709b3363c5
This commit overhauls the pagination system to support flexible ordering beyond the default created_at timestamp: - Change CursorKey from fixed byte array to structured object with ID and Value - Add OrderField and OrderDirection types to support different sorting options - Update SQLFragment to dynamically generate SQL based on field and direction - Modify cursor navigation logic to consider custom ordering - Simplify Position type to use string constants instead of numeric values - Update Page struct to include reference to Cursor These changes allow paginated queries to be ordered by different fields (created_at, updated_at, name) in either ascending or descending order while maintaining consistent cursor-based pagination behavior. Signed-off-by: gearnode <bryan@frimin.fr>
72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package page
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import (
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"fmt"
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)
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type (
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OrderField interface {
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Column() string
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}
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BaseOrderField string
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)
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const (
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OrderFieldCreatedAt BaseOrderField = "CREATED_AT"
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OrderFieldUpdatedAt BaseOrderField = "UPDATED_AT"
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OrderFieldName BaseOrderField = "NAME"
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)
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func (of BaseOrderField) String() string {
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return string(of)
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}
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func (of BaseOrderField) Column() string {
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switch of {
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case OrderFieldCreatedAt:
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return "created_at"
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case OrderFieldUpdatedAt:
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return "updated_at"
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case OrderFieldName:
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return "name"
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default:
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return ""
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}
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}
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func (of BaseOrderField) MarshalText() ([]byte, error) {
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return []byte(of.String()), nil
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}
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func (of *BaseOrderField) UnmarshalText(data []byte) error {
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val := string(data)
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switch val {
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case OrderFieldCreatedAt.String():
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*of = OrderFieldCreatedAt
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case OrderFieldUpdatedAt.String():
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*of = OrderFieldUpdatedAt
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case OrderFieldName.String():
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*of = OrderFieldName
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default:
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return fmt.Errorf("invalid BaseOrderField value: %q", val)
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}
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return nil
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}
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