Files
probo/pkg/cli/api/pagination.go
Bryan Frimin 6919b9372a Add proboctl core skeleton and build system
Introduce the proboctl CLI entry point, root command, version,
completion, iostreams, shared cmdutil helpers (flags, table, JSON,
time formatting), API client with pagination, config management,
goreleaser configuration, and build system integration.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>
2026-03-16 15:41:47 +01:00

87 lines
2.1 KiB
Go

// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
package api
import (
"encoding/json"
"fmt"
"maps"
)
type (
PageInfo struct {
HasNextPage bool `json:"hasNextPage"`
EndCursor *string `json:"endCursor"`
}
Edge[T any] struct {
Node T `json:"node"`
}
Connection[T any] struct {
TotalCount int `json:"totalCount"`
Edges []Edge[T] `json:"edges"`
PageInfo PageInfo `json:"pageInfo"`
}
)
// Paginate fetches all pages of a connection up to limit items. The extract
// function pulls the Connection out of the raw GraphQL response data.
func Paginate[T any](
client *Client,
query string,
variables map[string]any,
limit int,
extract func(json.RawMessage) (*Connection[T], error),
) ([]T, int, error) {
vars := maps.Clone(variables)
var (
nodes = make([]T, 0)
totalCount int
)
for {
remaining := limit - len(nodes)
if remaining <= 0 {
break
}
vars["first"] = remaining
data, err := client.Do(query, vars)
if err != nil {
return nil, 0, err
}
conn, err := extract(data)
if err != nil {
return nil, 0, fmt.Errorf("cannot parse response: %w", err)
}
totalCount = conn.TotalCount
for _, edge := range conn.Edges {
nodes = append(nodes, edge.Node)
}
if !conn.PageInfo.HasNextPage || conn.PageInfo.EndCursor == nil {
break
}
vars["after"] = *conn.PageInfo.EndCursor
}
return nodes, totalCount, nil
}