416 lines
12 KiB
Go
416 lines
12 KiB
Go
package common
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import (
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"bytes"
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"database/sql"
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"fmt"
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"io"
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"io/ioutil"
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"strconv"
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"../query_gen/lib"
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)
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type MenuItemList []MenuItem
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type MenuListHolder struct {
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List MenuItemList
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Variations map[int]menuTmpl // 0 = Guest Menu, 1 = Member Menu, 2 = Super Mod Menu, 3 = Admin Menu
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}
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type menuTmpl struct {
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RenderBuffer [][]byte
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VariableIndices []int
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}
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type MenuItem struct {
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ID int
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MenuID int
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Name string
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HTMLID string
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CSSClass string
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Position string
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Path string
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Aria string
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Tooltip string
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Order int
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TmplName string
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GuestOnly bool
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MemberOnly bool
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SuperModOnly bool
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AdminOnly bool
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}
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type MenuItemStmts struct {
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update *sql.Stmt
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}
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var menuItemStmts MenuItemStmts
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func init() {
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DbInits.Add(func(acc *qgen.Accumulator) error {
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menuItemStmts = MenuItemStmts{
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update: acc.Update("menu_items").Set("name = ?, htmlID = ?, cssClass = ?, position = ?, path = ?, aria = ?, tooltip = ?, tmplName = ?, guestOnly = ?, memberOnly = ?, staffOnly = ?, adminOnly = ?").Where("miid = ?").Prepare(),
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}
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return acc.FirstError()
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})
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}
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func (item MenuItem) Commit() error {
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_, err := menuItemStmts.update.Exec(item.Name, item.HTMLID, item.CSSClass, item.Position, item.Path, item.Aria, item.Tooltip, item.TmplName, item.GuestOnly, item.MemberOnly, item.SuperModOnly, item.AdminOnly, item.ID)
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Menus.Load(item.MenuID)
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return err
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}
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func (hold *MenuListHolder) LoadTmpl(name string) (menuTmpl MenuTmpl, err error) {
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data, err := ioutil.ReadFile("./templates/" + name + ".html")
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if err != nil {
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return menuTmpl, err
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}
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return hold.Parse(name, data), nil
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}
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func (hold *MenuListHolder) LoadTmpls() (tmpls map[string]MenuTmpl, err error) {
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tmpls = make(map[string]MenuTmpl)
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var loadTmpl = func(name string) error {
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menuTmpl, err := hold.LoadTmpl(name)
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if err != nil {
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return err
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}
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tmpls[name] = menuTmpl
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return nil
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}
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err = loadTmpl("menu_item")
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if err != nil {
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return tmpls, err
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}
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err = loadTmpl("menu_alerts")
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return tmpls, err
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}
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// TODO: Run this in main, sync ticks, when the phrase file changes (need to implement the sync for that first), and when the settings are changed
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func (hold *MenuListHolder) Preparse() error {
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tmpls, err := hold.LoadTmpls()
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if err != nil {
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return err
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}
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var addVariation = func(index int, callback func(mitem MenuItem) bool) {
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renderBuffer, variableIndices := hold.Scan(tmpls, callback)
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hold.Variations[index] = menuTmpl{renderBuffer, variableIndices}
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//fmt.Print("renderBuffer: ")
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//menuDumpSlice(renderBuffer)
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//fmt.Printf("\nvariableIndices: %+v\n", variableIndices)
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}
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// Guest Menu
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addVariation(0, func(mitem MenuItem) bool {
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return !mitem.MemberOnly
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})
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// Member Menu
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addVariation(1, func(mitem MenuItem) bool {
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return !mitem.SuperModOnly && !mitem.GuestOnly
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})
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// Super Mod Menu
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addVariation(2, func(mitem MenuItem) bool {
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return !mitem.AdminOnly && !mitem.GuestOnly
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})
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// Admin Menu
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addVariation(3, func(mitem MenuItem) bool {
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return !mitem.GuestOnly
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})
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return nil
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}
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func nextCharIs(tmplData []byte, i int, expects byte) bool {
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if len(tmplData) <= (i + 1) {
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return false
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}
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return tmplData[i+1] == expects
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}
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func skipUntilIfExists(tmplData []byte, i int, expects byte) (newI int, hasIt bool) {
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j := i
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for ; j < len(tmplData); j++ {
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if tmplData[j] == expects {
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return j, true
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}
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}
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return j, false
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}
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func skipUntilCharsExist(tmplData []byte, i int, expects []byte) (newI int, hasIt bool) {
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j := i
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expectIndex := 0
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for ; j < len(tmplData) && expectIndex < len(expects); j++ {
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if tmplData[j] != expects[expectIndex] {
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return j, false
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}
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expectIndex++
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}
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return j, true
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}
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type menuRenderItem struct {
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Type int // 0: text, 1: variable
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Index int
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}
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type MenuTmpl struct {
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Name string
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TextBuffer [][]byte
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VariableBuffer [][]byte
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RenderList []menuRenderItem
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}
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func menuDumpSlice(outerSlice [][]byte) {
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for sliceID, slice := range outerSlice {
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fmt.Print(strconv.Itoa(sliceID) + ":[")
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for _, char := range slice {
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fmt.Print(string(char))
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}
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fmt.Print("] ")
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}
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}
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func (hold *MenuListHolder) Parse(name string, tmplData []byte) (menuTmpl MenuTmpl) {
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//fmt.Println("tmplData: ", string(tmplData))
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var textBuffer, variableBuffer [][]byte
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var renderList []menuRenderItem
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var subBuffer []byte
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// ? We only support simple properties on MenuItem right now
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var addVariable = func(name []byte) {
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//fmt.Println("appending subBuffer: ", string(subBuffer))
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// TODO: Check if the subBuffer has any items or is empty
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textBuffer = append(textBuffer, subBuffer)
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subBuffer = nil
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//fmt.Println("adding variable: ", string(name))
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variableBuffer = append(variableBuffer, name)
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renderList = append(renderList, menuRenderItem{0, len(textBuffer) - 1})
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renderList = append(renderList, menuRenderItem{1, len(variableBuffer) - 1})
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}
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tmplData = bytes.Replace(tmplData, []byte("{{"), []byte("{"), -1)
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tmplData = bytes.Replace(tmplData, []byte("}}"), []byte("}}"), -1)
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for i := 0; i < len(tmplData); i++ {
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char := tmplData[i]
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if char == '{' {
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//fmt.Println("found open fence")
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dotIndex, hasDot := skipUntilIfExists(tmplData, i, '.')
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if !hasDot {
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//fmt.Println("no dot, assumed template function style")
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// Template function style
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langIndex, hasChars := skipUntilCharsExist(tmplData, i+1, []byte("lang"))
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if hasChars {
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startIndex, hasStart := skipUntilIfExists(tmplData, langIndex, '"')
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endIndex, hasEnd := skipUntilIfExists(tmplData, startIndex+1, '"')
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if hasStart && hasEnd {
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fenceIndex, hasFence := skipUntilIfExists(tmplData, endIndex, '}')
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if !hasFence || !nextCharIs(tmplData, fenceIndex, '}') {
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break
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}
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//fmt.Println("tmplData[startIndex:endIndex]: ", tmplData[startIndex+1:endIndex])
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prefix := []byte("lang.")
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addVariable(append(prefix, tmplData[startIndex+1:endIndex]...))
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i = fenceIndex + 1
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continue
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}
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}
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break
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}
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fenceIndex, hasFence := skipUntilIfExists(tmplData, dotIndex, '}')
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if !hasFence {
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//fmt.Println("no end fence")
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break
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}
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addVariable(tmplData[dotIndex:fenceIndex])
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i = fenceIndex + 1
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continue
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}
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subBuffer = append(subBuffer, char)
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}
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if len(subBuffer) > 0 {
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// TODO: Have a property in renderList which holds the byte slice since variableBuffers and textBuffers have the same underlying implementation?
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textBuffer = append(textBuffer, subBuffer)
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renderList = append(renderList, menuRenderItem{0, len(textBuffer) - 1})
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}
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//fmt.Println("name: ", name)
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//fmt.Print("textBuffer: ")
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//menuDumpSlice(textBuffer)
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//fmt.Print("\nvariableBuffer: ")
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//menuDumpSlice(variableBuffer)
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//fmt.Printf("\nrenderList: %+v\n", renderList)
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return MenuTmpl{name, textBuffer, variableBuffer, renderList}
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}
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func (hold *MenuListHolder) Scan(menuTmpls map[string]MenuTmpl, showItem func(mitem MenuItem) bool) (renderBuffer [][]byte, variableIndices []int) {
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for _, mitem := range hold.List {
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// Do we want this item in this variation of the menu?
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if !showItem(mitem) {
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continue
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}
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renderBuffer, variableIndices = hold.ScanItem(menuTmpls, mitem, renderBuffer, variableIndices)
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}
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// TODO: Need more coalescing in the renderBuffer
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return renderBuffer, variableIndices
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}
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// Note: This doesn't do a visibility check like hold.Scan() does
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func (hold *MenuListHolder) ScanItem(menuTmpls map[string]MenuTmpl, mitem MenuItem, renderBuffer [][]byte, variableIndices []int) ([][]byte, []int) {
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menuTmpl, ok := menuTmpls[mitem.TmplName]
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if !ok {
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menuTmpl = menuTmpls["menu_item"]
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}
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//fmt.Println("menuTmpl: ", menuTmpl)
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for _, renderItem := range menuTmpl.RenderList {
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if renderItem.Type == 0 {
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renderBuffer = append(renderBuffer, menuTmpl.TextBuffer[renderItem.Index])
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continue
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}
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variable := menuTmpl.VariableBuffer[renderItem.Index]
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//fmt.Println("initial variable: ", string(variable))
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dotAt, hasDot := skipUntilIfExists(variable, 0, '.')
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if !hasDot {
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//fmt.Println("no dot")
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continue
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}
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if bytes.Equal(variable[:dotAt], []byte("lang")) {
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//fmt.Println("lang: ", string(bytes.TrimPrefix(variable[dotAt:], []byte("."))))
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renderBuffer = append(renderBuffer, []byte(GetTmplPhrase(string(bytes.TrimPrefix(variable[dotAt:], []byte("."))))))
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} else {
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var renderItem []byte
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switch string(variable) {
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case ".ID":
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renderItem = []byte(strconv.Itoa(mitem.ID))
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case ".Name":
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renderItem = []byte(mitem.Name)
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case ".HTMLID":
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renderItem = []byte(mitem.HTMLID)
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case ".CSSClass":
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renderItem = []byte(mitem.CSSClass)
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case ".Position":
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renderItem = []byte(mitem.Position)
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case ".Path":
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renderItem = []byte(mitem.Path)
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case ".Aria":
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renderItem = []byte(mitem.Aria)
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case ".Tooltip":
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renderItem = []byte(mitem.Tooltip)
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}
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_, hasInnerVar := skipUntilIfExists(renderItem, 0, '{')
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if hasInnerVar {
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//fmt.Println("inner var: ", string(renderItem))
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dotAt, hasDot := skipUntilIfExists(renderItem, 0, '.')
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endFence, hasEndFence := skipUntilIfExists(renderItem, dotAt, '}')
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if !hasDot || !hasEndFence || (endFence-dotAt) <= 1 {
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renderBuffer = append(renderBuffer, renderItem)
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variableIndices = append(variableIndices, len(renderBuffer)-1)
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continue
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}
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if bytes.Equal(renderItem[1:dotAt], []byte("lang")) {
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//fmt.Println("lang var: ", string(renderItem[dotAt+1:endFence]))
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renderBuffer = append(renderBuffer, []byte(GetTmplPhrase(string(renderItem[dotAt+1:endFence]))))
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} else {
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//fmt.Println("other var: ", string(variable[:dotAt]))
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if len(renderItem) > 0 {
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renderBuffer = append(renderBuffer, renderItem)
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variableIndices = append(variableIndices, len(renderBuffer)-1)
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}
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}
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continue
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}
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//fmt.Println("normal var: ", string(variable[:dotAt]))
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if len(renderItem) > 0 {
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renderBuffer = append(renderBuffer, renderItem)
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}
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}
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}
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return renderBuffer, variableIndices
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}
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// TODO: Pre-render the lang stuff
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func (hold *MenuListHolder) Build(w io.Writer, user *User) error {
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var mTmpl menuTmpl
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if !user.Loggedin {
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mTmpl = hold.Variations[0]
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} else if user.IsAdmin {
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mTmpl = hold.Variations[3]
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} else if user.IsSuperMod {
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mTmpl = hold.Variations[2]
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} else {
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mTmpl = hold.Variations[1]
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}
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if len(mTmpl.VariableIndices) == 0 {
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//fmt.Println("no variable indices")
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for _, renderItem := range mTmpl.RenderBuffer {
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//fmt.Printf("renderItem: %+v\n", renderItem)
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w.Write(renderItem)
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}
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return nil
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}
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var nearIndex = 0
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for index, renderItem := range mTmpl.RenderBuffer {
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if index != mTmpl.VariableIndices[nearIndex] {
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//fmt.Println("wrote text: ", string(renderItem))
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w.Write(renderItem)
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continue
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}
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//fmt.Println("variable: ", string(renderItem))
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variable := renderItem
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// ? - I can probably remove this check now that I've kicked it upstream, or we could keep it here for safety's sake?
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if len(variable) == 0 {
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continue
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}
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prevIndex := 0
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for i := 0; i < len(renderItem); i++ {
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fenceStart, hasFence := skipUntilIfExists(variable, i, '{')
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if !hasFence {
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continue
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}
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i = fenceStart
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fenceEnd, hasFence := skipUntilIfExists(variable, fenceStart, '}')
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if !hasFence {
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continue
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}
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i = fenceEnd
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dotAt, hasDot := skipUntilIfExists(variable, fenceStart, '.')
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if !hasDot {
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continue
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}
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//fmt.Println("checking me: ", string(variable[fenceStart+1:dotAt]))
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if bytes.Equal(variable[fenceStart+1:dotAt], []byte("me")) {
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//fmt.Println("maybe me variable")
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w.Write(variable[prevIndex:fenceStart])
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switch string(variable[dotAt+1 : fenceEnd]) {
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case "Link":
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w.Write([]byte(user.Link))
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case "Session":
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w.Write([]byte(user.Session))
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}
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prevIndex = fenceEnd
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}
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}
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//fmt.Println("prevIndex: ", prevIndex)
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//fmt.Println("len(variable)-1: ", len(variable)-1)
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w.Write(variable[prevIndex : len(variable)-1])
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if len(mTmpl.VariableIndices) > (nearIndex + 1) {
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nearIndex++
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}
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}
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return nil
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}
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