mirror of
https://github.com/Theodor-Springmann-Stiftung/kgpz_web.git
synced 2025-10-28 16:45:32 +00:00
321 lines
8.1 KiB
Go
321 lines
8.1 KiB
Go
package app
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import (
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"os"
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"path/filepath"
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"sync"
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"github.com/Theodor-Springmann-Stiftung/kgpz_web/controllers"
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"github.com/Theodor-Springmann-Stiftung/kgpz_web/helpers"
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"github.com/Theodor-Springmann-Stiftung/kgpz_web/helpers/logging"
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"github.com/Theodor-Springmann-Stiftung/kgpz_web/providers"
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"github.com/Theodor-Springmann-Stiftung/kgpz_web/providers/gnd"
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searchprovider "github.com/Theodor-Springmann-Stiftung/kgpz_web/providers/search"
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"github.com/Theodor-Springmann-Stiftung/kgpz_web/providers/xmlprovider"
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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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"github.com/gofiber/fiber/v2/middleware/etag"
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)
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// It also implements Funcs() map[string]interface{} to map funcs to a template engine
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// It is meant to be constructed once and then used as a singleton.
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const (
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IMG_PREFIX = "/img/"
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EDITION_URL = "/edition/"
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PRIVACY_URL = "/datenschutz/"
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CONTACT_URL = "/kontakt/"
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CITATION_URL = "/zitation/"
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INDEX_URL = "/1764"
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YEAR_OVERVIEW_URL = "/:year"
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PLACE_OVERVIEW_URL = "/ort/:place"
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AGENTS_OVERVIEW_URL = "/akteure/:letterorid"
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CATEGORY_OVERVIEW_URL = "/kategorie/:category"
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ISSSUE_URL = "/:year/:issue/:page?"
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ADDITIONS_URL = "/:year/:issue/beilage/:page?"
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)
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type KGPZ struct {
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// INFO: We need to prevent concurrent reads and writes to the fs here since
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// - Git is accessing the FS
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// - The Library is accessing the FS
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// So we need to prevent concurrent pulls and serializations
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// This is what fsmu is for. IT IS NOT FOR SETTING Config, Repo. GND or Library.
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// Those are only set once during initalization and construction.
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fsmu sync.Mutex
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Config *providers.ConfigProvider
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Repo *providers.GitProvider
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GND *gnd.GNDProvider
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Library *xmlmodels.Library
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Search *searchprovider.SearchProvider
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}
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func NewKGPZ(config *providers.ConfigProvider) (*KGPZ, error) {
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helpers.AssertNonNil(config, "Config is nil")
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if err := config.Validate(); err != nil {
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helpers.Assert(err, "Error validating config")
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}
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kgpz := &KGPZ{Config: config}
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err := kgpz.Init()
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if err != nil {
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return nil, err
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}
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return kgpz, nil
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}
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func (k *KGPZ) Pre(srv *fiber.App) error {
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// Check if folder exists and if yes, serve image files from i
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if _, err := os.Stat(k.Config.Config.ImgPath); err == nil {
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fs := os.DirFS(k.Config.Config.ImgPath)
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srv.Use(IMG_PREFIX, etag.New())
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srv.Use(IMG_PREFIX, helpers.StaticHandler(&fs))
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} else {
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logging.Info("Image folder not found. Skipping image serving.")
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}
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return nil
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}
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func (k *KGPZ) Init() error {
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if gp, err := providers.NewGitProvider(
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k.Config.Config.GitURL,
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filepath.Join(k.Config.Config.BaseDIR, k.Config.Config.GITPath),
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k.Config.Config.GitBranch); err != nil {
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logging.Error(err, "Error initializing GitProvider. Continuing without Git.")
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} else {
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k.Repo = gp
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}
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if err := k.Serialize(); err != nil {
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logging.Error(err, "Error parsing XML.")
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return err
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}
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if err := k.initGND(); err != nil {
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logging.Error(err, "Error reading GND-Cache. Continuing.")
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}
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if sp, err := searchprovider.NewSearchProvider(filepath.Join(k.Config.Config.BaseDIR, k.Config.SearchPath)); err != nil {
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logging.Error(err, "Error initializing SearchProvider. Continuing without Search.")
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} else {
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k.Search = sp
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}
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k.Enrich()
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go k.Pull()
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k.BuildSearchIndex()
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return nil
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}
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func (k *KGPZ) initGND() error {
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k.GND = gnd.NewGNDProvider()
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return k.GND.ReadCache(filepath.Join(k.Config.BaseDIR, k.Config.GNDPath))
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}
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func (k *KGPZ) Routes(srv *fiber.App) error {
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srv.Get("/", func(c *fiber.Ctx) error {
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c.Redirect(INDEX_URL)
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return nil
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})
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srv.Get(PLACE_OVERVIEW_URL, controllers.GetPlace(k.Library))
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srv.Get(CATEGORY_OVERVIEW_URL, controllers.GetCategory(k.Library))
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srv.Get(AGENTS_OVERVIEW_URL, controllers.GetAgents(k.Library))
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// TODO: YEAR_OVERVIEW_URL being /:year is a bad idea, since it captures basically everything,
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// probably creating problems with static files, and also in case we add a front page later.
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// That's why we redirect to /1764 on "/ " above and don´t use an optional /:year? paramter.
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// -> Check SEO requirements on index pages that are 301 forwarded.
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// This applies to all paths with two or three segments without a static prefix:
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// Prob better to do /ausgabe/:year/:issue/:page? and /jahrgang/:year? respectively.
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srv.Get(YEAR_OVERVIEW_URL, controllers.GetYear(k.Library))
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srv.Get(ISSSUE_URL, controllers.GetIssue(k.Library))
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srv.Get(ADDITIONS_URL, controllers.GetIssue(k.Library))
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srv.Get(EDITION_URL, controllers.Get(EDITION_URL))
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srv.Get(PRIVACY_URL, controllers.Get(PRIVACY_URL))
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srv.Get(CONTACT_URL, controllers.Get(CONTACT_URL))
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srv.Get(CITATION_URL, controllers.Get(CITATION_URL))
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if k.Config.WebHookSecret != "" && k.Config.WebHookEndpoint != "" {
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handler, rc := controllers.PostWebhook(k.Config.WebHookSecret)
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srv.Post(k.Config.WebHookEndpoint, handler)
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go func() {
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for signal := range rc {
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if signal {
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k.Pull()
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}
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}
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}()
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}
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return nil
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}
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func (k *KGPZ) Funcs() map[string]interface{} {
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e := make(map[string]interface{})
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// App specific
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e["GetAgent"] = k.Library.Agents.Item
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e["GetPlace"] = k.Library.Places.Item
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e["GetWork"] = k.Library.Works.Item
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e["GetCategory"] = k.Library.Categories.Item
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e["GetIssue"] = k.Library.Issues.Item
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e["GetPiece"] = k.Library.Pieces.Item
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e["GetGND"] = k.GND.Person
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e["LookupPieces"] = k.Library.Pieces.ReverseLookup
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e["LookupWorks"] = k.Library.Works.ReverseLookup
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e["LookupIssues"] = k.Library.Issues.ReverseLookup
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return e
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}
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func (k *KGPZ) Enrich() error {
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if k.Library == nil || k.Library.Agents == nil {
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return nil
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}
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go func() {
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k.fsmu.Lock()
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defer k.fsmu.Unlock()
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data := xmlmodels.AgentsIntoDataset(k.Library.Agents)
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k.GND.FetchPersons(data)
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k.GND.WriteCache(filepath.Join(k.Config.BaseDIR, k.Config.GNDPath))
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}()
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return nil
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}
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func (k *KGPZ) BuildSearchIndex() error {
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if k.Library == nil || k.Library.Agents == nil || k.Search == nil {
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return nil
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}
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go func() {
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k.fsmu.Lock()
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defer k.fsmu.Unlock()
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wg := new(sync.WaitGroup)
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wg.Add(6)
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go func() {
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for _, agent := range k.Library.Agents.Array {
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err := k.Search.Index(agent, k.Library)
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if err != nil {
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logging.Error(err, "Error indexing agent")
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}
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}
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wg.Done()
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}()
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go func() {
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for _, place := range k.Library.Places.Array {
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err := k.Search.Index(place, k.Library)
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if err != nil {
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logging.Error(err, "Error indexing place")
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}
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}
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wg.Done()
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}()
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go func() {
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for _, cat := range k.Library.Categories.Array {
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err := k.Search.Index(cat, k.Library)
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if err != nil {
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logging.Error(err, "Error indexing category")
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}
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}
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wg.Done()
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}()
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go func() {
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for _, work := range k.Library.Works.Array {
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err := k.Search.Index(work, k.Library)
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if err != nil {
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logging.Error(err, "Error indexing work")
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}
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}
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wg.Done()
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}()
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go func() {
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for _, issue := range k.Library.Issues.Array {
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err := k.Search.Index(issue, k.Library)
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if err != nil {
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logging.Error(err, "Error indexing issue")
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}
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}
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wg.Done()
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}()
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go func() {
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for _, piece := range k.Library.Pieces.Array {
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err := k.Search.Index(piece, k.Library)
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if err != nil {
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logging.Error(err, "Error indexing piece")
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}
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}
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wg.Done()
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}()
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wg.Wait()
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logging.Info("Search index built.")
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}()
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return nil
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}
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func (k *KGPZ) Serialize() error {
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// TODO: this is error handling from hell
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// Preventing pulling and serializing at the same time
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k.fsmu.Lock()
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defer k.fsmu.Unlock()
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commit := ""
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source := xmlprovider.Path
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if k.Repo != nil {
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commit = k.Repo.Commit
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source = xmlprovider.Commit
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}
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if k.Library == nil {
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k.Library = xmlmodels.NewLibrary()
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}
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err := k.Library.Parse(source, filepath.Join(k.Config.BaseDIR, k.Config.GITPath), commit)
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return err
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}
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func (k *KGPZ) IsDebug() bool {
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return k.Config.Debug
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}
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func (k *KGPZ) Pull() {
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if k.Repo == nil {
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return
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}
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logging.Info("Pulling Repository...")
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k.fsmu.Lock()
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err, changed := k.Repo.Pull()
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logging.Error(err, "Error pulling GitProvider")
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k.fsmu.Unlock()
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if changed {
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logging.ObjDebug(&k.Repo, "Remote changed. Reparsing")
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k.Serialize()
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k.Enrich()
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k.BuildSearchIndex()
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}
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}
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func (k *KGPZ) Shutdown() {
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k.Repo.Wait()
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}
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