351 lines
9.3 KiB
Go
351 lines
9.3 KiB
Go
/* Copyright Azareal 2016 - 2018 */
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package main
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import (
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//"fmt"
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"log"
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"io"
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"os"
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"bytes"
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"strings"
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"mime"
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"io/ioutil"
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"path/filepath"
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"encoding/json"
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"net/http"
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"text/template"
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)
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var defaultTheme string
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var themes map[string]Theme = make(map[string]Theme)
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//var overriden_templates map[string]interface{} = make(map[string]interface{})
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var overriden_templates map[string]bool = make(map[string]bool)
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type Theme struct
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{
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Name string
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FriendlyName string
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Version string
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Creator string
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FullImage string
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MobileFriendly bool
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Disabled bool
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HideFromThemes bool
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ForkOf string
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Tag string
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URL string
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Sidebars string // Allowed Values: left, right, both, false
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Settings map[string]ThemeSetting
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Templates []TemplateMapping
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TemplatesMap map[string]string
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Resources []ThemeResource
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ResourceTemplates *template.Template
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// This variable should only be set and unset by the system, not the theme meta file
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Active bool
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}
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type ThemeSetting struct
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{
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FriendlyName string
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Options []string
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}
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type TemplateMapping struct
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{
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Name string
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Source string
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//When string
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}
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type ThemeResource struct
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{
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Name string
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Location string
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}
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func LoadThemes() error {
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rows, err := get_themes_stmt.Query()
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if err != nil {
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return err
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}
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defer rows.Close()
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var uname string
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var defaultThemeSwitch bool
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for rows.Next() {
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err = rows.Scan(&uname, &defaultThemeSwitch)
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if err != nil {
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return err
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}
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// Was the theme deleted at some point?
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theme, ok := themes[uname]
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if !ok {
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continue
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}
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theme.TemplatesMap = make(map[string]string)
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if theme.Templates != nil {
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for _, themeTmpl := range theme.Templates {
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theme.TemplatesMap[themeTmpl.Name] = themeTmpl.Source
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}
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}
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theme.ResourceTemplates = template.New("")
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template.Must(theme.ResourceTemplates.ParseGlob("./themes/" + uname + "/public/*.css"))
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if defaultThemeSwitch {
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log.Print("Loading the theme '" + theme.Name + "'")
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theme.Active = true
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defaultTheme = uname
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add_theme_static_files(theme)
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map_theme_templates(theme)
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} else {
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theme.Active = false
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}
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themes[uname] = theme
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}
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err = rows.Err()
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if err != nil {
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return err
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}
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return nil
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}
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func init_themes() {
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themeFiles, err := ioutil.ReadDir("./themes")
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if err != nil {
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log.Fatal(err)
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}
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for _, themeFile := range themeFiles {
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if !themeFile.IsDir() {
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continue
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}
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themeName := themeFile.Name()
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log.Print("Adding theme '" + themeName + "'")
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themeFile, err := ioutil.ReadFile("./themes/" + themeName + "/theme.json")
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if err != nil {
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log.Fatal(err)
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}
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var theme Theme
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err = json.Unmarshal(themeFile, &theme)
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if err != nil {
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log.Fatal(err)
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}
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theme.Active = false // Set this to false, just in case someone explicitly overrode this value in the JSON file
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if theme.FullImage != "" {
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if dev.DebugMode {
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log.Print("Adding theme image")
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}
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err = add_static_file("./themes/" + themeName + "/" + theme.FullImage, "./themes/" + themeName)
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if err != nil {
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log.Fatal(err)
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}
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}
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themes[theme.Name] = theme
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}
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}
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func add_theme_static_files(theme Theme) {
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err := filepath.Walk("./themes/" + theme.Name + "/public", func(path string, f os.FileInfo, err error) error {
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if dev.DebugMode {
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log.Print("Attempting to add static file '" + path + "' for default theme '" + theme.Name + "'")
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}
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if err != nil {
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return err
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}
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if f.IsDir() {
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return nil
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}
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path = strings.Replace(path,"\\","/",-1)
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data, err := ioutil.ReadFile(path)
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if err != nil {
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return err
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}
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var ext string = filepath.Ext(path)
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//log.Print("path ",path)
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//log.Print("ext ",ext)
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if ext == ".css" && len(data) != 0 {
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var b bytes.Buffer
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var pieces []string = strings.Split(path,"/")
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var filename string = pieces[len(pieces) - 1]
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//log.Print("filename ", filename)
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err = theme.ResourceTemplates.ExecuteTemplate(&b,filename, CssData{ComingSoon:"We don't have any data to pass you yet!"})
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if err != nil {
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return err
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}
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data = b.Bytes()
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}
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path = strings.TrimPrefix(path,"themes/" + theme.Name + "/public")
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gzip_data := compress_bytes_gzip(data)
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static_files["/static" + path] = SFile{data,gzip_data,0,int64(len(data)),int64(len(gzip_data)),mime.TypeByExtension(ext),f,f.ModTime().UTC().Format(http.TimeFormat)}
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if dev.DebugMode {
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log.Print("Added the '" + path + "' static file for default theme " + theme.Name + ".")
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}
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return nil
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})
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if err != nil {
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panic(err)
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}
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}
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func map_theme_templates(theme Theme) {
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if theme.Templates != nil {
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for _, themeTmpl := range theme.Templates {
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if themeTmpl.Name == "" {
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log.Fatal("Invalid destination template name")
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}
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if themeTmpl.Source == "" {
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log.Fatal("Invalid source template name")
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}
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// `go generate` is one possibility for letting plugins inject custom page structs, but it would simply add another step of compilation. It might be simpler than the current build process from the perspective of the administrator?
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dest_tmpl_ptr, ok := tmpl_ptr_map[themeTmpl.Name]
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if !ok {
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return
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}
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source_tmpl_ptr, ok := tmpl_ptr_map[themeTmpl.Source]
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if !ok {
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log.Fatal("The source template doesn't exist!")
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}
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switch d_tmpl_ptr := dest_tmpl_ptr.(type) {
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case *func(TopicPage,io.Writer):
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switch s_tmpl_ptr := source_tmpl_ptr.(type) {
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case *func(TopicPage,io.Writer):
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//overriden_templates[themeTmpl.Name] = d_tmpl_ptr
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overriden_templates[themeTmpl.Name] = true
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*d_tmpl_ptr = *s_tmpl_ptr
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default:
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log.Fatal("The source and destination templates are incompatible")
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}
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case *func(TopicsPage,io.Writer):
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switch s_tmpl_ptr := source_tmpl_ptr.(type) {
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case *func(TopicsPage,io.Writer):
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//overriden_templates[themeTmpl.Name] = d_tmpl_ptr
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overriden_templates[themeTmpl.Name] = true
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*d_tmpl_ptr = *s_tmpl_ptr
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default:
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log.Fatal("The source and destination templates are incompatible")
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}
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case *func(ForumPage,io.Writer):
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switch s_tmpl_ptr := source_tmpl_ptr.(type) {
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case *func(ForumPage,io.Writer):
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//overriden_templates[themeTmpl.Name] = d_tmpl_ptr
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overriden_templates[themeTmpl.Name] = true
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*d_tmpl_ptr = *s_tmpl_ptr
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default:
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log.Fatal("The source and destination templates are incompatible")
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}
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case *func(ForumsPage,io.Writer):
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switch s_tmpl_ptr := source_tmpl_ptr.(type) {
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case *func(ForumsPage,io.Writer):
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//overriden_templates[themeTmpl.Name] = d_tmpl_ptr
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overriden_templates[themeTmpl.Name] = true
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*d_tmpl_ptr = *s_tmpl_ptr
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default:
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log.Fatal("The source and destination templates are incompatible")
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}
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case *func(ProfilePage,io.Writer):
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switch s_tmpl_ptr := source_tmpl_ptr.(type) {
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case *func(ProfilePage,io.Writer):
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//overriden_templates[themeTmpl.Name] = d_tmpl_ptr
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overriden_templates[themeTmpl.Name] = true
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*d_tmpl_ptr = *s_tmpl_ptr
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default:
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log.Fatal("The source and destination templates are incompatible")
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}
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case *func(Page,io.Writer):
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switch s_tmpl_ptr := source_tmpl_ptr.(type) {
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case *func(Page,io.Writer):
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//overriden_templates[themeTmpl.Name] = d_tmpl_ptr
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overriden_templates[themeTmpl.Name] = true
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*d_tmpl_ptr = *s_tmpl_ptr
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default:
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log.Fatal("The source and destination templates are incompatible")
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}
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default:
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log.Fatal("Unknown destination template type!")
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}
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}
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}
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}
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func reset_template_overrides() {
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log.Print("Resetting the template overrides")
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for name, _ := range overriden_templates {
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log.Print("Resetting '" + name + "' template override")
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origin_pointer, ok := tmpl_ptr_map["o_" + name]
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if !ok {
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//log.Fatal("The origin template doesn't exist!")
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log.Print("The origin template doesn't exist!")
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return
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}
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dest_tmpl_ptr, ok := tmpl_ptr_map[name]
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if !ok {
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//log.Fatal("The destination template doesn't exist!")
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log.Print("The destination template doesn't exist!")
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return
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}
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// Not really a pointer, more of a function handle, an artifact from one of the earlier versions of themes.go
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switch o_ptr := origin_pointer.(type) {
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case func(TopicPage,io.Writer):
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switch d_ptr := dest_tmpl_ptr.(type) {
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case *func(TopicPage,io.Writer):
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*d_ptr = o_ptr
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default:
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log.Fatal("The origin and destination templates are incompatible")
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}
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case func(TopicsPage,io.Writer):
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switch d_ptr := dest_tmpl_ptr.(type) {
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case *func(TopicsPage,io.Writer):
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*d_ptr = o_ptr
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default:
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log.Fatal("The origin and destination templates are incompatible")
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}
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case func(ForumPage,io.Writer):
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switch d_ptr := dest_tmpl_ptr.(type) {
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case *func(ForumPage,io.Writer):
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*d_ptr = o_ptr
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default:
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log.Fatal("The origin and destination templates are incompatible")
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}
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case func(ForumsPage,io.Writer):
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switch d_ptr := dest_tmpl_ptr.(type) {
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case *func(ForumsPage,io.Writer):
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*d_ptr = o_ptr
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default:
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log.Fatal("The origin and destination templates are incompatible")
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}
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case func(ProfilePage,io.Writer):
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switch d_ptr := dest_tmpl_ptr.(type) {
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case *func(ProfilePage,io.Writer):
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*d_ptr = o_ptr
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default:
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log.Fatal("The origin and destination templates are incompatible")
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}
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default:
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log.Fatal("Unknown destination template type!")
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}
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log.Print("The template override was reset")
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}
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overriden_templates = make(map[string]bool)
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log.Print("All of the template overrides have been reset")
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}
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