factoring out a lot of string constant values

database/post.go

@@ -254,10 +254,10 @@ func (p *PostHeader) Text(ctx context.Context) (string, error) {
 
 // Link returns a link string to this post.
 func (p *PostHeader) Link(ctx context.Context, commid int32, scope string) (string, error) {
-	if scope == "topic" {
+	if scope == PLSCOPE_TOPIC {
 		return fmt.Sprintf("%d", p.Num), nil
 	}
-	if scope == "conference" || scope == "community" || scope == "global" {
+	if scope == PLSCOPE_CONFERENCE || scope == PLSCOPE_COMMUNITY || scope == PLSCOPE_GLOBAL {
 		topic, err := AmGetTopic(ctx, p.TopicId)
 		if err != nil {
 			return "", err
@@ -720,55 +720,55 @@ func decodeSearchScope(ctx context.Context, scopeValues []any) (string, *Communi
 		}
 		if thisComm, ok := scopeValues[i].(*Community); ok {
 			if myComm != nil {
-				return "error", nil, nil, nil, errors.New("cannot specify multiple communities")
+				return PLSCOPE_ERROR, nil, nil, nil, errors.New("cannot specify multiple communities")
 			}
 			myComm = thisComm
 			continue
 		}
 		if thisConf, ok := scopeValues[i].(*Conference); ok {
 			if myConf != nil {
-				return "error", nil, nil, nil, errors.New("cannot specify multiple conferences")
+				return PLSCOPE_ERROR, nil, nil, nil, errors.New("cannot specify multiple conferences")
 			}
 			myConf = thisConf
 			continue
 		}
 		if thisTopic, ok := scopeValues[i].(*Topic); ok {
 			if myTopic != nil {
-				return "error", nil, nil, nil, errors.New("cannot specify multiple topics")
+				return PLSCOPE_ERROR, nil, nil, nil, errors.New("cannot specify multiple topics")
 			}
 			myTopic = thisTopic
 			continue
 		}
-		return "error", nil, nil, nil, errors.New("invalid item specified in scope")
+		return PLSCOPE_ERROR, nil, nil, nil, errors.New("invalid item specified in scope")
 	}
 
 	// Based on which slots are full, determine the scope. Also error-check relations between the specified slots.
 	if myComm == nil {
 		if myConf != nil || myTopic != nil {
-			return "error", nil, nil, nil, errors.New("conference/topic specified without community")
+			return PLSCOPE_ERROR, nil, nil, nil, errors.New("conference/topic specified without community")
 		}
-		return "global", nil, nil, nil, nil
+		return PLSCOPE_GLOBAL, nil, nil, nil, nil
 	}
 	if myConf == nil {
 		if myTopic != nil {
-			return "error", nil, nil, nil, errors.New("topic specified without conference")
+			return PLSCOPE_ERROR, nil, nil, nil, errors.New("topic specified without conference")
 		}
-		return "community", myComm, nil, nil, nil
+		return PLSCOPE_COMMUNITY, myComm, nil, nil, nil
 	}
 	f, err := myConf.InCommunity(ctx, myComm)
 	if err != nil {
-		return "error", nil, nil, nil, err
+		return PLSCOPE_ERROR, nil, nil, nil, err
 	}
 	if !f {
-		return "error", nil, nil, nil, errors.New("community does not contain conference")
+		return PLSCOPE_ERROR, nil, nil, nil, errors.New("community does not contain conference")
 	}
 	if myTopic == nil {
-		return "conference", myComm, myConf, nil, nil
+		return PLSCOPE_CONFERENCE, myComm, myConf, nil, nil
 	}
 	if myTopic.ConfId != myConf.ConfId {
-		return "error", nil, nil, nil, errors.New("conference does not contain topic")
+		return PLSCOPE_ERROR, nil, nil, nil, errors.New("conference does not contain topic")
 	}
-	return "topic", myComm, myConf, myTopic, nil
+	return PLSCOPE_TOPIC, myComm, myConf, myTopic, nil
 }
 
 /* AmSearchPosts finds posts by using full text search on their contents.
@@ -794,7 +794,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 	}
 
 	// Get the proper service index to match against the community services.
-	confService, err := AmGetServiceIndex("community", "Conference")
+	confService, err := AmGetServiceIndex(AM_DOMAIN_COMMUNITY, AM_SVC_CONFERENCE)
 	if err != nil {
 		return nil, -1, err
 	}
@@ -802,7 +802,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 	// Get the count of matching posts.
 	var count int
 	switch scope {
-	case "global":
+	case PLSCOPE_GLOBAL:
 		err = amdb.GetContext(ctx, &count, `SELECT COUNT(*)
 			FROM communities q JOIN commtoconf s ON s.commid = q.commid JOIN confs c ON c.confid = s.confid
 			JOIN commmember m ON m.commid = q.commid JOIN users u ON u.uid = m.uid JOIN commftrs f ON f.commid = q.commid
@@ -810,7 +810,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 			LEFT JOIN confmember x ON (c.confid = x.confid AND u.uid = x.uid)
 			WHERE u.uid = ? AND f.ftr_code = ? AND GREATEST(u.base_lvl,m.granted_lvl,s.granted_lvl,COALESCE(x.granted_lvl,0)) >= c.read_lvl
 			AND p.scribble_uid IS NULL AND MATCH(d.data) AGAINST (?)`, u.Uid, confService, searchTerms)
-	case "community":
+	case PLSCOPE_COMMUNITY:
 		err = amdb.GetContext(ctx, &count, `SELECT COUNT(*)
 			FROM communities q JOIN commtoconf s ON s.commid = q.commid JOIN confs c ON c.confid = s.confid
 			JOIN commmember m ON m.commid = q.commid JOIN users u ON u.uid = m.uid JOIN commftrs f ON f.commid = q.commid
@@ -818,7 +818,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 			LEFT JOIN confmember x ON (c.confid = x.confid AND u.uid = x.uid)
 			WHERE u.uid = ? AND f.ftr_code = ? AND GREATEST(u.base_lvl,m.granted_lvl,s.granted_lvl,COALESCE(x.granted_lvl,0)) >= c.read_lvl
 			AND q.commid = ? AND p.scribble_uid IS NULL AND MATCH(d.data) AGAINST (?)`, u.Uid, confService, comm.Id, searchTerms)
-	case "conference":
+	case PLSCOPE_CONFERENCE:
 		err = amdb.GetContext(ctx, &count, `SELECT COUNT(*)
 			FROM communities q JOIN commtoconf s ON s.commid = q.commid JOIN confs c ON c.confid = s.confid
 			JOIN commmember m ON m.commid = q.commid JOIN users u ON u.uid = m.uid JOIN commftrs f ON f.commid = q.commid
@@ -826,7 +826,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 			LEFT JOIN confmember x ON (c.confid = x.confid AND u.uid = x.uid)
 			WHERE u.uid = ? AND f.ftr_code = ? AND GREATEST(u.base_lvl,m.granted_lvl,s.granted_lvl,COALESCE(x.granted_lvl,0)) >= c.read_lvl
 			AND q.commid = ? AND c.confid = ? AND p.scribble_uid IS NULL AND MATCH(d.data) AGAINST (?)`, u.Uid, confService, comm.Id, conf.ConfId, searchTerms)
-	case "topic":
+	case PLSCOPE_TOPIC:
 		err = amdb.GetContext(ctx, &count, `SELECT COUNT(*)
 			FROM communities q JOIN commtoconf s ON s.commid = q.commid JOIN confs c ON c.confid = s.confid
 			JOIN commmember m ON m.commid = q.commid JOIN users u ON u.uid = m.uid JOIN commftrs f ON f.commid = q.commid
@@ -844,7 +844,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 	// Get the matching posts themselves.
 	var rs *sql.Rows
 	switch scope {
-	case "global":
+	case PLSCOPE_GLOBAL:
 		rs, err = amdb.QueryContext(ctx, `SELECT q.commid, q.alias, c.confid, t.topicid, t.num, p.postid, p.num, u2.username, p.posted, p.linecount, d.data
 			FROM communities q JOIN commtoconf s ON s.commid = q.commid JOIN confs c ON c.confid = s.confid
 			JOIN commmember m ON m.commid = q.commid JOIN users u ON u.uid = m.uid JOIN commftrs f ON f.commid = q.commid
@@ -853,7 +853,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 			WHERE u.uid = ? AND f.ftr_code = ? AND GREATEST(u.base_lvl,m.granted_lvl,s.granted_lvl,COALESCE(x.granted_lvl,0)) >= c.read_lvl
 			AND p.scribble_uid IS NULL AND MATCH(d.data) AGAINST (?) ORDER BY q.commname, c.name, t.num, p.num
 			LIMIT ? OFFSET ?`, u.Uid, confService, searchTerms, max, offset)
-	case "community":
+	case PLSCOPE_COMMUNITY:
 		rs, err = amdb.QueryContext(ctx, `SELECT q.commid, q.alias, c.confid, t.topicid, t.num, p.postid, p.num, u2.username, p.posted, p.linecount, d.data
 			FROM communities q JOIN commtoconf s ON s.commid = q.commid JOIN confs c ON c.confid = s.confid
 			JOIN commmember m ON m.commid = q.commid JOIN users u ON u.uid = m.uid JOIN commftrs f ON f.commid = q.commid
@@ -862,7 +862,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 			WHERE u.uid = ? AND f.ftr_code = ? AND GREATEST(u.base_lvl,m.granted_lvl,s.granted_lvl,COALESCE(x.granted_lvl,0)) >= c.read_lvl
 			AND q.commid = ? AND p.scribble_uid IS NULL AND MATCH(d.data) AGAINST (?) ORDER BY q.commname, c.name, t.num, p.num
 			LIMIT ? OFFSET ?`, u.Uid, confService, comm.Id, searchTerms, max, offset)
-	case "conference":
+	case PLSCOPE_CONFERENCE:
 		rs, err = amdb.QueryContext(ctx, `SELECT q.commid, q.alias, c.confid, t.topicid, t.num, p.postid, p.num, u2.username, p.posted, p.linecount, d.data
 			FROM communities q JOIN commtoconf s ON s.commid = q.commid JOIN confs c ON c.confid = s.confid
 			JOIN commmember m ON m.commid = q.commid JOIN users u ON u.uid = m.uid JOIN commftrs f ON f.commid = q.commid
@@ -871,7 +871,7 @@ func AmSearchPosts(ctx context.Context, searchTerms string, u *User, offset, max
 			WHERE u.uid = ? AND f.ftr_code = ? AND GREATEST(u.base_lvl,m.granted_lvl,s.granted_lvl,COALESCE(x.granted_lvl,0)) >= c.read_lvl
 			AND q.commid = ? AND c.confid = ? AND p.scribble_uid IS NULL AND MATCH(d.data) AGAINST (?) ORDER BY q.commname, c.name, t.num, p.num
 			LIMIT ? OFFSET ?`, u.Uid, confService, comm.Id, conf.ConfId, searchTerms, max, offset)
-	case "topic":
+	case PLSCOPE_TOPIC:
 		rs, err = amdb.QueryContext(ctx, `SELECT q.commid, q.alias, c.confid, t.topicid, t.num, p.postid, p.num, u2.username, p.posted, p.linecount, d.data
 			FROM communities q JOIN commtoconf s ON s.commid = q.commid JOIN confs c ON c.confid = s.confid
 			JOIN commmember m ON m.commid = q.commid JOIN users u ON u.uid = m.uid JOIN commftrs f ON f.commid = q.commid

database/post_link.go

@@ -20,6 +20,25 @@ import (
 	"strings"
 )
 
+// Post link scopes.
+const (
+	PLSCOPE_GLOBAL     = "global"
+	PLSCOPE_COMMUNITY  = "community"
+	PLSCOPE_CONFERENCE = "conference"
+	PLSCOPE_TOPIC      = "topic"
+	PLSCOPE_ERROR      = "error"
+)
+
+// Post link classifications.
+const (
+	PLCLASS_COMMUNITY     = "community"
+	PLCLASS_CONFERENCE    = "conference"
+	PLCLASS_TOPIC         = "topic"
+	PLCLASS_POST          = "post"
+	PLCLASS_POSTRANGE     = "postrange"
+	PLCLASS_POSTOPENRANGE = "postopenrange"
+)
+
 // PostLinkData is the structure holding the decoded parts of the post link.
 type PostLinkData struct {
 	Community  string
@@ -121,53 +140,53 @@ func (d *PostLinkData) Classify() (string, string) {
 				if d.FirstPost == -1 {
 					return "", ""
 				} else if d.LastPost == -1 {
-					return "topic", "postopenrange"
+					return PLSCOPE_TOPIC, PLCLASS_POSTOPENRANGE
 				} else if d.LastPost == d.FirstPost {
-					return "topic", "post"
+					return PLSCOPE_TOPIC, PLCLASS_POST
 				} else {
-					return "topic", "postrange"
+					return PLSCOPE_TOPIC, PLCLASS_POSTRANGE
 				}
 			} else {
 				if d.FirstPost == -1 {
-					return "conference", "topic"
+					return PLSCOPE_CONFERENCE, PLCLASS_TOPIC
 				} else if d.LastPost == -1 {
-					return "conference", "postopenrange"
+					return PLSCOPE_CONFERENCE, PLCLASS_POSTOPENRANGE
 				} else if d.LastPost == d.FirstPost {
-					return "conference", "post"
+					return PLSCOPE_CONFERENCE, PLCLASS_POST
 				} else {
-					return "conference", "postrange"
+					return PLSCOPE_CONFERENCE, PLCLASS_POSTRANGE
 				}
 			}
 		} else {
 			if d.Topic == -1 {
-				return "community", "conference"
+				return PLSCOPE_COMMUNITY, PLCLASS_CONFERENCE
 			} else {
 				if d.FirstPost == -1 {
-					return "community", "topic"
+					return PLSCOPE_COMMUNITY, PLCLASS_TOPIC
 				} else if d.LastPost == -1 {
-					return "community", "postopenrange"
+					return PLSCOPE_COMMUNITY, PLCLASS_POSTOPENRANGE
 				} else if d.LastPost == d.FirstPost {
-					return "community", "post"
+					return PLSCOPE_COMMUNITY, PLCLASS_POST
 				} else {
-					return "community", "postrange"
+					return PLSCOPE_COMMUNITY, PLCLASS_POSTRANGE
 				}
 			}
 		}
 	} else {
 		if d.Conference == "" {
-			return "global", "community"
+			return PLSCOPE_GLOBAL, PLCLASS_COMMUNITY
 		} else {
 			if d.Topic == -1 {
-				return "global", "conference"
+				return PLSCOPE_GLOBAL, PLCLASS_CONFERENCE
 			} else {
 				if d.FirstPost == -1 {
-					return "global", "topic"
+					return PLSCOPE_GLOBAL, PLCLASS_TOPIC
 				} else if d.LastPost == -1 {
-					return "global", "postopenrange"
+					return PLSCOPE_GLOBAL, PLCLASS_POSTOPENRANGE
 				} else if d.LastPost == d.FirstPost {
-					return "global", "post"
+					return PLSCOPE_GLOBAL, PLCLASS_POST
 				} else {
-					return "global", "postrange"
+					return PLSCOPE_GLOBAL, PLCLASS_POSTRANGE
 				}
 			}
 		}
@@ -276,25 +295,25 @@ func AmDecodePostLink(data string) (*PostLinkData, error) {
 	if len(data) > maxLinkLength {
 		return nil, errors.New("post link string too long")
 	}
-	rc := PostLinkData{
+	rc := new(PostLinkData{
 		Community:  "",
 		Conference: "",
 		Topic:      -1,
 		FirstPost:  -1,
 		LastPost:   -1,
-	}
+	})
 
 	work := data
 	// First test: Bang
 	pos := strings.IndexByte(work, '!')
 	if pos > 0 {
-		err := validateCommunity(work[:pos], &rc)
+		err := validateCommunity(work[:pos], rc)
 		if err != nil {
 			return nil, err
 		}
 		work = work[pos+1:]
 		if len(work) == 0 {
-			return &rc, nil // community link
+			return rc, nil // community link
 		}
 	} else if pos == 0 {
 		return nil, errors.New("cannot have ! at beginning")
@@ -306,14 +325,14 @@ func AmDecodePostLink(data string) (*PostLinkData, error) {
 		// no dots in here, must be either "postlink" or "community!conference"
 		var err error
 		if rc.Community == "" {
-			err = decodePostRange(work, &rc)
+			err = decodePostRange(work, rc)
 		} else {
-			err = validateConference(work, &rc)
+			err = validateConference(work, rc)
 		}
 		if err != nil {
 			return nil, err
 		}
-		return &rc, nil
+		return rc, nil
 	}
 
 	// Peel off the initial substring before the dot.
@@ -324,19 +343,19 @@ func AmDecodePostLink(data string) (*PostLinkData, error) {
 		var err error
 		if rc.Community == "" {
 			// it's either "conference." or "topic." - try the latter first
-			err = decodeTopicNumber(confOrTopic, &rc)
+			err = decodeTopicNumber(confOrTopic, rc)
 			if err != nil {
 				// it's not a topic number, try it as a conference name
-				err = validateConference(confOrTopic, &rc)
+				err = validateConference(confOrTopic, rc)
 			}
 		} else {
 			// it was "community!conference."
-			err = validateConference(confOrTopic, &rc)
+			err = validateConference(confOrTopic, rc)
 		}
 		if err != nil {
 			return nil, err
 		}
-		return &rc, nil
+		return rc, nil
 	}
 
 	// Third test: Dot #2
@@ -347,38 +366,38 @@ func AmDecodePostLink(data string) (*PostLinkData, error) {
 		if rc.Community == "" {
 			// either "conference.topic" or "topic.posts"
 			isTopic := false
-			err = decodeTopicNumber(confOrTopic, &rc)
+			err = decodeTopicNumber(confOrTopic, rc)
 			if err != nil {
 				// it's "conference.topic"
-				err = validateConference(confOrTopic, &rc)
+				err = validateConference(confOrTopic, rc)
 				isTopic = true
 			}
 			if err == nil {
 				if isTopic {
-					err = decodeTopicNumber(work, &rc)
+					err = decodeTopicNumber(work, rc)
 				} else {
-					err = decodePostRange(work, &rc)
+					err = decodePostRange(work, rc)
 				}
 			}
 		} else {
 			// we have "community!conference.topic"
-			err = validateConference(confOrTopic, &rc)
+			err = validateConference(confOrTopic, rc)
 			if err == nil {
-				err = decodeTopicNumber(work, &rc)
+				err = decodeTopicNumber(work, rc)
 			}
 		}
 		if err != nil {
 			return nil, err
 		}
-		return &rc, nil
+		return rc, nil
 	} else if pos == 0 {
 		return nil, errors.New("cannot have . at beginning of string")
 	}
 
 	// We definitely have "conference.topic.something" or "community!conference.topic.something"
-	err := validateConference(confOrTopic, &rc)
+	err := validateConference(confOrTopic, rc)
 	if err == nil {
-		err = decodeTopicNumber(work[:pos], &rc)
+		err = decodeTopicNumber(work[:pos], rc)
 	}
 	if err != nil {
 		return nil, err
@@ -386,22 +405,23 @@ func AmDecodePostLink(data string) (*PostLinkData, error) {
 	work = work[pos+1:]
 	if len(work) == 0 {
 		// we had "conference.topic." or "communtiy!conference.topic.", those are both valid
-		return &rc, nil
+		return rc, nil
 	}
-	err = decodePostRange(work, &rc) // the rest must be the post range
+	err = decodePostRange(work, rc) // the rest must be the post range
 	if err != nil {
 		return nil, err
 	}
-	return &rc, nil
+	return rc, nil
 }
 
+// AmCreatePostLinkContext creates a new empty post link context.
 func AmCreatePostLinkContext(community string, commid int32, conference string, topic int16) *PostLinkData {
-	return &PostLinkData{
+	return new(PostLinkData{
 		Community:  community,
 		CommId:     commid,
 		Conference: conference,
 		Topic:      topic,
 		FirstPost:  -1,
 		LastPost:   -1,
-	}
+	})
 }

database/services.go

@@ -25,6 +25,20 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
+// The service domain names.
+const (
+	AM_DOMAIN_COMMUNITY = "community"
+)
+
+// The service names.
+const (
+	AM_SVC_PROFILE    = "Profile"
+	AM_SVC_ADMIN      = "Admin"
+	AM_SVC_SYSADMIN   = "SysAdmin"
+	AM_SVC_CONFERENCE = "Conference"
+	AM_SVC_MEMBERS    = "Members"
+)
+
 // ServiceVTable is a series of functions called for services on specific events.
 type ServiceVTable interface {
 	OnNewCommunity(context.Context, *sqlx.Tx, *Community) error
@@ -114,13 +128,13 @@ func init() {
 		serviceRoot.Domains[i].seqOrder = sqo
 		serviceRoot.byName[dom.DomainName] = &(serviceRoot.Domains[i])
 	}
-	dom := serviceRoot.byName["community"]
+	dom := serviceRoot.byName[AM_DOMAIN_COMMUNITY]
 	empty := emptyServiceVTable{}
-	dom.byId["Profile"].vtable = &empty
-	dom.byId["Admin"].vtable = &empty
-	dom.byId["SysAdmin"].vtable = &empty
-	dom.byId["Conference"].vtable = &(conferenceServiceVTable{})
-	dom.byId["Members"].vtable = &empty
+	dom.byId[AM_SVC_PROFILE].vtable = &empty
+	dom.byId[AM_SVC_ADMIN].vtable = &empty
+	dom.byId[AM_SVC_SYSADMIN].vtable = &empty
+	dom.byId[AM_SVC_CONFERENCE].vtable = &(conferenceServiceVTable{})
+	dom.byId[AM_SVC_MEMBERS].vtable = &empty
 }
 
 // setupServicesCache sets up the services cache.
@@ -166,7 +180,7 @@ func AmGetCommunityServices(ctx context.Context, cid int32) ([]*ServiceDef, erro
 		if err != nil {
 			return nil, err
 		}
-		dom := serviceRoot.byName["community"]
+		dom := serviceRoot.byName[AM_DOMAIN_COMMUNITY]
 		a := make([]*ServiceDef, 0, len(dom.Services))
 		for rs.Next() {
 			var ndx int16
@@ -198,7 +212,7 @@ func AmGetCommunityServicesTx(ctx context.Context, tx *sqlx.Tx, cid int32) ([]*S
 		if err != nil {
 			return nil, err
 		}
-		dom := serviceRoot.byName["community"]
+		dom := serviceRoot.byName[AM_DOMAIN_COMMUNITY]
 		a := make([]*ServiceDef, 0, len(dom.Services))
 		for rs.Next() {
 			var ndx int16
@@ -222,7 +236,7 @@ func AmGetCommunityServicesTx(ctx context.Context, tx *sqlx.Tx, cid int32) ([]*S
  *     Standard Go error status.
  */
 func AmEstablishCommunityServices(ctx context.Context, tx *sqlx.Tx, c *Community) error {
-	dom := serviceRoot.byName["community"]
+	dom := serviceRoot.byName[AM_DOMAIN_COMMUNITY]
 	a := make([]*ServiceDef, 0, len(dom.Services))
 	for i, svc := range dom.Services {
 		if svc.Default {

database/topic.go

@@ -44,10 +44,10 @@ type Topic struct {
 
 // Link returns a link string to this topic.
 func (t *Topic) Link(ctx context.Context, commid int32, scope string) (string, error) {
-	if scope == "conference" {
+	if scope == PLSCOPE_CONFERENCE {
 		return fmt.Sprintf("%d.", t.Number), nil
 	}
-	if scope == "community" || scope == "global" {
+	if scope == PLSCOPE_COMMUNITY || scope == PLSCOPE_GLOBAL {
 		conf, err := AmGetConference(ctx, t.ConfId)
 		if err == nil {
 			var plink string

email/templates/invite_private.jet

@@ -18,12 +18,12 @@ a Amsterdam account.  Once you have completed the process, click the "Join Now"
 button.  You will be prompted for the "password" for this community, which is
 "{{ comm.JoinKey }}". You will then be able to take part in the conferences that are
 going on in the community.
-{{ if mode == "conference" }}
+{{ if mode == INVMODE_CONFERENCE }}
 After you've joined the "{{ comm.Name }}" community, check out the
 "{{ conf.Name }}" conference.  To find it, after joining the community,
 click "Conferences" on the left menu bar, then click on the
 "{{ conf.Name }}" conference name in the conference list.
-{{ else if mode == "topic" }}
+{{ else if mode == INVMODE_TOPIC }}
 After you've joined the "{{ comm.Name }}" community, check out the
 "{{ topic.Name | raw }}" topic in the "{{ conf.Name }}" conference.  To find it,
 after joining the community, click "Conferences" on the left menu bar, then

email/templates/invite_public.jet

@@ -17,12 +17,12 @@ link at the top of the page, or click the "Log In" link if you already have
 a Amsterdam account.  Once you have completed the process, click the "Join Now"
 button.  You will then be able to take part in the conferences that are
 going on in the community.
-{{ if mode == "conference" }}
+{{ if mode == INVMODE_CONFERENCE }}
 After you've joined the "{{ comm.Name }}" community, check out the
 "{{ conf.Name }}" conference.  To find it, after joining the community,
 click "Conferences" on the left menu bar, then click on the
 "{{ conf.Name }}" conference name in the conference list.
-{{ else if mode == "topic" }}
+{{ else if mode == INVMODE_TOPIC }}
 After you've joined the "{{ comm.Name }}" community, check out the
 "{{ topic.Name | raw }}" topic in the "{{ conf.Name }}" conference.  To find it,
 after joining the community, click "Conferences" on the left menu bar, then

find.go

@@ -330,7 +330,7 @@ func commonFindGetBackend(ctxt ui.AmContext) (string, any) {
  */
 func FindPostsPageCommunity(ctxt ui.AmContext) (string, any) {
 	comm := ctxt.CurrentCommunity()
-	ctxt.VarMap().Set("scope", "community")
+	ctxt.VarMap().Set("scope", database.PLSCOPE_COMMUNITY)
 	ctxt.VarMap().Set("entityName", comm.Name)
 	ctxt.VarMap().Set("backlink", fmt.Sprintf("/comm/%s/conf", comm.Alias))
 	ctxt.VarMap().Set("postlink", fmt.Sprintf("/comm/%s/find", comm.Alias))
@@ -346,7 +346,7 @@ func FindPostsPageCommunity(ctxt ui.AmContext) (string, any) {
  */
 func FindPostsPageConference(ctxt ui.AmContext) (string, any) {
 	conf := ctxt.GetScratch("currentConference").(*database.Conference)
-	ctxt.VarMap().Set("scope", "conference")
+	ctxt.VarMap().Set("scope", database.PLSCOPE_CONFERENCE)
 	ctxt.VarMap().Set("entityName", conf.Name)
 	ctxt.VarMap().Set("backlink", ctxt.GetScratch("ConferenceLink").(string))
 	ctxt.VarMap().Set("postlink", fmt.Sprintf("%s/find", ctxt.GetScratch("ConferenceLink")))
@@ -362,7 +362,7 @@ func FindPostsPageConference(ctxt ui.AmContext) (string, any) {
  */
 func FindPostsPageTopic(ctxt ui.AmContext) (string, any) {
 	topic := ctxt.GetScratch("currentTopic").(*database.Topic)
-	ctxt.VarMap().Set("scope", "topic")
+	ctxt.VarMap().Set("scope", database.PLSCOPE_TOPIC)
 	ctxt.VarMap().Set("entityName", topic.Name)
 	ctxt.VarMap().Set("backlink", fmt.Sprintf("%s/r/%d", ctxt.GetScratch("ConferenceLink"), topic.Number))
 	ctxt.VarMap().Set("postlink", fmt.Sprintf("%s/op/%d/find", ctxt.GetScratch("ConferenceLink"), topic.Number))
@@ -417,7 +417,7 @@ func commonFindPostBackend(ctxt ui.AmContext, comm *database.Community, conf *da
  */
 func FindPostsCommunity(ctxt ui.AmContext) (string, any) {
 	comm := ctxt.CurrentCommunity()
-	ctxt.VarMap().Set("scope", "community")
+	ctxt.VarMap().Set("scope", database.PLSCOPE_COMMUNITY)
 	ctxt.VarMap().Set("entityName", comm.Name)
 	ctxt.VarMap().Set("backlink", fmt.Sprintf("/comm/%s/conf", comm.Alias))
 	ctxt.VarMap().Set("postlink", fmt.Sprintf("/comm/%s/find", comm.Alias))
@@ -434,7 +434,7 @@ func FindPostsCommunity(ctxt ui.AmContext) (string, any) {
 func FindPostsConference(ctxt ui.AmContext) (string, any) {
 	comm := ctxt.CurrentCommunity()
 	conf := ctxt.GetScratch("currentConference").(*database.Conference)
-	ctxt.VarMap().Set("scope", "conference")
+	ctxt.VarMap().Set("scope", database.PLSCOPE_CONFERENCE)
 	ctxt.VarMap().Set("entityName", conf.Name)
 	ctxt.VarMap().Set("backlink", ctxt.GetScratch("ConferenceLink").(string))
 	ctxt.VarMap().Set("postlink", fmt.Sprintf("%s/find", ctxt.GetScratch("ConferenceLink")))
@@ -452,7 +452,7 @@ func FindPostsTopic(ctxt ui.AmContext) (string, any) {
 	comm := ctxt.CurrentCommunity()
 	conf := ctxt.GetScratch("currentConference").(*database.Conference)
 	topic := ctxt.GetScratch("currentTopic").(*database.Topic)
-	ctxt.VarMap().Set("scope", "topic")
+	ctxt.VarMap().Set("scope", database.PLSCOPE_TOPIC)
 	ctxt.VarMap().Set("entityName", topic.Name)
 	ctxt.VarMap().Set("backlink", fmt.Sprintf("%s/r/%d", ctxt.GetScratch("ConferenceLink"), topic.Number))
 	ctxt.VarMap().Set("postlink", fmt.Sprintf("%s/op/%d/find", ctxt.GetScratch("ConferenceLink"), topic.Number))

invites.go

@@ -21,6 +21,13 @@ import (
 	"git.erbosoft.com/amy/amsterdam/ui"
 )
 
+// Invitation modes.
+const (
+	INVMODE_COMMUNITY  = "community"
+	INVMODE_CONFERENCE = "conference"
+	INVMODE_TOPIC      = "topic"
+)
+
 /* InviteToCommunity displays the community invitation form.
  * Parameters:
  *     ctxt - The AmContext for the request.
@@ -116,7 +123,7 @@ func InviteSend(ctxt ui.AmContext) (string, any) {
 	} else {
 		return "error", EPARAM
 	}
-	mode := "community"
+	mode := INVMODE_COMMUNITY
 	var conf *database.Conference = nil
 	var topic *database.Topic = nil
 	if ctxt.FormFieldIsSet("confid") {
@@ -145,9 +152,9 @@ func InviteSend(ctxt ui.AmContext) (string, any) {
 			if err != nil {
 				return "errors", err
 			}
-			mode = "topic"
+			mode = INVMODE_TOPIC
 		} else {
-			mode = "conference"
+			mode = INVMODE_CONFERENCE
 		}
 	}
 	addr := ctxt.FormField("addr")
@@ -168,6 +175,9 @@ func InviteSend(ctxt ui.AmContext) (string, any) {
 		mailMessage.SetTemplate("invite_private.jet")
 	}
 	mailMessage.AddTo(addr, "")
+	mailMessage.AddVariable("INVMODE_COMMUNITY", INVMODE_COMMUNITY)
+	mailMessage.AddVariable("INVMODE_CONFERENCE", INVMODE_CONFERENCE)
+	mailMessage.AddVariable("INVMODE_TOPIC", INVMODE_TOPIC)
 	mailMessage.AddVariable("comm", comm)
 	mailMessage.AddVariable("conf", conf)
 	mailMessage.AddVariable("topic", topic)

top.go

@@ -288,7 +288,7 @@ func JumpToShortcut(ctxt ui.AmContext) (string, any) {
 		return "error", echo.NewHTTPError(http.StatusNotFound, fmt.Sprintf("not found: %s", ctxt.URLParam("postlink"))).Wrap(err)
 	}
 	scope, target := link.Classify()
-	if scope != "global" {
+	if scope != database.PLSCOPE_GLOBAL {
 		return "error", echo.NewHTTPError(http.StatusNotFound, fmt.Sprintf("not found: %s", ctxt.URLParam("postlink")))
 	}
 	if err = link.VerifyNames(ctxt.Ctx()); err != nil {
@@ -296,13 +296,13 @@ func JumpToShortcut(ctxt ui.AmContext) (string, any) {
 	}
 	targetURL := ""
 	switch target {
-	case "community":
+	case database.PLCLASS_COMMUNITY:
 		targetURL = fmt.Sprintf("/comm/%s", link.Community)
-	case "conference":
+	case database.PLCLASS_CONFERENCE:
 		targetURL = fmt.Sprintf("/comm/%s/conf/%s", link.Community, link.Conference)
-	case "topic":
+	case database.PLCLASS_TOPIC:
 		targetURL = fmt.Sprintf("/comm/%s/conf/%s/r/%d", link.Community, link.Conference, link.Topic)
-	case "post", "postrange", "postopenrange":
+	case database.PLCLASS_POST, database.PLCLASS_POSTRANGE, database.PLCLASS_POSTOPENRANGE:
 		targetURL = fmt.Sprintf("/comm/%s/conf/%s/r/%d?r=%d,%d", link.Community, link.Conference, link.Topic, link.FirstPost, link.LastPost)
 	default:
 		return "error", fmt.Sprintf("invalid target '%s' for link: %s", target, ctxt.URLParam("postlink"))

ui/middleware.go

@@ -97,7 +97,7 @@ func ValidateConference(next echo.HandlerFunc) echo.HandlerFunc {
 	return func(c *echo.Context) error {
 		ctxt := AmContextFromEchoContext(c)
 		comm := ctxt.CurrentCommunity() // set by middleware
-		b, err := database.AmTestService(c.Request().Context(), comm, "Conference")
+		b, err := database.AmTestService(c.Request().Context(), comm, database.AM_SVC_CONFERENCE)
 		if err != nil {
 			return AmSendPageData(c, ctxt, "error", err)
 		}

ui/templates.go

@@ -309,6 +309,9 @@ func setupTemplates() {
 	views.AddGlobal("AmsterdamVersion", config.AMSTERDAM_VERSION)
 	views.AddGlobal("AmsterdamCopyright", config.AMSTERDAM_COPYRIGHT)
 	views.AddGlobal("GlobalConfig", config.GlobalConfig)
+	views.AddGlobal("PLSCOPE_COMMUNITY", database.PLSCOPE_COMMUNITY)
+	views.AddGlobal("PLSCOPE_CONFERENCE", database.PLSCOPE_CONFERENCE)
+	views.AddGlobal("PLSCOPE_TOPIC", database.PLSCOPE_TOPIC)
 	views.AddGlobalFunc("iif", immediateIf)
 	views.AddGlobalFunc("postRewrite", postRewrite)
 	views.AddGlobalFunc("MakeIntRange", makeIntRange)

ui/views/find_posts.jet

@@ -13,11 +13,11 @@
     <div class="mb-2">
         <div class=" flex items-baseline gap-2">
             <h1 class="text-blue-800 text-4xl font-bold">Find Posts</h1>
-            {{ if scope == "community" }}
+            {{ if scope == PLSCOPE_COMMUNITY }}
                 <span class="text-blue-800 text-xl font-bold ml-2">in Community: {{ entityName }}</span>
-            {{ else if scope == "conference" }}
+            {{ else if scope == PLSCOPE_CONFERENCE }}
                 <span class="text-blue-800 text-xl font-bold ml-2">in Conference: {{ entityName }}</span>
-            {{ else if scope == "topic" }}
+            {{ else if scope == PLSCOPE_TOPIC }}
                 <span class="text-blue-800 text-xl font-bold ml-2">in Topic: {{ entityName | raw }}</span>
             {{ end }}
         </div>
@@ -26,11 +26,11 @@
 
     <!-- Backlink -->
     <div class="mb-4">
-        {{ if scope == "community" }}
+        {{ if scope == PLSCOPE_COMMUNITY }}
             <a class="text-blue-700 hover:text-blue-900 text-sm font-medium" href="{{ backlink }}">Return to Conference List</a>
-        {{ else if scope == "conference" }}
+        {{ else if scope == PLSCOPE_CONFERENCE }}
             <a class="text-blue-700 hover:text-blue-900 text-sm font-medium" href="{{ backlink }}">Return to Topic List</a>
-        {{ else if scope == "topic" }}
+        {{ else if scope == PLSCOPE_TOPIC }}
             <a class="text-blue-700 hover:text-blue-900 text-sm font-medium" href="{{ backlink }}">Return to Topic</a>
         {{ end }}
     </div>