Masahiko AMANO
830e411d92
Previous version of Tanabata used as visual and functional reference for the new Go + SvelteKit rewrite. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
package postgres
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import (
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"fmt"
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"net/http"
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"strconv"
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"strings"
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)
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// Convert "filter" URL param to SQL "WHERE" condition
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func filterToSQL(filter string) (sql string, statusCode int, err error) {
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// filterTokens := strings.Split(string(filter), ";")
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sql = "(true)"
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return
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}
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// Convert "sort" URL param to SQL "ORDER BY"
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func sortToSQL(sort string) (sql string, statusCode int, err error) {
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if sort == "" {
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return
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}
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sortOptions := strings.Split(sort, ",")
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sql = " ORDER BY "
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for i, sortOption := range sortOptions {
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sortOrder := sortOption[:1]
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sortColumn := sortOption[1:]
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// parse sorting order marker
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switch sortOrder {
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case "+":
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sortOrder = "ASC"
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case "-":
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sortOrder = "DESC"
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default:
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err = fmt.Errorf("invalid sorting order mark: %q", sortOrder)
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statusCode = http.StatusBadRequest
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return
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}
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// validate sorting column
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var n int
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n, err = strconv.Atoi(sortColumn)
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if err != nil || n < 0 {
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err = fmt.Errorf("invalid sorting column: %q", sortColumn)
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statusCode = http.StatusBadRequest
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return
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}
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// add sorting option to query
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if i > 0 {
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sql += ","
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}
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sql += fmt.Sprintf("%s %s NULLS LAST", sortColumn, sortOrder)
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}
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return
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}
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