gosora/common/menus.go

514 lines
16 KiB
Go

package common
import (
"bytes"
"database/sql"
"fmt"
"io"
"io/ioutil"
"strconv"
"strings"
"github.com/Azareal/Gosora/common/phrases"
tmpl "github.com/Azareal/Gosora/common/templates"
qgen "github.com/Azareal/Gosora/query_gen"
)
type MenuItemList []MenuItem
type MenuListHolder struct {
MenuID int
List MenuItemList
Variations map[int]menuTmpl // 0 = Guest Menu, 1 = Member Menu, 2 = Super Mod Menu, 3 = Admin Menu
}
type menuPath struct {
Path string
Index int
}
type menuTmpl struct {
RenderBuffer [][]byte
VariableIndices []int
PathMappings []menuPath
}
type MenuItem struct {
ID int
MenuID int
Name string
HTMLID string
CSSClass string
Position string
Path string
Aria string
Tooltip string
Order int
TmplName string
GuestOnly bool
MemberOnly bool
SuperModOnly bool
AdminOnly bool
}
// TODO: Move the menu item stuff to it's own file
type MenuItemStmts struct {
update *sql.Stmt
insert *sql.Stmt
delete *sql.Stmt
updateOrder *sql.Stmt
}
var menuItemStmts MenuItemStmts
func init() {
DbInits.Add(func(acc *qgen.Accumulator) error {
mi := "menu_items"
menuItemStmts = MenuItemStmts{
update: acc.Update(mi).Set("name=?,htmlID=?,cssClass=?,position=?,path=?,aria=?,tooltip=?,tmplName=?,guestOnly=?,memberOnly=?,staffOnly=?,adminOnly=?").Where("miid=?").Prepare(),
insert: acc.Insert(mi).Columns("mid, name, htmlID, cssClass, position, path, aria, tooltip, tmplName, guestOnly, memberOnly, staffOnly, adminOnly").Fields("?,?,?,?,?,?,?,?,?,?,?,?,?").Prepare(),
delete: acc.Delete(mi).Where("miid=?").Prepare(),
updateOrder: acc.Update(mi).Set("order=?").Where("miid=?").Prepare(),
}
return acc.FirstError()
})
}
func (i MenuItem) Commit() error {
_, e := menuItemStmts.update.Exec(i.Name, i.HTMLID, i.CSSClass, i.Position, i.Path, i.Aria, i.Tooltip, i.TmplName, i.GuestOnly, i.MemberOnly, i.SuperModOnly, i.AdminOnly, i.ID)
Menus.Load(i.MenuID)
return e
}
func (i MenuItem) Create() (int, error) {
res, e := menuItemStmts.insert.Exec(i.MenuID, i.Name, i.HTMLID, i.CSSClass, i.Position, i.Path, i.Aria, i.Tooltip, i.TmplName, i.GuestOnly, i.MemberOnly, i.SuperModOnly, i.AdminOnly)
if e != nil {
return 0, e
}
Menus.Load(i.MenuID)
miid64, e := res.LastInsertId()
return int(miid64), e
}
func (i MenuItem) Delete() error {
_, e := menuItemStmts.delete.Exec(i.ID)
Menus.Load(i.MenuID)
return e
}
func (h *MenuListHolder) LoadTmpl(name string) (t MenuTmpl, e error) {
data, e := ioutil.ReadFile("./templates/" + name + ".html")
if e != nil {
return t, e
}
return h.Parse(name, []byte(tmpl.Minify(string(data)))), nil
}
// TODO: Make this atomic, maybe with a transaction or store the order on the menu itself?
func (h *MenuListHolder) UpdateOrder(updateMap map[int]int) error {
for miid, order := range updateMap {
_, e := menuItemStmts.updateOrder.Exec(order, miid)
if e != nil {
return e
}
}
Menus.Load(h.MenuID)
return nil
}
func (h *MenuListHolder) LoadTmpls() (tmpls map[string]MenuTmpl, e error) {
tmpls = make(map[string]MenuTmpl)
load := func(name string) error {
menuTmpl, e := h.LoadTmpl(name)
if e != nil {
return e
}
tmpls[name] = menuTmpl
return nil
}
e = load("menu_item")
if e != nil {
return tmpls, e
}
e = load("menu_alerts")
return tmpls, e
}
// 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
func (h *MenuListHolder) Preparse() error {
tmpls, err := h.LoadTmpls()
if err != nil {
return err
}
addVariation := func(index int, callback func(i MenuItem) bool) {
renderBuffer, variableIndices, pathList := h.Scan(tmpls, callback)
h.Variations[index] = menuTmpl{renderBuffer, variableIndices, pathList}
}
// Guest Menu
addVariation(0, func(i MenuItem) bool {
return !i.MemberOnly
})
// Member Menu
addVariation(1, func(i MenuItem) bool {
return !i.SuperModOnly && !i.GuestOnly
})
// Super Mod Menu
addVariation(2, func(i MenuItem) bool {
return !i.AdminOnly && !i.GuestOnly
})
// Admin Menu
addVariation(3, func(i MenuItem) bool {
return !i.GuestOnly
})
return nil
}
func nextCharIs(tmplData []byte, i int, expects byte) bool {
if len(tmplData) <= (i + 1) {
return false
}
return tmplData[i+1] == expects
}
func peekNextChar(tmplData []byte, i int) byte {
if len(tmplData) <= (i + 1) {
return 0
}
return tmplData[i+1]
}
func skipUntilIfExists(tmplData []byte, i int, expects byte) (newI int, hasIt bool) {
j := i
for ; j < len(tmplData); j++ {
if tmplData[j] == expects {
return j, true
}
}
return j, false
}
func skipUntilIfExistsOrLine(tmplData []byte, i int, expects byte) (newI int, hasIt bool) {
j := i
for ; j < len(tmplData); j++ {
if tmplData[j] == 10 {
return j, false
} else if tmplData[j] == expects {
return j, true
}
}
return j, false
}
func skipUntilCharsExist(tmplData []byte, i int, expects []byte) (newI int, hasIt bool) {
j := i
expectIndex := 0
for ; j < len(tmplData) && expectIndex < len(expects); j++ {
//fmt.Println("tmplData[j]: ", string(tmplData[j]))
if tmplData[j] != expects[expectIndex] {
return j, false
}
//fmt.Printf("found %+v at %d\n", string(expects[expectIndex]), expectIndex)
expectIndex++
}
return j, true
}
func skipAllUntilCharsExist(tmplData []byte, i int, expects []byte) (newI int, hasIt bool) {
j := i
expectIndex := 0
for ; j < len(tmplData) && expectIndex < len(expects); j++ {
if tmplData[j] == expects[expectIndex] {
//fmt.Printf("expects[expectIndex]: %+v - %d\n", string(expects[expectIndex]), expectIndex)
expectIndex++
if len(expects) <= expectIndex {
break
}
} else {
/*if expectIndex != 0 {
fmt.Println("broke expectations")
fmt.Println("expected: ", string(expects[expectIndex]))
fmt.Println("got: ", string(tmplData[j]))
fmt.Println("next: ", string(peekNextChar(tmplData, j)))
fmt.Println("next: ", string(peekNextChar(tmplData, j+1)))
fmt.Println("next: ", string(peekNextChar(tmplData, j+2)))
fmt.Println("next: ", string(peekNextChar(tmplData, j+3)))
}*/
expectIndex = 0
}
}
return j, len(expects) == expectIndex
}
type menuRenderItem struct {
Type int // 0: text, 1: variable
Index int
}
type MenuTmpl struct {
Name string
TextBuffer [][]byte
VariableBuffer [][]byte
RenderList []menuRenderItem
}
func menuDumpSlice(outerSlice [][]byte) {
for sliceID, slice := range outerSlice {
fmt.Print(strconv.Itoa(sliceID) + ":[")
for _, ch := range slice {
fmt.Print(string(ch))
}
fmt.Print("] ")
}
}
func (h *MenuListHolder) Parse(name string, tmplData []byte) (menuTmpl MenuTmpl) {
var textBuffer, variableBuffer [][]byte
var renderList []menuRenderItem
var subBuffer []byte
// ? We only support simple properties on MenuItem right now
addVariable := func(name []byte) {
// TODO: Check if the subBuffer has any items or is empty
textBuffer = append(textBuffer, subBuffer)
subBuffer = nil
variableBuffer = append(variableBuffer, name)
renderList = append(renderList, menuRenderItem{0, len(textBuffer) - 1})
renderList = append(renderList, menuRenderItem{1, len(variableBuffer) - 1})
}
tmplData = bytes.Replace(tmplData, []byte("{{"), []byte("{"), -1)
tmplData = bytes.Replace(tmplData, []byte("}}"), []byte("}}"), -1)
for i := 0; i < len(tmplData); i++ {
char := tmplData[i]
if char == '{' {
dotIndex, hasDot := skipUntilIfExists(tmplData, i, '.')
if !hasDot {
// Template function style
langIndex, hasChars := skipUntilCharsExist(tmplData, i+1, []byte("lang"))
if hasChars {
startIndex, hasStart := skipUntilIfExists(tmplData, langIndex, '"')
endIndex, hasEnd := skipUntilIfExists(tmplData, startIndex+1, '"')
if hasStart && hasEnd {
fenceIndex, hasFence := skipUntilIfExists(tmplData, endIndex, '}')
if !hasFence || !nextCharIs(tmplData, fenceIndex, '}') {
break
}
//fmt.Println("tmplData[startIndex:endIndex]: ", tmplData[startIndex+1:endIndex])
prefix := []byte("lang.")
addVariable(append(prefix, tmplData[startIndex+1:endIndex]...))
i = fenceIndex + 1
continue
}
}
break
}
fenceIndex, hasFence := skipUntilIfExists(tmplData, dotIndex, '}')
if !hasFence {
break
}
addVariable(tmplData[dotIndex:fenceIndex])
i = fenceIndex + 1
continue
}
subBuffer = append(subBuffer, char)
}
if len(subBuffer) > 0 {
// TODO: Have a property in renderList which holds the byte slice since variableBuffers and textBuffers have the same underlying implementation?
textBuffer = append(textBuffer, subBuffer)
renderList = append(renderList, menuRenderItem{0, len(textBuffer) - 1})
}
return MenuTmpl{name, textBuffer, variableBuffer, renderList}
}
func (h *MenuListHolder) Scan(tmpls map[string]MenuTmpl, showItem func(i MenuItem) bool) (renderBuffer [][]byte, variableIndices []int, pathList []menuPath) {
for _, mitem := range h.List {
// Do we want this item in this variation of the menu?
if !showItem(mitem) {
continue
}
renderBuffer, variableIndices = h.ScanItem(tmpls, mitem, renderBuffer, variableIndices)
pathList = append(pathList, menuPath{mitem.Path, len(renderBuffer) - 1})
}
// TODO: Need more coalescing in the renderBuffer
return renderBuffer, variableIndices, pathList
}
// Note: This doesn't do a visibility check like hold.Scan() does
func (h *MenuListHolder) ScanItem(tmpls map[string]MenuTmpl, mitem MenuItem, renderBuffer [][]byte, variableIndices []int) ([][]byte, []int) {
menuTmpl, ok := tmpls[mitem.TmplName]
if !ok {
menuTmpl = tmpls["menu_item"]
}
for _, renderItem := range menuTmpl.RenderList {
if renderItem.Type == 0 {
renderBuffer = append(renderBuffer, menuTmpl.TextBuffer[renderItem.Index])
continue
}
variable := menuTmpl.VariableBuffer[renderItem.Index]
dotAt, hasDot := skipUntilIfExists(variable, 0, '.')
if !hasDot {
continue
}
if bytes.Equal(variable[:dotAt], []byte("lang")) {
renderBuffer = append(renderBuffer, []byte(phrases.GetTmplPhrase(string(bytes.TrimPrefix(variable[dotAt:], []byte("."))))))
continue
}
var renderItem []byte
switch string(variable) {
case ".ID":
renderItem = []byte(strconv.Itoa(mitem.ID))
case ".Name":
renderItem = []byte(mitem.Name)
case ".HTMLID":
renderItem = []byte(mitem.HTMLID)
case ".CSSClass":
renderItem = []byte(mitem.CSSClass)
case ".Position":
renderItem = []byte(mitem.Position)
case ".Path":
renderItem = []byte(mitem.Path)
case ".Aria":
renderItem = []byte(mitem.Aria)
case ".Tooltip":
renderItem = []byte(mitem.Tooltip)
case ".CSSActive":
renderItem = []byte("{dyn.active}")
}
_, hasInnerVar := skipUntilIfExists(renderItem, 0, '{')
if hasInnerVar {
DebugLog("inner var: ", string(renderItem))
dotAt, hasDot := skipUntilIfExists(renderItem, 0, '.')
endFence, hasEndFence := skipUntilIfExists(renderItem, dotAt, '}')
if !hasDot || !hasEndFence || (endFence-dotAt) <= 1 {
renderBuffer = append(renderBuffer, renderItem)
variableIndices = append(variableIndices, len(renderBuffer)-1)
continue
}
if bytes.Equal(renderItem[1:dotAt], []byte("lang")) {
//fmt.Println("lang var: ", string(renderItem[dotAt+1:endFence]))
renderBuffer = append(renderBuffer, []byte(phrases.GetTmplPhrase(string(renderItem[dotAt+1:endFence]))))
} else {
fmt.Println("other var: ", string(variable[:dotAt]))
if len(renderItem) > 0 {
renderBuffer = append(renderBuffer, renderItem)
variableIndices = append(variableIndices, len(renderBuffer)-1)
}
}
continue
}
if len(renderItem) > 0 {
renderBuffer = append(renderBuffer, renderItem)
}
}
return renderBuffer, variableIndices
}
// TODO: Pre-render the lang stuff
func (h *MenuListHolder) Build(w io.Writer, user *User, pathPrefix string) error {
var mTmpl menuTmpl
if !user.Loggedin {
mTmpl = h.Variations[0]
} else if user.IsAdmin {
mTmpl = h.Variations[3]
} else if user.IsSuperMod {
mTmpl = h.Variations[2]
} else {
mTmpl = h.Variations[1]
}
if pathPrefix == "" {
pathPrefix = Config.DefaultPath
}
if len(mTmpl.VariableIndices) == 0 {
for _, renderItem := range mTmpl.RenderBuffer {
w.Write(renderItem)
}
return nil
}
nearIndex := 0
for index, renderItem := range mTmpl.RenderBuffer {
if index != mTmpl.VariableIndices[nearIndex] {
w.Write(renderItem)
continue
}
variable := renderItem
// ? - I can probably remove this check now that I've kicked it upstream, or we could keep it here for safety's sake?
if len(variable) == 0 {
continue
}
prevIndex := 0
for i := 0; i < len(renderItem); i++ {
fenceStart, hasFence := skipUntilIfExists(variable, i, '{')
if !hasFence {
continue
}
i = fenceStart
fenceEnd, hasFence := skipUntilIfExists(variable, fenceStart, '}')
if !hasFence {
continue
}
i = fenceEnd
dotAt, hasDot := skipUntilIfExists(variable, fenceStart, '.')
if !hasDot {
continue
}
switch string(variable[fenceStart+1 : dotAt]) {
case "me":
w.Write(variable[prevIndex:fenceStart])
switch string(variable[dotAt+1 : fenceEnd]) {
case "Link":
w.Write([]byte(user.Link))
case "Session":
w.Write([]byte(user.Session))
}
prevIndex = fenceEnd
// TODO: Optimise this
case "dyn":
w.Write(variable[prevIndex:fenceStart])
var pmi int
for ii, pathItem := range mTmpl.PathMappings {
pmi = ii
if pathItem.Index > index {
break
}
}
if len(mTmpl.PathMappings) != 0 {
path := mTmpl.PathMappings[pmi].Path
if path == "" || path == "/" {
path = Config.DefaultPath
}
if strings.HasPrefix(path, pathPrefix) {
w.Write([]byte(" menu_active"))
}
}
prevIndex = fenceEnd
}
}
w.Write(variable[prevIndex : len(variable)-1])
if len(mTmpl.VariableIndices) > (nearIndex + 1) {
nearIndex++
}
}
return nil
}