of element within a list based on the given options. If no match is found, | ||
| // [api.CreateNilInt64Result()] is returned. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // Parameters: | ||
| // key - The name of the list. | ||
| // element - The value to search for within the list. | ||
| // options - The LPos options. | ||
| // | ||
| // Return value: | ||
| // The Result[int64] containing the index of element, or [api.CreateNilInt64Result()] if element is not in the list. | ||
| // | ||
| // For example: | ||
| // 1. result, err := client.RPush("my_list", []string{"a", "b", "c", "d", "e", "e"}) | ||
| // result, err := client.LPosWithOptions("my_list", "e", api.NewLPosOptionsBuilder().SetRank(2)) | ||
| // result.Value(): 5 (Returns the second occurrence of the element "e") | ||
| // 2. result, err := client.RPush("my_list", []string{"a", "b", "c", "d", "e", "e"}) | ||
| // result, err := client.LPosWithOptions("my_list", "e", api.NewLPosOptionsBuilder().SetRank(1).SetMaxLen(1000)) | ||
| // result.Value(): 4 | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/lpos/ | ||
| LPosWithOptions(key string, element string, options *LPosOptions) (Result[int64], error) | ||
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| // Returns an array of indices of matching elements within a list. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // Parameters: | ||
| // key - The name of the list. | ||
| // element - The value to search for within the list. | ||
| // count - The number of matches wanted. | ||
| // | ||
| // Return value: | ||
| // An array that holds the indices of the matching elements within the list. | ||
| // | ||
| // For example: | ||
| // result, err := client.RPush("my_list", []string{"a", "b", "c", "d", "e", "e", "e"}) | ||
| // result, err := client.LPosCount("my_list", "e", int64(3)) | ||
| // result: []api.Result[int64]{api.CreateInt64Result(4), api.CreateInt64Result(5), api.CreateInt64Result(6)} | ||
| // | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/lpos/ | ||
| LPosCount(key string, element string, count int64) ([]Result[int64], error) | ||
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| // Returns an array of indices of matching elements within a list based on the given options. If no match is found, an | ||
| // empty array is returned. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // Parameters: | ||
| // key - The name of the list. | ||
| // element - The value to search for within the list. | ||
| // count - The number of matches wanted. | ||
| // options - The LPos options. | ||
| // | ||
| // Return value: | ||
| // An array that holds the indices of the matching elements within the list. | ||
| // | ||
| // For example: | ||
| // 1. result, err := client.RPush("my_list", []string{"a", "b", "c", "d", "e", "e", "e"}) | ||
| // result, err := client.LPosWithOptions("my_list", "e", int64(1), api.NewLPosOptionsBuilder().SetRank(2)) | ||
| // result: []api.Result[int64]{api.CreateInt64Result(5)} | ||
| // 2. result, err := client.RPush("my_list", []string{"a", "b", "c", "d", "e", "e", "e"}) | ||
| // result, err := client.LPosWithOptions( | ||
| // "my_list", | ||
| // "e", | ||
| // int64(3), | ||
| // api.NewLPosOptionsBuilder().SetRank(2).SetMaxLen(1000), | ||
| // ) | ||
| // result: []api.Result[int64]{api.CreateInt64Result(5), api.CreateInt64Result(6)} | ||
| // | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/lpos/ | ||
| LPosCountWithOptions(key string, element string, count int64, options *LPosOptions) ([]Result[int64], error) | ||
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| // Inserts all the specified values at the tail of the list stored at key. | ||
| // elements are inserted one after the other to the tail of the list, from the leftmost element to the rightmost element. | ||
| // If key does not exist, it is created as an empty list before performing the push operation. | ||
| // | ||
| // See [valkey.io] for details. | ||
| // | ||
| // Parameters: | ||
| // key - The key of the list. | ||
| // elements - The elements to insert at the tail of the list stored at key. | ||
| // | ||
| // Return value: | ||
| // The Result[int64] containing the length of the list after the push operation. | ||
| // | ||
| // For example: | ||
| // result, err := client.RPush("my_list", []string{"a", "b", "c", "d", "e", "e", "e"}) | ||
| // result.Value(): 7 | ||
| // result.IsNil(): false | ||
| // | ||
| // [valkey.io]: https://valkey.io/commands/rpush/ | ||
| RPush(key string, elements []string) (Result[int64], error) | ||
| } |
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