69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
package controllers
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import (
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"encoding/json"
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"fmt"
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"nearle/models"
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"github.com/gofiber/fiber/v2"
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)
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// parseStockRequests reads either one request or a list of them.
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//
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// Sniffing the first byte rather than trying one shape and falling back to the
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// other: BodyParser consumes what it reads, so a failed first attempt can leave
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// nothing for the second. The body is JSON here and `[` is unambiguous.
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func parseStockRequests(c *fiber.Ctx) ([]models.StockRequest, error) {
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body := c.Body()
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for _, b := range body {
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switch b {
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case ' ', '\t', '\r', '\n':
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continue
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case '[':
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var many []models.StockRequest
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if err := json.Unmarshal(body, &many); err != nil {
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return nil, err
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}
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return many, nil
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}
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break
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}
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var one models.StockRequest
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if err := c.BodyParser(&one); err != nil {
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return nil, err
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}
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return []models.StockRequest{one}, nil
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}
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// dedupeIDs drops repeats and anything non-positive, preserving order.
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//
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// Repeats matter here rather than being tidiness: approving adds stock, so the
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// same id twice in one batch would try to receive the same delivery twice. The
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// service has its own guard, but a batch should not be relying on it.
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func dedupeIDs(ids []int) []int {
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seen := make(map[int]bool, len(ids))
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out := make([]int, 0, len(ids))
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for _, id := range ids {
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if id <= 0 || seen[id] {
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continue
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}
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seen[id] = true
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out = append(out, id)
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}
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return out
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}
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// stockBatchMessage says what happened in words a merchant can act on.
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//
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// "8 approved, 2 could not be" beats "Success" when two of ten did not land —
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// the whole point of reporting per row is that the person can go and look.
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func stockBatchMessage(ok, failed int, verb string) string {
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if failed == 0 {
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return fmt.Sprintf("%d %s", ok, verb)
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}
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return fmt.Sprintf("%d %s, %d could not be", ok, verb, failed)
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}
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