4c57d201a4
The source headers, LICENSE files, and license metadata had drifted apart. Align the entire project to MIT: - Convert every source-file header to the MIT text across all comment styles (Go, TS, TSX, JS, MJS, SQL, CSS, GraphQL, shell), including SPDX-License-Identifier tags - Set the root and cookie-banner LICENSE files to the MIT text with a "MIT License" title line - Switch the package.json license fields, Docker image label, and cookie-banner README to MIT - Update docs and the genmodels header generator accordingly - Normalize copyright lines to a single format (Copyright (c) <year(s)> Probo Inc <hello@probo.com>.): unify the hello@getprobo.com and hello@probo.inc emails to hello@probo.com and the comma-separated years to a hyphenated range Genuine third-party references are intentionally left untouched: the Lucide icon attributions (Lucide is ISC) and the trivy dependency license allowlist. Signed-off-by: Sacha Al Himdani <sacha@probo.com>
83 lines
2.7 KiB
Go
83 lines
2.7 KiB
Go
// Copyright (c) 2025-2026 Probo Inc <hello@probo.com>.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package page
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import (
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"context"
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"fmt"
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)
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// MaxLoadAllPages caps how many pages LoadAll walks, bounding a single
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// call to MaxLoadAllPages*MaxCursorSize rows. Past that, LoadAll errors
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// rather than materialising an unbounded set.
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const MaxLoadAllPages = 20
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// Loader runs one paginated query for the given cursor and returns the
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// rows it loaded. Callers bind the connection, scope, parent key and
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// filter in a closure, exposing only ctx and cursor (typically a coredata
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// LoadBy* on a fresh receiver).
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type Loader[T Paginable[U], U OrderField] func(ctx context.Context, cursor *Cursor[U]) ([]T, error)
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// LoadAll walks every matching row via keyset pagination, advancing a
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// MaxCursorSize forward cursor until no rows remain, and returns them
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// concatenated. fetch runs the paginated query for the cursor. It errors
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// past MaxLoadAllPages pages.
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func LoadAll[T Paginable[U], U OrderField](
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ctx context.Context,
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orderBy OrderBy[U],
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fetch Loader[T, U],
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) ([]T, error) {
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var (
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all []T
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key *CursorKey
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)
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for page := 0; ; page++ {
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if page >= MaxLoadAllPages {
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return nil, fmt.Errorf(
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"cannot load all rows: result set exceeds %d rows (%d pages of %d)",
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MaxLoadAllPages*MaxCursorSize,
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MaxLoadAllPages,
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MaxCursorSize,
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)
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}
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cursor := NewCursor(MaxCursorSize, key, Head, orderBy)
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rows, err := fetch(ctx, cursor)
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if err != nil {
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return nil, fmt.Errorf("cannot load all rows: %w", err)
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}
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p := NewPage(rows, cursor)
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all = append(all, p.Data...)
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if !p.Info.HasNext {
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break
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}
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k := p.Last().CursorKey(orderBy.Field)
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key = &k
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}
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return all, nil
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}
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