gosora/templates.go

1064 lines
31 KiB
Go

package main
import (
"bytes"
"fmt"
"log"
"strconv"
"strings"
//"regexp"
"io/ioutil"
"path/filepath"
"reflect"
"text/template/parse"
)
// TODO: Turn this file into a library
var ctemplates []string
var tmplPtrMap = make(map[string]interface{})
var textOverlapList = make(map[string]int)
// nolint
type VarItem struct {
Name string
Destination string
Type string
}
type VarItemReflect struct {
Name string
Destination string
Value reflect.Value
}
type CTemplateSet struct {
tlist map[string]*parse.Tree
dir string
funcMap map[string]interface{}
importMap map[string]string
Fragments map[string]int
FragmentCursor map[string]int
FragOut string
varList map[string]VarItem
localVars map[string]map[string]VarItemReflect
stats map[string]int
pVarList string
pVarPosition int
previousNode parse.NodeType
currentNode parse.NodeType
nextNode parse.NodeType
//tempVars map[string]string
doImports bool
expectsInt interface{}
}
func (c *CTemplateSet) compileTemplate(name string, dir string, expects string, expectsInt interface{}, varList map[string]VarItem) (out string, err error) {
if dev.DebugMode {
fmt.Println("Compiling template '" + name + "'")
}
c.dir = dir
c.doImports = true
c.funcMap = map[string]interface{}{
"and": "&&",
"not": "!",
"or": "||",
"eq": true,
"ge": true,
"gt": true,
"le": true,
"lt": true,
"ne": true,
"add": true,
"subtract": true,
"multiply": true,
"divide": true,
}
c.importMap = map[string]string{
"net/http": "net/http",
}
c.varList = varList
//c.pVarList = ""
//c.pVarPosition = 0
c.stats = make(map[string]int)
c.expectsInt = expectsInt
holdreflect := reflect.ValueOf(expectsInt)
res, err := ioutil.ReadFile(dir + name)
if err != nil {
return "", err
}
content := string(res)
if config.MinifyTemplates {
content = minify(content)
}
tree := parse.New(name, c.funcMap)
var treeSet = make(map[string]*parse.Tree)
tree, err = tree.Parse(content, "{{", "}}", treeSet, c.funcMap)
if err != nil {
return "", err
}
if dev.TemplateDebug {
fmt.Println(name)
}
out = ""
fname := strings.TrimSuffix(name, filepath.Ext(name))
c.tlist = make(map[string]*parse.Tree)
c.tlist[fname] = tree
varholder := "tmpl_" + fname + "_vars"
if dev.TemplateDebug {
fmt.Println(c.tlist)
}
c.localVars = make(map[string]map[string]VarItemReflect)
c.localVars[fname] = make(map[string]VarItemReflect)
c.localVars[fname]["."] = VarItemReflect{".", varholder, holdreflect}
if c.Fragments == nil {
c.Fragments = make(map[string]int)
}
c.FragmentCursor = make(map[string]int)
c.FragmentCursor[fname] = 0
subtree := c.tlist[fname]
if dev.TemplateDebug {
fmt.Println(subtree.Root)
}
treeLength := len(subtree.Root.Nodes)
for index, node := range subtree.Root.Nodes {
if dev.TemplateDebug {
fmt.Println("Node: " + node.String())
}
c.previousNode = c.currentNode
c.currentNode = node.Type()
if treeLength != (index + 1) {
c.nextNode = subtree.Root.Nodes[index+1].Type()
}
out += c.compileSwitch(varholder, holdreflect, fname, node)
}
var importList string
if c.doImports {
for _, item := range c.importMap {
importList += "import \"" + item + "\"\n"
}
}
var varString string
for _, varItem := range c.varList {
varString += "var " + varItem.Name + " " + varItem.Type + " = " + varItem.Destination + "\n"
}
fout := "// +build !no_templategen\n\n// Code generated by Gosora. More below:\n/* This file was automatically generated by the software. Please don't edit it as your changes may be overwritten at any moment. */\n"
fout += "package main\n" + importList + c.pVarList + "\n"
fout += "// nolint\nfunc init() {\n\ttemplate_" + fname + "_handle = template_" + fname + "\n\t//o_template_" + fname + "_handle = template_" + fname + "\n\tctemplates = append(ctemplates,\"" + fname + "\")\n\ttmplPtrMap[\"" + fname + "\"] = &template_" + fname + "_handle\n\ttmplPtrMap[\"o_" + fname + "\"] = template_" + fname + "\n}\n\n"
fout += "// nolint\nfunc template_" + fname + "(tmpl_" + fname + "_vars " + expects + ", w http.ResponseWriter) {\n" + varString + out + "}\n"
fout = strings.Replace(fout, `))
w.Write([]byte(`, " + ", -1)
fout = strings.Replace(fout, "` + `", "", -1)
//spstr := "`([:space:]*)`"
//whitespace_writes := regexp.MustCompile(`(?s)w.Write\(\[\]byte\(`+spstr+`\)\)`)
//fout = whitespace_writes.ReplaceAllString(fout,"")
if dev.DebugMode {
for index, count := range c.stats {
fmt.Println(index + ": " + strconv.Itoa(count))
}
fmt.Println(" ")
}
if dev.TemplateDebug {
fmt.Println("Output!")
fmt.Println(fout)
}
return fout, nil
}
func (c *CTemplateSet) compileSwitch(varholder string, holdreflect reflect.Value, templateName string, node interface{}) (out string) {
if dev.TemplateDebug {
fmt.Println("in compileSwitch")
}
switch node := node.(type) {
case *parse.ActionNode:
if dev.TemplateDebug {
fmt.Println("Action Node")
}
if node.Pipe == nil {
break
}
for _, cmd := range node.Pipe.Cmds {
out += c.compileSubswitch(varholder, holdreflect, templateName, cmd)
}
return out
case *parse.IfNode:
if dev.TemplateDebug {
fmt.Println("If Node:")
fmt.Println("node.Pipe", node.Pipe)
}
var expr string
for _, cmd := range node.Pipe.Cmds {
if dev.TemplateDebug {
fmt.Println("If Node Bit:", cmd)
fmt.Println("If Node Bit Type:", reflect.ValueOf(cmd).Type().Name())
}
expr += c.compileVarswitch(varholder, holdreflect, templateName, cmd)
if dev.TemplateDebug {
fmt.Println("If Node Expression Step:", c.compileVarswitch(varholder, holdreflect, templateName, cmd))
}
}
if dev.TemplateDebug {
fmt.Println("If Node Expression:", expr)
}
c.previousNode = c.currentNode
c.currentNode = parse.NodeList
c.nextNode = -1
if node.ElseList == nil {
if dev.TemplateDebug {
fmt.Println("Selected Branch 1")
}
return "if " + expr + " {\n" + c.compileSwitch(varholder, holdreflect, templateName, node.List) + "}\n"
}
if dev.TemplateDebug {
fmt.Println("Selected Branch 2")
}
return "if " + expr + " {\n" + c.compileSwitch(varholder, holdreflect, templateName, node.List) + "} else {\n" + c.compileSwitch(varholder, holdreflect, templateName, node.ElseList) + "}\n"
case *parse.ListNode:
if dev.TemplateDebug {
fmt.Println("List Node")
}
for _, subnode := range node.Nodes {
out += c.compileSwitch(varholder, holdreflect, templateName, subnode)
}
return out
case *parse.RangeNode:
if dev.TemplateDebug {
fmt.Println("Range Node!")
fmt.Println(node.Pipe)
}
var outVal reflect.Value
for _, cmd := range node.Pipe.Cmds {
if dev.TemplateDebug {
fmt.Println("Range Bit:", cmd)
}
out, outVal = c.compileReflectswitch(varholder, holdreflect, templateName, cmd)
}
if dev.TemplateDebug {
fmt.Println("Returned:", out)
fmt.Println("Range Kind Switch!")
}
switch outVal.Kind() {
case reflect.Map:
var item reflect.Value
for _, key := range outVal.MapKeys() {
item = outVal.MapIndex(key)
}
fmt.Println("Range item:", item)
if !item.IsValid() {
panic("item" + "^\n" + "Invalid map. Maybe, it doesn't have any entries for the template engine to analyse?")
}
if node.ElseList != nil {
out = "if len(" + out + ") != 0 {\nfor _, item := range " + out + " {\n" + c.compileSwitch("item", item, templateName, node.List) + "}\n} else {\n" + c.compileSwitch("item", item, templateName, node.ElseList) + "}\n"
} else {
out = "if len(" + out + ") != 0 {\nfor _, item := range " + out + " {\n" + c.compileSwitch("item", item, templateName, node.List) + "}\n}"
}
case reflect.Slice:
if outVal.Len() == 0 {
panic("The sample data needs at-least one or more elements for the slices. We're looking into removing this requirement at some point!")
}
item := outVal.Index(0)
out = "if len(" + out + ") != 0 {\nfor _, item := range " + out + " {\n" + c.compileSwitch("item", item, templateName, node.List) + "}\n}"
case reflect.Invalid:
return ""
}
if node.ElseList != nil {
out += " else {\n" + c.compileSwitch(varholder, holdreflect, templateName, node.ElseList) + "}\n"
} else {
out += "\n"
}
return out
case *parse.TemplateNode:
return c.compileSubtemplate(varholder, holdreflect, node)
case *parse.TextNode:
c.previousNode = c.currentNode
c.currentNode = node.Type()
c.nextNode = 0
tmpText := bytes.TrimSpace(node.Text)
if len(tmpText) == 0 {
return ""
}
//return "w.Write([]byte(`" + string(node.Text) + "`))\n"
fragmentName := templateName + "_" + strconv.Itoa(c.FragmentCursor[templateName])
_, ok := c.Fragments[fragmentName]
if !ok {
c.Fragments[fragmentName] = len(node.Text)
c.FragOut += "var " + fragmentName + " = []byte(`" + string(node.Text) + "`)\n"
}
c.FragmentCursor[templateName] = c.FragmentCursor[templateName] + 1
return "w.Write(" + fragmentName + ")\n"
default:
panic("Unknown Node in main switch")
}
return ""
}
func (c *CTemplateSet) compileSubswitch(varholder string, holdreflect reflect.Value, templateName string, node *parse.CommandNode) (out string) {
if dev.TemplateDebug {
fmt.Println("in compileSubswitch")
}
firstWord := node.Args[0]
switch n := firstWord.(type) {
case *parse.FieldNode:
if dev.TemplateDebug {
fmt.Println("Field Node:", n.Ident)
}
/* Use reflect to determine if the field is for a method, otherwise assume it's a variable. Variable declarations are coming soon! */
cur := holdreflect
var varbit string
if cur.Kind() == reflect.Interface {
cur = cur.Elem()
varbit += ".(" + cur.Type().Name() + ")"
}
for _, id := range n.Ident {
if dev.TemplateDebug {
fmt.Println("Data Kind:", cur.Kind().String())
fmt.Println("Field Bit:", id)
}
if cur.Kind() == reflect.Ptr {
if dev.TemplateDebug {
fmt.Println("Looping over pointer")
}
for cur.Kind() == reflect.Ptr {
cur = cur.Elem()
}
if dev.TemplateDebug {
fmt.Println("Data Kind:", cur.Kind().String())
fmt.Println("Field Bit:", id)
}
}
if !cur.IsValid() {
if dev.DebugMode {
fmt.Println("Debug Data:")
fmt.Println("Holdreflect:", holdreflect)
fmt.Println("Holdreflect.Kind()", holdreflect.Kind())
if !dev.TemplateDebug {
fmt.Println("cur.Kind():", cur.Kind().String())
}
fmt.Println("")
}
panic(varholder + varbit + "^\n" + "Invalid value. Maybe, it doesn't exist?")
}
cur = cur.FieldByName(id)
if cur.Kind() == reflect.Interface {
cur = cur.Elem()
// TODO: Surely, there's a better way of detecting this?
/*if cur.Kind() == reflect.String && cur.Type().Name() != "string" {
varbit = "string(" + varbit + "." + id + ")"*/
//if cur.Kind() == reflect.String && cur.Type().Name() != "string" {
if cur.Type().PkgPath() != "main" && cur.Type().PkgPath() != "" {
c.importMap["html/template"] = "html/template"
varbit += "." + id + ".(" + strings.TrimPrefix(cur.Type().PkgPath(), "html/") + "." + cur.Type().Name() + ")"
} else {
varbit += "." + id + ".(" + cur.Type().Name() + ")"
}
} else {
varbit += "." + id
}
if dev.TemplateDebug {
fmt.Println("End Cycle")
}
}
out = c.compileVarsub(varholder+varbit, cur)
for _, varItem := range c.varList {
if strings.HasPrefix(out, varItem.Destination) {
out = strings.Replace(out, varItem.Destination, varItem.Name, 1)
}
}
return out
case *parse.DotNode:
if dev.TemplateDebug {
fmt.Println("Dot Node:", node.String())
}
return c.compileVarsub(varholder, holdreflect)
case *parse.NilNode:
panic("Nil is not a command x.x")
case *parse.VariableNode:
if dev.TemplateDebug {
fmt.Println("Variable Node:", n.String())
fmt.Println(n.Ident)
}
varname, reflectVal := c.compileIfVarsub(n.String(), varholder, templateName, holdreflect)
return c.compileVarsub(varname, reflectVal)
case *parse.StringNode:
return n.Quoted
case *parse.IdentifierNode:
if dev.TemplateDebug {
fmt.Println("Identifier Node:", node)
fmt.Println("Identifier Node Args:", node.Args)
}
return c.compileVarsub(c.compileIdentswitch(varholder, holdreflect, templateName, node))
default:
fmt.Println("Unknown Kind:", reflect.ValueOf(firstWord).Elem().Kind())
fmt.Println("Unknown Type:", reflect.ValueOf(firstWord).Elem().Type().Name())
panic("I don't know what node this is")
}
}
func (c *CTemplateSet) compileVarswitch(varholder string, holdreflect reflect.Value, templateName string, node *parse.CommandNode) (out string) {
if dev.TemplateDebug {
fmt.Println("in compile_varswitch")
}
firstWord := node.Args[0]
switch n := firstWord.(type) {
case *parse.FieldNode:
if dev.TemplateDebug {
fmt.Println("Field Node:", n.Ident)
for _, id := range n.Ident {
fmt.Println("Field Bit:", id)
}
}
/* Use reflect to determine if the field is for a method, otherwise assume it's a variable. Coming Soon. */
return c.compileBoolsub(n.String(), varholder, templateName, holdreflect)
case *parse.ChainNode:
if dev.TemplateDebug {
fmt.Println("Chain Node:", n.Node)
fmt.Println("Chain Node Args:", node.Args)
}
break
case *parse.IdentifierNode:
if dev.TemplateDebug {
fmt.Println("Identifier Node:", node)
fmt.Println("Identifier Node Args:", node.Args)
}
return c.compileIdentswitchN(varholder, holdreflect, templateName, node)
case *parse.DotNode:
return varholder
case *parse.VariableNode:
if dev.TemplateDebug {
fmt.Println("Variable Node:", n.String())
fmt.Println("Variable Node Identifier:", n.Ident)
}
out, _ = c.compileIfVarsub(n.String(), varholder, templateName, holdreflect)
return out
case *parse.NilNode:
panic("Nil is not a command x.x")
case *parse.PipeNode:
if dev.TemplateDebug {
fmt.Println("Pipe Node!")
fmt.Println(n)
fmt.Println("Args:", node.Args)
}
out += c.compileIdentswitchN(varholder, holdreflect, templateName, node)
if dev.TemplateDebug {
fmt.Println("Out:", out)
}
return out
default:
fmt.Println("Unknown Kind:", reflect.ValueOf(firstWord).Elem().Kind())
fmt.Println("Unknown Type:", reflect.ValueOf(firstWord).Elem().Type().Name())
panic("I don't know what node this is! Grr...")
}
return ""
}
func (c *CTemplateSet) compileIdentswitchN(varholder string, holdreflect reflect.Value, templateName string, node *parse.CommandNode) (out string) {
if dev.TemplateDebug {
fmt.Println("in compile_identswitch_n")
}
out, _ = c.compileIdentswitch(varholder, holdreflect, templateName, node)
return out
}
func (c *CTemplateSet) compileIdentswitch(varholder string, holdreflect reflect.Value, templateName string, node *parse.CommandNode) (out string, val reflect.Value) {
if dev.TemplateDebug {
fmt.Println("in compileIdentswitch")
}
//var outbuf map[int]string
ArgLoop:
for pos := 0; pos < len(node.Args); pos++ {
id := node.Args[pos]
if dev.TemplateDebug {
fmt.Println("pos:", pos)
fmt.Println("ID:", id)
}
switch id.String() {
case "not":
out += "!"
case "or":
if dev.TemplateDebug {
fmt.Println("Building or function")
}
if pos == 0 {
fmt.Println("pos:", pos)
panic("or is missing a left operand")
}
if len(node.Args) <= pos {
fmt.Println("post pos:", pos)
fmt.Println("len(node.Args):", len(node.Args))
panic("or is missing a right operand")
}
left := c.compileBoolsub(node.Args[pos-1].String(), varholder, templateName, holdreflect)
_, funcExists := c.funcMap[node.Args[pos+1].String()]
var right string
if !funcExists {
right = c.compileBoolsub(node.Args[pos+1].String(), varholder, templateName, holdreflect)
}
out += left + " || " + right
if dev.TemplateDebug {
fmt.Println("Left operand:", node.Args[pos-1])
fmt.Println("Right operand:", node.Args[pos+1])
}
if !funcExists {
pos++
}
if dev.TemplateDebug {
fmt.Println("pos:", pos)
fmt.Println("len(node.Args):", len(node.Args))
}
case "and":
if dev.TemplateDebug {
fmt.Println("Building and function")
}
if pos == 0 {
fmt.Println("pos:", pos)
panic("and is missing a left operand")
}
if len(node.Args) <= pos {
fmt.Println("post pos:", pos)
fmt.Println("len(node.Args):", len(node.Args))
panic("and is missing a right operand")
}
left := c.compileBoolsub(node.Args[pos-1].String(), varholder, templateName, holdreflect)
_, funcExists := c.funcMap[node.Args[pos+1].String()]
var right string
if !funcExists {
right = c.compileBoolsub(node.Args[pos+1].String(), varholder, templateName, holdreflect)
}
out += left + " && " + right
if dev.TemplateDebug {
fmt.Println("Left operand:", node.Args[pos-1])
fmt.Println("Right operand:", node.Args[pos+1])
}
if !funcExists {
pos++
}
if dev.TemplateDebug {
fmt.Println("pos:", pos)
fmt.Println("len(node.Args):", len(node.Args))
}
case "le":
out += c.compileIfVarsubN(node.Args[pos+1].String(), varholder, templateName, holdreflect) + " <= " + c.compileIfVarsubN(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if dev.TemplateDebug {
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "lt":
out += c.compileIfVarsubN(node.Args[pos+1].String(), varholder, templateName, holdreflect) + " < " + c.compileIfVarsubN(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if dev.TemplateDebug {
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "gt":
out += c.compileIfVarsubN(node.Args[pos+1].String(), varholder, templateName, holdreflect) + " > " + c.compileIfVarsubN(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if dev.TemplateDebug {
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "ge":
out += c.compileIfVarsubN(node.Args[pos+1].String(), varholder, templateName, holdreflect) + " >= " + c.compileIfVarsubN(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if dev.TemplateDebug {
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "eq":
out += c.compileIfVarsubN(node.Args[pos+1].String(), varholder, templateName, holdreflect) + " == " + c.compileIfVarsubN(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if dev.TemplateDebug {
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "ne":
out += c.compileIfVarsubN(node.Args[pos+1].String(), varholder, templateName, holdreflect) + " != " + c.compileIfVarsubN(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if dev.TemplateDebug {
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "add":
param1, val2 := c.compileIfVarsub(node.Args[pos+1].String(), varholder, templateName, holdreflect)
param2, val3 := c.compileIfVarsub(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if val2.IsValid() {
val = val2
} else if val3.IsValid() {
val = val3
} else {
numSample := 1
val = reflect.ValueOf(numSample)
}
out += param1 + " + " + param2
if dev.TemplateDebug {
fmt.Println("add")
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "subtract":
param1, val2 := c.compileIfVarsub(node.Args[pos+1].String(), varholder, templateName, holdreflect)
param2, val3 := c.compileIfVarsub(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if val2.IsValid() {
val = val2
} else if val3.IsValid() {
val = val3
} else {
numSample := 1
val = reflect.ValueOf(numSample)
}
out += param1 + " - " + param2
if dev.TemplateDebug {
fmt.Println("subtract")
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "divide":
param1, val2 := c.compileIfVarsub(node.Args[pos+1].String(), varholder, templateName, holdreflect)
param2, val3 := c.compileIfVarsub(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if val2.IsValid() {
val = val2
} else if val3.IsValid() {
val = val3
} else {
numSample := 1
val = reflect.ValueOf(numSample)
}
out += param1 + " / " + param2
if dev.TemplateDebug {
fmt.Println("divide")
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
case "multiply":
param1, val2 := c.compileIfVarsub(node.Args[pos+1].String(), varholder, templateName, holdreflect)
param2, val3 := c.compileIfVarsub(node.Args[pos+2].String(), varholder, templateName, holdreflect)
if val2.IsValid() {
val = val2
} else if val3.IsValid() {
val = val3
} else {
numSample := 1
val = reflect.ValueOf(numSample)
}
out += param1 + " * " + param2
if dev.TemplateDebug {
fmt.Println("multiply")
fmt.Println("node.Args[pos + 1]", node.Args[pos+1])
fmt.Println("node.Args[pos + 2]", node.Args[pos+2])
}
break ArgLoop
default:
if dev.TemplateDebug {
fmt.Println("Variable!")
}
if len(node.Args) > (pos + 1) {
nextNode := node.Args[pos+1].String()
if nextNode == "or" || nextNode == "and" {
continue
}
}
out += c.compileIfVarsubN(id.String(), varholder, templateName, holdreflect)
}
}
//for _, outval := range outbuf {
// out += outval
//}
return out, val
}
func (c *CTemplateSet) compileReflectswitch(varholder string, holdreflect reflect.Value, templateName string, node *parse.CommandNode) (out string, outVal reflect.Value) {
if dev.TemplateDebug {
fmt.Println("in compileReflectswitch")
}
firstWord := node.Args[0]
switch n := firstWord.(type) {
case *parse.FieldNode:
if dev.TemplateDebug {
fmt.Println("Field Node:", n.Ident)
for _, id := range n.Ident {
fmt.Println("Field Bit:", id)
}
}
/* Use reflect to determine if the field is for a method, otherwise assume it's a variable. Coming Soon. */
return c.compileIfVarsub(n.String(), varholder, templateName, holdreflect)
case *parse.ChainNode:
if dev.TemplateDebug {
fmt.Println("Chain Node:", n.Node)
fmt.Println("node.Args", node.Args)
}
return "", outVal
case *parse.DotNode:
return varholder, holdreflect
case *parse.NilNode:
panic("Nil is not a command x.x")
default:
//panic("I don't know what node this is")
}
return "", outVal
}
func (c *CTemplateSet) compileIfVarsubN(varname string, varholder string, templateName string, cur reflect.Value) (out string) {
if dev.TemplateDebug {
fmt.Println("in compileIfVarsubN")
}
out, _ = c.compileIfVarsub(varname, varholder, templateName, cur)
return out
}
func (c *CTemplateSet) compileIfVarsub(varname string, varholder string, templateName string, cur reflect.Value) (out string, val reflect.Value) {
if dev.TemplateDebug {
fmt.Println("in compileIfVarsub")
}
if varname[0] != '.' && varname[0] != '$' {
return varname, cur
}
bits := strings.Split(varname, ".")
if varname[0] == '$' {
var res VarItemReflect
if varname[1] == '.' {
res = c.localVars[templateName]["."]
} else {
res = c.localVars[templateName][strings.TrimPrefix(bits[0], "$")]
}
out += res.Destination
cur = res.Value
if cur.Kind() == reflect.Interface {
cur = cur.Elem()
}
} else {
if cur.Kind() == reflect.Interface {
cur = cur.Elem()
out += varholder + ".(" + cur.Type().Name() + ")"
} else {
out += varholder
}
}
bits[0] = strings.TrimPrefix(bits[0], "$")
if dev.TemplateDebug {
fmt.Println("Cur Kind:", cur.Kind())
fmt.Println("Cur Type:", cur.Type().Name())
}
for _, bit := range bits {
if dev.TemplateDebug {
fmt.Println("Variable Field:", bit)
}
if bit == "" {
continue
}
// TODO: Fix this up so that it works for regular pointers and not just struct pointers. Ditto for the other cur.Kind() == reflect.Ptr we have in this file
if cur.Kind() == reflect.Ptr {
if dev.TemplateDebug {
fmt.Println("Looping over pointer")
}
for cur.Kind() == reflect.Ptr {
cur = cur.Elem()
}
if dev.TemplateDebug {
fmt.Println("Data Kind:", cur.Kind().String())
fmt.Println("Field Bit:", bit)
}
}
cur = cur.FieldByName(bit)
if cur.Kind() == reflect.Interface {
cur = cur.Elem()
out += "." + bit + ".(" + cur.Type().Name() + ")"
} else {
out += "." + bit
}
if !cur.IsValid() {
panic(out + "^\n" + "Invalid value. Maybe, it doesn't exist?")
}
if dev.TemplateDebug {
fmt.Println("Data Kind:", cur.Kind())
fmt.Println("Data Type:", cur.Type().Name())
}
}
if dev.TemplateDebug {
fmt.Println("Out Value:", out)
fmt.Println("Out Kind:", cur.Kind())
fmt.Println("Out Type:", cur.Type().Name())
}
for _, varItem := range c.varList {
if strings.HasPrefix(out, varItem.Destination) {
out = strings.Replace(out, varItem.Destination, varItem.Name, 1)
}
}
if dev.TemplateDebug {
fmt.Println("Out Value:", out)
fmt.Println("Out Kind:", cur.Kind())
fmt.Println("Out Type:", cur.Type().Name())
}
_, ok := c.stats[out]
if ok {
c.stats[out]++
} else {
c.stats[out] = 1
}
return out, cur
}
func (c *CTemplateSet) compileBoolsub(varname string, varholder string, templateName string, val reflect.Value) string {
if dev.TemplateDebug {
fmt.Println("in compileBoolsub")
}
out, val := c.compileIfVarsub(varname, varholder, templateName, val)
// TODO: What if it's a pointer or an interface? I *think* we've got pointers handled somewhere, but not interfaces which we don't know the types of at compile time
switch val.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Float32, reflect.Float64:
out += " > 0"
case reflect.Bool: // Do nothing
case reflect.String:
out += " != \"\""
case reflect.Slice, reflect.Map:
out = "len(" + out + ") != 0"
default:
fmt.Println("Variable Name:", varname)
fmt.Println("Variable Holder:", varholder)
fmt.Println("Variable Kind:", val.Kind())
panic("I don't know what this variable's type is o.o\n")
}
return out
}
func (c *CTemplateSet) compileVarsub(varname string, val reflect.Value) string {
if dev.TemplateDebug {
fmt.Println("in compileVarsub")
}
for _, varItem := range c.varList {
if strings.HasPrefix(varname, varItem.Destination) {
varname = strings.Replace(varname, varItem.Destination, varItem.Name, 1)
}
}
_, ok := c.stats[varname]
if ok {
c.stats[varname]++
} else {
c.stats[varname] = 1
}
if val.Kind() == reflect.Interface {
val = val.Elem()
}
switch val.Kind() {
case reflect.Int:
c.importMap["strconv"] = "strconv"
return "w.Write([]byte(strconv.Itoa(" + varname + ")))\n"
case reflect.Bool:
return "if " + varname + " {\nw.Write([]byte(\"true\"))} else {\nw.Write([]byte(\"false\"))\n}\n"
case reflect.String:
if val.Type().Name() != "string" && !strings.HasPrefix(varname, "string(") {
return "w.Write([]byte(string(" + varname + ")))\n"
}
return "w.Write([]byte(" + varname + "))\n"
case reflect.Int64:
c.importMap["strconv"] = "strconv"
return "w.Write([]byte(strconv.FormatInt(" + varname + ", 10)))"
default:
if !val.IsValid() {
panic(varname + "^\n" + "Invalid value. Maybe, it doesn't exist?")
}
fmt.Println("Unknown Variable Name:", varname)
fmt.Println("Unknown Kind:", val.Kind())
fmt.Println("Unknown Type:", val.Type().Name())
panic("// I don't know what this variable's type is o.o\n")
}
}
func (c *CTemplateSet) compileSubtemplate(pvarholder string, pholdreflect reflect.Value, node *parse.TemplateNode) (out string) {
if dev.TemplateDebug {
fmt.Println("in compileSubtemplate")
fmt.Println("Template Node:", node.Name)
}
fname := strings.TrimSuffix(node.Name, filepath.Ext(node.Name))
varholder := "tmpl_" + fname + "_vars"
var holdreflect reflect.Value
if node.Pipe != nil {
for _, cmd := range node.Pipe.Cmds {
firstWord := cmd.Args[0]
switch firstWord.(type) {
case *parse.DotNode:
varholder = pvarholder
holdreflect = pholdreflect
break
case *parse.NilNode:
panic("Nil is not a command x.x")
default:
out = "var " + varholder + " := false\n"
out += c.compileCommand(cmd)
}
}
}
// TODO: Cascade errors back up the tree to the caller?
res, err := ioutil.ReadFile(c.dir + node.Name)
if err != nil {
log.Fatal(err)
}
content := string(res)
if config.MinifyTemplates {
content = minify(content)
}
tree := parse.New(node.Name, c.funcMap)
var treeSet = make(map[string]*parse.Tree)
tree, err = tree.Parse(content, "{{", "}}", treeSet, c.funcMap)
if err != nil {
log.Fatal(err)
}
c.tlist[fname] = tree
subtree := c.tlist[fname]
if dev.TemplateDebug {
fmt.Println("subtree.Root", subtree.Root)
}
c.localVars[fname] = make(map[string]VarItemReflect)
c.localVars[fname]["."] = VarItemReflect{".", varholder, holdreflect}
c.FragmentCursor[fname] = 0
treeLength := len(subtree.Root.Nodes)
for index, node := range subtree.Root.Nodes {
if dev.TemplateDebug {
fmt.Println("Node:", node.String())
}
c.previousNode = c.currentNode
c.currentNode = node.Type()
if treeLength != (index + 1) {
c.nextNode = subtree.Root.Nodes[index+1].Type()
}
out += c.compileSwitch(varholder, holdreflect, fname, node)
}
return out
}
func (c *CTemplateSet) compileCommand(*parse.CommandNode) (out string) {
panic("Uh oh! Something went wrong!")
}
// TODO: Write unit tests for this
func minify(data string) string {
data = strings.Replace(data, "\t", "", -1)
data = strings.Replace(data, "\v", "", -1)
data = strings.Replace(data, "\n", "", -1)
data = strings.Replace(data, "\r", "", -1)
data = strings.Replace(data, " ", " ", -1)
return data
}
// TODO: Strip comments
// TODO: Handle CSS nested in <style> tags?
// TODO: Write unit tests for this
func minifyHTML(data string) string {
return minify(data)
}
// TODO: Have static files use this
// TODO: Strip comments
// TODO: Convert the rgb()s to hex codes?
// TODO: Write unit tests for this
func minifyCSS(data string) string {
return minify(data)
}
// TODO: Convert this to three character hex strings whenever possible?
// TODO: Write unit tests for this
// nolint
func rgbToHexstr(red int, green int, blue int) string {
return strconv.FormatInt(int64(red), 16) + strconv.FormatInt(int64(green), 16) + strconv.FormatInt(int64(blue), 16)
}
/*
// TODO: Write unit tests for this
func hexstrToRgb(hexstr string) (red int, blue int, green int, err error) {
// Strip the # at the start
if hexstr[0] == '#' {
hexstr = strings.TrimPrefix(hexstr,"#")
}
if len(hexstr) != 3 && len(hexstr) != 6 {
return 0, 0, 0, errors.New("Hex colour codes may only be three or six characters long")
}
if len(hexstr) == 3 {
hexstr = hexstr[0] + hexstr[0] + hexstr[1] + hexstr[1] + hexstr[2] + hexstr[2]
}
}*/