mirror of
https://github.com/aclindsa/moneygo.git
synced 2025-07-03 12:48:38 -04:00
First pass at reorganizing go code into sub-packages
This commit is contained in:
354
internal/handlers/reports.go
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354
internal/handlers/reports.go
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@ -0,0 +1,354 @@
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package handlers
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"github.com/yuin/gopher-lua"
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"log"
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"net/http"
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"regexp"
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"strings"
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"time"
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)
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var reportTabulationRE *regexp.Regexp
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func init() {
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reportTabulationRE = regexp.MustCompile(`^/report/[0-9]+/tabulation/?$`)
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}
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//type and value to store user in lua's Context
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type key int
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const (
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userContextKey key = iota
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accountsContextKey
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securitiesContextKey
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balanceContextKey
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dbContextKey
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)
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const luaTimeoutSeconds time.Duration = 30 // maximum time a lua request can run for
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type Report struct {
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ReportId int64
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UserId int64
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Name string
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Lua string
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}
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func (r *Report) Write(w http.ResponseWriter) error {
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enc := json.NewEncoder(w)
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return enc.Encode(r)
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}
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func (r *Report) Read(json_str string) error {
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dec := json.NewDecoder(strings.NewReader(json_str))
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return dec.Decode(r)
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}
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type ReportList struct {
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Reports *[]Report `json:"reports"`
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}
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func (rl *ReportList) Write(w http.ResponseWriter) error {
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enc := json.NewEncoder(w)
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return enc.Encode(rl)
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}
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type Series struct {
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Values []float64
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Series map[string]*Series
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}
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type Tabulation struct {
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ReportId int64
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Title string
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Subtitle string
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Units string
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Labels []string
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Series map[string]*Series
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}
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func (r *Tabulation) Write(w http.ResponseWriter) error {
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enc := json.NewEncoder(w)
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return enc.Encode(r)
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}
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func GetReport(db *DB, reportid int64, userid int64) (*Report, error) {
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var r Report
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err := db.SelectOne(&r, "SELECT * from reports where UserId=? AND ReportId=?", userid, reportid)
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if err != nil {
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return nil, err
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}
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return &r, nil
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}
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func GetReports(db *DB, userid int64) (*[]Report, error) {
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var reports []Report
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_, err := db.Select(&reports, "SELECT * from reports where UserId=?", userid)
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if err != nil {
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return nil, err
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}
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return &reports, nil
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}
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func InsertReport(db *DB, r *Report) error {
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err := db.Insert(r)
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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 UpdateReport(db *DB, r *Report) error {
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count, err := db.Update(r)
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if err != nil {
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return err
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}
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if count != 1 {
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return errors.New("Updated more than one report")
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}
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return nil
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}
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func DeleteReport(db *DB, r *Report) error {
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count, err := db.Delete(r)
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if err != nil {
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return err
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}
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if count != 1 {
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return errors.New("Deleted more than one report")
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}
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return nil
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}
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func runReport(db *DB, user *User, report *Report) (*Tabulation, error) {
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// Create a new LState without opening the default libs for security
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L := lua.NewState(lua.Options{SkipOpenLibs: true})
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defer L.Close()
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// Create a new context holding the current user with a timeout
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ctx := context.WithValue(context.Background(), userContextKey, user)
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ctx = context.WithValue(ctx, dbContextKey, db)
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ctx, cancel := context.WithTimeout(ctx, luaTimeoutSeconds*time.Second)
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defer cancel()
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L.SetContext(ctx)
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for _, pair := range []struct {
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n string
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f lua.LGFunction
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}{
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{lua.LoadLibName, lua.OpenPackage}, // Must be first
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{lua.BaseLibName, lua.OpenBase},
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{lua.TabLibName, lua.OpenTable},
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{lua.StringLibName, lua.OpenString},
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{lua.MathLibName, lua.OpenMath},
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} {
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if err := L.CallByParam(lua.P{
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Fn: L.NewFunction(pair.f),
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NRet: 0,
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Protect: true,
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}, lua.LString(pair.n)); err != nil {
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return nil, errors.New("Error initializing Lua packages")
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}
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}
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luaRegisterAccounts(L)
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luaRegisterSecurities(L)
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luaRegisterBalances(L)
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luaRegisterDates(L)
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luaRegisterTabulations(L)
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luaRegisterPrices(L)
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err := L.DoString(report.Lua)
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if err != nil {
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return nil, err
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}
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if err := L.CallByParam(lua.P{
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Fn: L.GetGlobal("generate"),
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NRet: 1,
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Protect: true,
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}); err != nil {
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return nil, err
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}
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value := L.Get(-1)
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if ud, ok := value.(*lua.LUserData); ok {
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if tabulation, ok := ud.Value.(*Tabulation); ok {
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return tabulation, nil
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} else {
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return nil, fmt.Errorf("generate() for %s (Id: %d) didn't return a tabulation", report.Name, report.ReportId)
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}
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} else {
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return nil, fmt.Errorf("generate() for %s (Id: %d) didn't even return LUserData", report.Name, report.ReportId)
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}
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}
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func ReportTabulationHandler(db *DB, w http.ResponseWriter, r *http.Request, user *User, reportid int64) {
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report, err := GetReport(db, reportid, user.UserId)
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if err != nil {
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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tabulation, err := runReport(db, user, report)
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if err != nil {
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// TODO handle different failure cases differently
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log.Print("runReport returned:", err)
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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tabulation.ReportId = reportid
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err = tabulation.Write(w)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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}
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func ReportHandler(w http.ResponseWriter, r *http.Request, db *DB) {
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user, err := GetUserFromSession(db, r)
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if err != nil {
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WriteError(w, 1 /*Not Signed In*/)
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return
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}
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if r.Method == "POST" {
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report_json := r.PostFormValue("report")
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if report_json == "" {
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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var report Report
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err := report.Read(report_json)
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if err != nil {
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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report.ReportId = -1
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report.UserId = user.UserId
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err = InsertReport(db, &report)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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w.WriteHeader(201 /*Created*/)
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err = report.Write(w)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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} else if r.Method == "GET" {
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if reportTabulationRE.MatchString(r.URL.Path) {
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var reportid int64
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n, err := GetURLPieces(r.URL.Path, "/report/%d/tabulation", &reportid)
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if err != nil || n != 1 {
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WriteError(w, 999 /*InternalError*/)
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log.Print(err)
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return
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}
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ReportTabulationHandler(db, w, r, user, reportid)
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return
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}
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var reportid int64
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n, err := GetURLPieces(r.URL.Path, "/report/%d", &reportid)
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if err != nil || n != 1 {
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//Return all Reports
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var rl ReportList
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reports, err := GetReports(db, user.UserId)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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rl.Reports = reports
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err = (&rl).Write(w)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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} else {
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// Return Report with this Id
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report, err := GetReport(db, reportid, user.UserId)
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if err != nil {
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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err = report.Write(w)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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}
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} else {
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reportid, err := GetURLID(r.URL.Path)
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if err != nil {
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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if r.Method == "PUT" {
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report_json := r.PostFormValue("report")
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if report_json == "" {
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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var report Report
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err := report.Read(report_json)
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if err != nil || report.ReportId != reportid {
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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report.UserId = user.UserId
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err = UpdateReport(db, &report)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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err = report.Write(w)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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} else if r.Method == "DELETE" {
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report, err := GetReport(db, reportid, user.UserId)
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if err != nil {
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WriteError(w, 3 /*Invalid Request*/)
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return
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}
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err = DeleteReport(db, report)
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if err != nil {
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WriteError(w, 999 /*Internal Error*/)
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log.Print(err)
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return
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}
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WriteSuccess(w)
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}
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}
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}
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