diff options
Diffstat (limited to 'sort.go')
| -rw-r--r-- | sort.go | 203 |
1 files changed, 203 insertions, 0 deletions
@@ -0,0 +1,203 @@ +package main + +import ( + "fmt" + "io" +) + +func headerComment(w io.Writer) { + fmt.Fprintln(w, "") + fmt.Fprintln(w, "// this file was autogenerated with autogenpb") + fmt.Fprintln(w, "//") + fmt.Fprintln(w, "// you might be able to use it on simple, strictly defined protobuf files") + fmt.Fprintln(w, "//") + fmt.Fprintln(w, "// go install go.wit.com/apps/autogenpb@latest") + fmt.Fprintln(w, "") +} + +func header(w io.Writer, names map[string]string) { + fmt.Fprintln(w, "package "+names["package"]) + headerComment(w) + fmt.Fprintln(w, "import (") + fmt.Fprintln(w, " \"fmt\"") + fmt.Fprintln(w, " \"os\"") + fmt.Fprintln(w, " \"sort\"") + fmt.Fprintln(w, " \"sync\"") + fmt.Fprintln(w, ")") + fmt.Fprintln(w, "") +} + +func syncLock(w io.Writer, names map[string]string) { + fmt.Fprintln(w, "// bad global lock until I figure out some other plan") + fmt.Fprintln(w, "// redo/fix protoc-gen-go 1.35 and do it there?") + fmt.Fprintln(w, "// sync.RWMutex or sync.Mutex?") + fmt.Fprintln(w, "var "+names["lock"]+" sync.RWMutex") + fmt.Fprintln(w, "") +} + +func iterTop(w io.Writer, names map[string]string) { + fmt.Fprintln(w, "type "+names["Base"]+"Iterator struct {") + fmt.Fprintln(w, " sync.RWMutex") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " packs []*"+names["Base"]) + fmt.Fprintln(w, " index int") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") + fmt.Fprintln(w, "// New"+names["Base"]+"Iterator initializes a new iterator.") + fmt.Fprintln(w, "func New"+names["Base"]+"Iterator(packs []*"+names["Base"]+") *"+names["Base"]+"Iterator {") + fmt.Fprintln(w, " return &"+names["Base"]+"Iterator{packs: packs}") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") + fmt.Fprintln(w, "// Scan moves to the next element and returns false if there are no more packs.") + fmt.Fprintln(w, "// Use Scan() in a loop, similar to a while loop") + fmt.Fprintln(w, "//") + fmt.Fprintln(w, "// for iterator.Scan() ") + fmt.Fprintln(w, "// d := iterator.Next(") + fmt.Fprintln(w, "// fmt.Println(\"found UUID:\", d.Uuid") + fmt.Fprintln(w, "// }") + fmt.Fprintln(w, "func (it *"+names["Base"]+"Iterator) Scan() bool {") + fmt.Fprintln(w, " if it.index >= len(it.packs) {") + fmt.Fprintln(w, " return false") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, " it.index++") + fmt.Fprintln(w, " return true") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") +} + +func iterNext(w io.Writer, names map[string]string) { + fmt.Fprintln(w, "// Next() returns the next thing in the array") + fmt.Fprintln(w, "func (it *"+names["Base"]+"Iterator) Next() *"+names["Base"]+" {") + fmt.Fprintln(w, " if it.packs[it.index-1] == nil {") + fmt.Fprintln(w, " for i, d := range it.packs {") + fmt.Fprintln(w, " fmt.Println(\"i =\", i, d)") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, " fmt.Println(\"protobuf autogenpb sort error len =\", len(it.packs))") + fmt.Fprintln(w, " fmt.Println(\"protobuf autogenpb sort error next == nil\", it.index, it.index-1)") + fmt.Fprintln(w, " os.Exit(-1)") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, " return it.packs[it.index-1]") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") +} + +func iterSort(w io.Writer, names map[string]string) { + fmt.Fprintln(w, "func (all *"+names["Bases"]+") All() *"+names["Base"]+"Iterator {") + fmt.Fprintln(w, " "+names["base"]+"Pointers := all.selectAll"+names["Base"]+"()") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " iterator := New"+names["Base"]+"Iterator("+names["base"]+"Pointers)") + fmt.Fprintln(w, " return iterator") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") + fmt.Fprintln(w, "func (all *"+names["Bases"]+") Sort"+names["sortBy"]+"() *"+names["Base"]+"Iterator {") + fmt.Fprintln(w, " packs := all.selectAll"+names["Base"]+"()") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " sort.Sort("+names["Base"]+""+names["sortBy"]+"(packs))") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " iterator := New"+names["Base"]+"Iterator(packs)") + fmt.Fprintln(w, " return iterator") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") + fmt.Fprintln(w, "func (all *"+names["Bases"]+") Len() int {") + fmt.Fprintln(w, " "+names["lock"]+".RLock()") + fmt.Fprintln(w, " defer "+names["lock"]+".RUnlock()") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " return len(all."+names["Bases"]+")") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") +} + +func iterEnd(w io.Writer, names map[string]string) { + fmt.Fprintln(w, "type "+names["Base"]+""+names["sortBy"]+" []*"+names["Base"]+"") + fmt.Fprintln(w, "") + fmt.Fprintln(w, "func (a "+names["Base"]+""+names["sortBy"]+") Len() int { return len(a) }") + fmt.Fprintln(w, "func (a "+names["Base"]+""+names["sortBy"]+") Less(i, j int) bool { return a[i]."+names["sortKey"]+" < a[j]."+names["sortKey"]+" }") + fmt.Fprintln(w, "func (a "+names["Base"]+""+names["sortBy"]+") Swap(i, j int) { a[i], a[j] = a[j], a[i] }") + fmt.Fprintln(w, "") + fmt.Fprintln(w, "// safely returns a slice of pointers to the "+names["Base"]+" protobufs") + fmt.Fprintln(w, "func (all *"+names["Bases"]+") selectAll"+names["Base"]+"() []*"+names["Base"]+" {") + fmt.Fprintln(w, " "+names["lock"]+".RLock()") + fmt.Fprintln(w, " defer "+names["lock"]+".RUnlock()") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " // Create a new slice to hold pointers to each "+names["Base"]+"") + fmt.Fprintln(w, " var aStuff []*"+names["Base"]+"") + fmt.Fprintln(w, " aStuff = make([]*"+names["Base"]+", len(all."+names["Bases"]+"))") + fmt.Fprintln(w, " for i, p := range all."+names["Bases"]+" {") + fmt.Fprintln(w, " aStuff[i] = p // Copy pointers for safe iteration") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " return aStuff") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") +} + +func iterAppend(w io.Writer, names map[string]string) { + if names["append"] == "" { + fmt.Fprintln(w, "// does not enforce any unique fields") + } else { + fmt.Fprintln(w, "// enforces "+names["append"]+" is unique") + } + if names["append"] == "" { + fmt.Fprintln(w, "func (all *"+names["Bases"]+") Append(newP *"+names["Base"]+") bool {") + } else { + // fmt.Fprintln(w, "func (all *"+names["Bases"]+") Append(newP *"+names["Base"]+") bool { // todo: make unique name here") + fmt.Fprintln(w, "func (all *"+names["Bases"]+") AppendUnique"+names["append"]+"(newP *"+names["Base"]+") bool {") + } + fmt.Fprintln(w, " "+names["lock"]+".Lock()") + fmt.Fprintln(w, " defer "+names["lock"]+".Unlock()") + fmt.Fprintln(w, "") + if names["append"] != "" { + fmt.Fprintln(w, " for _, p := range all."+names["Bases"]+" {") + fmt.Fprintln(w, " if p."+names["append"]+" == newP."+names["append"]+" {") + fmt.Fprintln(w, " return false") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, "") + } + fmt.Fprintln(w, " all."+names["Bases"]+" = append(all."+names["Bases"]+", newP)") + fmt.Fprintln(w, " return true") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") +} + +func iterReplace(w io.Writer, names map[string]string) { + if names["append"] == "" { + // can't continue without a key field + } + fmt.Fprintln(w, "// enforces "+names["append"]+" is unique") + fmt.Fprintln(w, "func (all *"+names["Bases"]+") Replace"+names["append"]+"(newP *"+names["Base"]+") bool { // todo: make unique name here") + + fmt.Fprintln(w, " "+names["lock"]+".Lock()") + fmt.Fprintln(w, " defer "+names["lock"]+".Unlock()") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " for _, p := range all."+names["Bases"]+" {") + fmt.Fprintln(w, " if p."+names["append"]+" == newP."+names["append"]+" {") + fmt.Fprintln(w, " return false") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " all."+names["Bases"]+" = append(all."+names["Bases"]+", newP)") + fmt.Fprintln(w, " return true") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") +} + +func iterDelete(w io.Writer, names map[string]string) { + fmt.Fprintln(w, "func (all *"+names["Bases"]+") DeleteBy"+names["append"]+"(s string) *"+names["Base"]+" {") + fmt.Fprintln(w, " "+names["lock"]+".Lock()") + fmt.Fprintln(w, " defer "+names["lock"]+".Unlock()") + fmt.Fprintln(w, "") + fmt.Fprintln(w, " var newr "+names["Base"]) + fmt.Fprintln(w, "") + fmt.Fprintln(w, " for i, _ := range all."+names["Bases"]+" {") + fmt.Fprintln(w, " if all."+names["Bases"]+"[i]."+names["append"]+" == s {") + fmt.Fprintln(w, " newr = *all."+names["Bases"]+"[i]") + fmt.Fprintln(w, " all."+names["Bases"]+"[i] = all."+names["Bases"]+"[len(all."+names["Bases"]+")-1]") + fmt.Fprintln(w, " all."+names["Bases"]+" = all."+names["Bases"]+"[:len(all."+names["Bases"]+")-1]") + fmt.Fprintln(w, " return &newr") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, " }") + fmt.Fprintln(w, " return nil") + fmt.Fprintln(w, "}") + fmt.Fprintln(w, "") +} |