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This commit is contained in:
Simon Martens
227
controllers/page_jump_controller.go
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227
controllers/page_jump_controller.go
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package controllers
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import (
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"fmt"
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"strconv"
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"github.com/Theodor-Springmann-Stiftung/kgpz_web/helpers/logging"
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"github.com/Theodor-Springmann-Stiftung/kgpz_web/xmlmodels"
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"github.com/gofiber/fiber/v2"
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)
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// FindIssueByYearAndPage finds the first issue in a given year that contains the specified page
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func FindIssueByYearAndPage(year, page int, library *xmlmodels.Library) (*xmlmodels.Issue, error) {
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library.Issues.Lock()
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defer library.Issues.Unlock()
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var foundIssues []xmlmodels.Issue
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// Find all issues in the given year that contain the page
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for _, issue := range library.Issues.Array {
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if issue.Datum.When.Year == year && page >= issue.Von && page <= issue.Bis {
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foundIssues = append(foundIssues, issue)
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}
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}
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if len(foundIssues) == 0 {
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return nil, fmt.Errorf("no issue found containing page %d in year %d", page, year)
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}
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// Return the first issue chronologically (by issue number)
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firstIssue := foundIssues[0]
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for _, issue := range foundIssues {
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if issue.Number.No < firstIssue.Number.No {
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firstIssue = issue
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}
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}
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return &firstIssue, nil
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}
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func GetPageJump(kgpz *xmlmodels.Library) fiber.Handler {
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return func(c *fiber.Ctx) error {
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// Parse year parameter
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yearStr := c.Params("year")
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year, err := strconv.Atoi(yearStr)
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if err != nil || year < MINYEAR || year > MAXYEAR {
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logging.Debug("Invalid year for page jump: " + yearStr)
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return c.Status(fiber.StatusBadRequest).SendString(`
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<div id="year-error" class="text-red-600 text-sm mt-1">
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Ungültiges Jahr. Bitte wählen Sie ein Jahr zwischen ` + strconv.Itoa(MINYEAR) + ` und ` + strconv.Itoa(MAXYEAR) + `.
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</div>
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`)
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}
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// Parse page parameter
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pageStr := c.Params("page")
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page, err := strconv.Atoi(pageStr)
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if err != nil || page < 1 {
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logging.Debug("Invalid page for page jump: " + pageStr)
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return c.Status(fiber.StatusBadRequest).SendString(`
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<div id="page-error" class="text-red-600 text-sm mt-1">
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Ungültige Seitenzahl. Bitte geben Sie eine positive Zahl ein.
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</div>
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`)
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}
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// Find the issue containing this page
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issue, err := FindIssueByYearAndPage(year, page, kgpz)
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if err != nil {
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logging.Debug(fmt.Sprintf("Page %d not found in year %d: %v", page, year, err))
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return c.Status(fiber.StatusNotFound).SendString(`
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<div id="page-error" class="text-red-600 text-sm mt-1">
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Seite ` + pageStr + ` wurde in Jahr ` + yearStr + ` nicht gefunden.
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</div>
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`)
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}
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// Construct the redirect URL
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redirectURL := fmt.Sprintf("/%d/%d/%d", year, issue.Number.No, page)
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logging.Debug(fmt.Sprintf("Page jump: %s -> %s", c.OriginalURL(), redirectURL))
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// Return HTMX redirect
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c.Set("HX-Redirect", redirectURL)
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return c.SendStatus(fiber.StatusOK)
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}
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}
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// GetPageJumpForm handles POST requests for the page jump form
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func GetPageJumpForm(kgpz *xmlmodels.Library) fiber.Handler {
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return func(c *fiber.Ctx) error {
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// Parse form data
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yearStr := c.FormValue("year")
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pageStr := c.FormValue("page")
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// Validate year
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year, err := strconv.Atoi(yearStr)
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if err != nil || year < MINYEAR || year > MAXYEAR {
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logging.Debug("Invalid year in form: " + yearStr)
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// Get available years for dropdown (simplified for error case)
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availableYears := []int{}
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for y := MINYEAR; y <= MAXYEAR; y++ {
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availableYears = append(availableYears, y)
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}
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return c.Status(fiber.StatusBadRequest).SendString(renderPageJumpFormWithError(
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fmt.Sprintf("Ungültiges Jahr. Bitte wählen Sie ein Jahr zwischen %d und %d.", MINYEAR, MAXYEAR),
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"",
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availableYears,
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MINYEAR,
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pageStr,
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))
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}
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// Validate page
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page, err := strconv.Atoi(pageStr)
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if err != nil || page < 1 {
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logging.Debug("Invalid page in form: " + pageStr)
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// Get available years for dropdown
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availableYears := []int{}
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for y := MINYEAR; y <= MAXYEAR; y++ {
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availableYears = append(availableYears, y)
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}
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return c.Status(fiber.StatusBadRequest).SendString(renderPageJumpFormWithError(
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"",
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"Ungültige Seitenzahl. Bitte geben Sie eine positive Zahl ein.",
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availableYears,
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year,
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"",
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))
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}
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// Find the issue containing this page
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issue, err := FindIssueByYearAndPage(year, page, kgpz)
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if err != nil {
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logging.Debug(fmt.Sprintf("Page %d not found in year %d: %v", page, year, err))
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// Get available years for dropdown
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availableYears := []int{}
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for y := MINYEAR; y <= MAXYEAR; y++ {
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availableYears = append(availableYears, y)
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}
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return c.Status(fiber.StatusNotFound).SendString(renderPageJumpFormWithError(
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"",
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fmt.Sprintf("Seite %s wurde in Jahr %s nicht gefunden.", pageStr, yearStr),
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availableYears,
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year,
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pageStr,
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))
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}
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// Construct the redirect URL
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redirectURL := fmt.Sprintf("/%d/%d/%d", year, issue.Number.No, page)
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logging.Debug(fmt.Sprintf("Page jump form: year=%s, page=%s -> %s", yearStr, pageStr, redirectURL))
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// Return HTMX redirect
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c.Set("HX-Redirect", redirectURL)
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return c.SendStatus(fiber.StatusOK)
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}
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}
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// renderPageJumpFormWithError generates the page jump form HTML with error messages
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func renderPageJumpFormWithError(yearError, pageError string, availableYears []int, currentYear int, pageValue string) string {
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html := `<form hx-post="/jump" hx-swap="outerHTML" class="space-y-4">
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<div class="grid grid-cols-2 gap-4">
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<!-- Year Selection -->
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<div>
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<label for="jump-year" class="block text-sm font-medium text-slate-700 mb-1">Jahr</label>
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<select id="jump-year" name="year" class="w-full px-3 py-2 border `
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if yearError != "" {
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html += `border-red-300`
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} else {
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html += `border-slate-300`
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}
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html += ` rounded-md shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500">`
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for _, year := range availableYears {
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html += fmt.Sprintf(`<option value="%d"`, year)
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if year == currentYear {
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html += ` selected`
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}
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html += fmt.Sprintf(`>%d</option>`, year)
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}
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html += `</select>`
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if yearError != "" {
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html += fmt.Sprintf(`<div class="text-red-600 text-sm mt-1">%s</div>`, yearError)
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}
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html += `</div>
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<!-- Page Input -->
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<div>
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<label for="jump-page" class="block text-sm font-medium text-slate-700 mb-1">Seite</label>
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<input type="number" id="jump-page" name="page" min="1" placeholder="z.B. 42" value="` + pageValue + `" class="w-full px-3 py-2 border `
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if pageError != "" {
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html += `border-red-300`
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} else {
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html += `border-slate-300`
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}
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html += ` rounded-md shadow-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500">`
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if pageError != "" {
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html += fmt.Sprintf(`<div class="text-red-600 text-sm mt-1">%s</div>`, pageError)
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}
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html += `</div>
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</div>
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<!-- Submit Button -->
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<div class="text-center">
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<button type="submit" class="inline-flex items-center px-4 py-2 bg-blue-600 hover:bg-blue-700 text-white font-medium rounded-md shadow-sm transition-colors duration-200 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2">
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<i class="ri-arrow-right-line mr-2"></i>
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Zur Seite springen
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</button>
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</div>
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</form>`
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return html
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}
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