first-cut use of config table

documize/api/convert/apidocumizecom/init.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"net/http"
 
+	"github.com/documize/community/documize/api/request"
 	"github.com/documize/community/wordsmith/environment"
 )
 
@@ -13,8 +14,8 @@ var endPoint = "https://api.documize.com"
 var token string
 
 func init() {
-	environment.GetString(&endPoint, "endpoint", false, "Documize end-point", nil)
+	environment.GetString(&endPoint, "endpoint", false, "Documize end-point", request.FlagFromDB)
-	environment.GetString(&token, "token", false, "Documize token", nil)
+	environment.GetString(&token, "token", false, "Documize token", request.FlagFromDB)
 }
 
 var transport = &http.Transport{

documize/api/convert/convert.go

@@ -2,12 +2,12 @@
 package convert
 
 import (
+	"errors"
 	"github.com/documize/community/documize/api/convert/excerpt"
 	"github.com/documize/community/documize/api/convert/html"
 	"github.com/documize/community/documize/api/plugins"
 	"github.com/documize/community/wordsmith/api"
 	"github.com/documize/community/wordsmith/utility"
-	"errors"
 
 	"golang.org/x/net/context"
 )

documize/api/endpoint/router.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/codegangsta/negroni"
 	"github.com/documize/community/documize/api/plugins"
+	"github.com/documize/community/documize/api/request"
 	"github.com/documize/community/documize/database"
 	"github.com/documize/community/documize/web"
 	"github.com/documize/community/wordsmith/environment"
@@ -25,10 +26,10 @@ const (
 var port, certFile, keyFile, forcePort2SSL string
 
 func init() {
-	environment.GetString(&certFile, "cert", false, "the cert.pem file used for https", nil)
+	environment.GetString(&certFile, "cert", false, "the cert.pem file used for https", request.FlagFromDB)
-	environment.GetString(&keyFile, "key", false, "the key.pem file used for https", nil)
+	environment.GetString(&keyFile, "key", false, "the key.pem file used for https", request.FlagFromDB)
-	environment.GetString(&port, "port", false, "http/https port number", nil)
+	environment.GetString(&port, "port", false, "http/https port number", request.FlagFromDB)
-	environment.GetString(&forcePort2SSL, "forcesslport", false, "redirect given http port number to TLS", nil)
+	environment.GetString(&forcePort2SSL, "forcesslport", false, "redirect given http port number to TLS", request.FlagFromDB)
 }
 
 var testHost string // used during automated testing

documize/api/mail/mailer.go

@@ -8,6 +8,7 @@ import (
 	"html/template"
 	"net/smtp"
 
+	"github.com/documize/community/documize/api/request"
 	"github.com/documize/community/documize/web"
 	"github.com/documize/community/wordsmith/environment"
 	"github.com/documize/community/wordsmith/log"
@@ -258,11 +259,11 @@ var creds struct{ SMTPuserid, SMTPpassword, SMTPhost, SMTPport, SMTPsender strin
 func init() {
 	creds.SMTPport = "587"                             // the default value for outgoing SMTP traffic
 	creds.SMTPsender = "Documize <hello@documize.com>" // TODO review as SAAS specific
-	environment.GetString(&creds.SMTPuserid, "smtpuserid", false, "SMTP username for outgoing email", nil)
+	environment.GetString(&creds.SMTPuserid, "smtpuserid", false, "SMTP username for outgoing email", request.FlagFromDB)
-	environment.GetString(&creds.SMTPpassword, "smtppassword", false, "SMTP password for outgoing email", nil)
+	environment.GetString(&creds.SMTPpassword, "smtppassword", false, "SMTP password for outgoing email", request.FlagFromDB)
-	environment.GetString(&creds.SMTPhost, "smtphost", false, "SMTP host for outgoing email", nil)
+	environment.GetString(&creds.SMTPhost, "smtphost", false, "SMTP host for outgoing email", request.FlagFromDB)
-	environment.GetString(&creds.SMTPport, "smtpport", false, "SMTP port for outgoing email", nil)
+	environment.GetString(&creds.SMTPport, "smtpport", false, "SMTP port for outgoing email", request.FlagFromDB)
-	environment.GetString(&creds.SMTPsender, "smtpsender", false, "SMTP sender's e-mail for outgoing email", nil)
+	environment.GetString(&creds.SMTPsender, "smtpsender", false, "SMTP sender's e-mail for outgoing email", request.FlagFromDB)
 }
 
 // Helper to return SMTP credentials

documize/api/mail/smtp.go

@@ -31,10 +31,10 @@ package mail
 
 import (
 	"bytes"
-	"github.com/documize/community/wordsmith/log"
 	"encoding/base64"
 	"errors"
 	"fmt"
+	"github.com/documize/community/wordsmith/log"
 	"io"
 	"mime"
 	"mime/multipart"

documize/api/plugins/glick.go

@@ -10,6 +10,7 @@ import (
 	"github.com/documize/community/documize/api/convert/documizeapi"
 	"github.com/documize/community/documize/api/convert/html"
 	"github.com/documize/community/documize/api/convert/md"
+	"github.com/documize/community/documize/api/request"
 	"github.com/documize/community/wordsmith/api"
 	"github.com/documize/community/wordsmith/environment"
 	"github.com/documize/community/wordsmith/log"
@@ -22,9 +23,9 @@ var insecure = "false"
 
 func init() {
 	environment.GetString(&PluginFile, "plugin", false,
-		"the JSON file describing plugins, default 'plugin.json'", nil)
+		"the JSON file describing plugins, default 'plugin.json' set to 'PLUGIN' to configure from database settings", request.FlagFromDB)
 	environment.GetString(&insecure, "insecure", false,
-		"if 'true' allow https endpoints with invalid certificates (only for testing)", nil)
+		"if 'true' allow https endpoints with invalid certificates (only for testing)", request.FlagFromDB)
 }
 
 type infoLog struct{}
@@ -98,13 +99,17 @@ func LibSetup() error {
 		return err
 	}
 
-	json, err := ioutil.ReadFile(PluginFile)
+	var json = make([]byte, 0)
+	if PluginFile == "PLUGIN" {
+		json = []byte(request.ConfigString(PluginFile, ""))
+	} else {
+		json, err = ioutil.ReadFile(PluginFile)
 		if err != nil {
 			log.Info("Plugin file '" + PluginFile + "' not found, using no plugins")
 			json = []byte(" [ ] \n")
 			err = nil
 		}
-
+	}
 	err = Lib.Configure(json)
 	if err != nil {
 		return err

documize/api/request/config.go

@@ -0,0 +1,54 @@
+package request
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/documize/community/wordsmith/environment"
+	"github.com/documize/community/wordsmith/log"
+	"github.com/documize/community/wordsmith/utility"
+)
+
+// FlagFromDB overrides the value in *target if it is set in the database configuration JSON.
+// Function signiture must map that in environment
+func FlagFromDB(target *string, name string) bool {
+	value := ConfigString(environment.Prefix, name)
+	//fmt.Println("DEBUG FlagFromDB " + value)
+	if value != `""` && value != "" {
+		*target = strings.TrimPrefix(strings.TrimSuffix(value, `"`), `"`)
+		return true
+	}
+	return false
+}
+
+// ConfigString fetches a configuration JSON element from the config table.
+func ConfigString(area, path string) (ret string) {
+	if path != "" {
+		path = "." + path
+	}
+	sql := `SELECT JSON_EXTRACT(details,'$` + path + `') AS item FROM config WHERE area = '` + area + `';`
+
+	stmt, err := Db.Preparex(sql)
+	defer utility.Close(stmt)
+
+	if err != nil {
+		log.Error(fmt.Sprintf("Unable to prepare select for ConfigString: %s", sql), err)
+		return ""
+	}
+
+	var item = make([]uint8, 0)
+
+	err = stmt.Get(&item)
+
+	if err != nil {
+		//log.Error(fmt.Sprintf("Unable to execute select for ConfigString: %s", sql), err)
+		return ""
+	}
+
+	if len(item) > 1 {
+		ret = string(item)
+	}
+
+	//fmt.Println("DEBUG ConfigString " + sql + " => " + ret)
+	return ret
+}

documize/api/request/init.go

@@ -38,7 +38,7 @@ func init() {
 
 	environment.GetString(&connectionString, "db", true,
 		`"username:password@protocol(hostname:port)/databasename" for example "fred:bloggs@tcp(localhost:3306)/documize"`,
-		func() {
+		func(*string, string) bool {
 			Db, err = sqlx.Open("mysql", stdConn(connectionString))
 
 			if err != nil {
@@ -65,6 +65,7 @@ func init() {
 				log.Info("database.Check(Db) !OK, going into setup mode")
 			}
 
+			return false // value not changed
 		})
 }
 

documize/database/scripts/migrate/migrate-00002.sql

@@ -0,0 +1,7 @@
+DROP TABLE IF EXISTS `config`;
+
+CREATE TABLE IF NOT EXISTS  `config` (
+	`area` CHAR(16) NOT NULL,
+	`details` JSON,
+	UNIQUE INDEX `idx_config_area` (`area` ASC) ) ;
+    

documize/documize.go

@@ -10,7 +10,7 @@ import (
 )
 
 func main() {
-	environment.Parse()
+	environment.Parse("db")         // process the db value first
 	ready := make(chan struct{}, 1) // channel is used for testing
 
 	endpoint.Serve(ready)

documize/web/web.go

@@ -33,7 +33,7 @@ var SiteInfo struct {
 }
 
 func init() {
-	environment.GetString(&SiteMode, "offline", false, "set to '1' for OFFLINE mode", nil)
+	environment.GetString(&SiteMode, "offline", false, "set to '1' for OFFLINE mode", nil) // no sense overriding this setting from the DB
 	SiteInfo.DBhash = util.GenerateRandomPassword()                                        // do this only once
 }
 

wordsmith/environment/environment.go

@@ -10,11 +10,14 @@ import (
 	"strings"
 )
 
+// CallbackT is the type signature of the callback function of GetString().
+type CallbackT func(*string, string) bool
+
 type varT struct {
 	target              *string
 	name, setter, value string
 	required            bool
-	callback            func()
+	callback            CallbackT
 }
 
 type varsT struct {
@@ -44,7 +47,7 @@ const Prefix = "DOCUMIZE"
 const goInit = "(default)"
 
 // GetString sets-up the flag for later use, it must be called before ParseOK(), usually in an init().
-func GetString(target *string, name string, required bool, usage string, callback func()) {
+func GetString(target *string, name string, required bool, usage string, callback CallbackT) {
 	name = strings.ToLower(strings.TrimSpace(name))
 	setter := Prefix + strings.ToUpper(name)
 	value := os.Getenv(setter)
@@ -59,22 +62,29 @@ func GetString(target *string, name string, required bool, usage string, callbac
 // Parse calls flag.Parse() then checks that the required environment variables are all set.
 // It should be the first thing called by any main() that uses this library.
 // If all the required variables are not present, it prints an error and calls os.Exit(2) like flag.Parse().
-func Parse() {
+func Parse(doFirst string) {
 	flag.Parse()
 	sort.Sort(&vars)
+	for pass := 1; pass <= 2; pass++ {
 		for vi, v := range vars.vv {
+			if (pass == 1 && v.name == doFirst) || (pass == 2 && v.name != doFirst) {
 				typ := "Optional"
 				if v.value != *(v.target) || (v.value != "" && *(v.target) == "") {
 					vars.vv[vi].setter = "-" + v.name // v is a local copy, not the underlying data
 				}
+				if v.callback != nil {
+					if v.callback(v.target, v.name) {
+						vars.vv[vi].setter = "setting:" + v.name // v is a local copy, not the underlying data
+					}
+				}
 				if v.required {
 					if *(v.target) == "" {
 						fmt.Fprintln(os.Stderr)
 						fmt.Fprintln(os.Stderr, "In order to run", os.Args[0], "the following must be provided:")
 						for _, vv := range vars.vv {
 							if vv.required {
-						fmt.Fprintf(os.Stderr, "* setting from environment variable '%s' or flag '-%s', current value: '%s' set by '%s'\n",
+								fmt.Fprintf(os.Stderr, "* setting from environment variable '%s' or flag '-%s' or an application setting '%s', current value: '%s' set by '%s'\n",
-							Prefix+strings.ToUpper(vv.name), vv.name, *(vv.target), vv.setter)
+									Prefix+strings.ToUpper(vv.name), vv.name, vv.name, *(vv.target), vv.setter)
 							}
 						}
 						fmt.Fprintln(os.Stderr)
@@ -84,12 +94,11 @@ func Parse() {
 					}
 					typ = "Required"
 				}
-		if *(v.target) != "" && v.setter != goInit {
+				if *(v.target) != "" && vars.vv[vi].setter != goInit {
 					fmt.Fprintf(os.Stdout, "%s setting from '%s' is: '%s'\n",
-				typ, v.setter, *(v.target))
+						typ, vars.vv[vi].setter, *(v.target))
-		}
+				}
-		if v.callback != nil {
+			}
-			v.callback()
 		}
 	}
 }

wordsmith/log/logger.go

@@ -20,8 +20,9 @@ func init() {
 	log.SetLevel(log.DebugLevel)
 	env.GetString(&environment, "log", false,
 		"system being logged e.g. 'PRODUCTION'",
-		func() {
+		func(*string, string) bool {
 			log.Infoln(environment + " environment logging enabled")
+			return false
 		})
 }