111 lines
3.4 KiB
Go
111 lines
3.4 KiB
Go
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package marketing
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import (
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"fmt"
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"time"
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)
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// PresetID identifies a seasonal content-calendar preset.
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type PresetID string
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const (
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PresetBlackFriday PresetID = "black_friday"
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PresetChristmas PresetID = "christmas"
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)
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// CampaignStructureKey is stored on export_feeds.template JSON (no migration).
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const CampaignStructureKey = "_campaign"
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// Preset is a dated seasonal window for preparing an export feed.
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type Preset struct {
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ID PresetID `json:"id"`
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Name string `json:"name"`
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Description string `json:"description"`
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StartDate string `json:"start_date"`
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EndDate string `json:"end_date"`
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Year int `json:"year"`
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}
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// StructureMeta is persisted under template._campaign.
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type StructureMeta struct {
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PresetID PresetID `json:"presetId"`
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Name string `json:"name"`
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StartDate string `json:"startDate"`
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EndDate string `json:"endDate"`
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Year int `json:"year"`
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PreparedAt string `json:"preparedAt"`
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}
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func pad2(n int) string {
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return fmt.Sprintf("%02d", n)
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}
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func toISODate(t time.Time) string {
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return fmt.Sprintf("%s-%s-%s", pad2(t.Year()), pad2(int(t.Month())), pad2(t.Day()))
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}
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// BlackFridayDate returns Black Friday (day after US Thanksgiving) in UTC date parts.
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func BlackFridayDate(year int) time.Time {
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nov1 := time.Date(year, time.November, 1, 0, 0, 0, 0, time.UTC)
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dow := int(nov1.Weekday()) // Sunday=0
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firstThursday := 1 + ((4 - dow + 7) % 7)
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fourthThursday := firstThursday + 21
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return time.Date(year, time.November, fourthThursday+1, 0, 0, 0, 0, time.UTC)
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}
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// ResolvePreset returns date window for a preset id and year.
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func ResolvePreset(id PresetID, year int) (Preset, error) {
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if year < 2000 || year > 2100 {
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return Preset{}, ClientMsg("invalid year")
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}
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switch id {
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case PresetBlackFriday:
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bf := BlackFridayDate(year)
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start := bf.AddDate(0, 0, -7)
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end := bf.AddDate(0, 0, 3)
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return Preset{
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ID: id,
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Name: "Black Friday",
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Description: "Promo window around Black Friday — prepare a Google Shopping-style export feed.",
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StartDate: toISODate(start),
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EndDate: toISODate(end),
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Year: year,
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}, nil
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case PresetChristmas:
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return Preset{
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ID: PresetChristmas,
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Name: "Christmas",
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Description: "Holiday catalog push from Dec 1 through Boxing Day.",
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StartDate: toISODate(time.Date(year, time.December, 1, 0, 0, 0, 0, time.UTC)),
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EndDate: toISODate(time.Date(year, time.December, 26, 0, 0, 0, 0, time.UTC)),
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Year: year,
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}, nil
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default:
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return Preset{}, ClientMsg("preset_id must be black_friday or christmas")
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}
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}
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// ListPresets returns Black Friday + Christmas for the year.
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func ListPresets(year int) []Preset {
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bf, _ := ResolvePreset(PresetBlackFriday, year)
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xmas, _ := ResolvePreset(PresetChristmas, year)
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return []Preset{bf, xmas}
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}
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// DefaultCampaignMappings are Google Shopping-ish CSV column → product field sources.
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func DefaultCampaignMappings() map[string]string {
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return map[string]string{
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"id": "product_id",
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"title": "processed_name",
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"description": "processed_description",
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"link": "attr.url",
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"image_link": "attr.image",
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"availability": "attr.availability",
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"price": "attr.price",
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"brand": "attr.brand",
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"gtin": "gtin",
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"google_product_category": "category",
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"condition": "attr.condition",
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}
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}
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