say: move the copy deck into a package memory can import (V-506)

The summaries family is spoken by internal/memory, internal/morning and
internal/tasks. internal/phraser already imports internal/memory, so the
deck cannot stay in phraser without a cycle.

internal/say is a leaf: embed, json, math/rand, strings, sync. The four
phraser families keep their files and their floors and now call say.Load,
*say.Deck, Text, Matches, Variants, RequirePlaceholder and RegisterFloor.
No copy changed and no behaviour changed.

internal/phraser/acks.go

@@ -16,6 +16,8 @@ import (
 	"log"
 	"math/rand"
 	"sync"
+
+	"github.com/kami/maven/internal/say"
 )
 
 //go:embed ack_ru_v1.json
@@ -65,7 +67,7 @@ var ackKeys = []string{
 
 // ackFloor — the literal each key falls back to when the file is unusable.
 // These are the exact strings that lived in Go before this file existed.
-var ackFloor = registerFloor(map[string]string{
+var ackFloor = say.RegisterFloor(map[string]string{
 	AckFact:          "записала факт.",
 	AckFactKey:       "отметила: {key}",
 	AckFactValue:     "отметила: {key} = {value}",
@@ -93,12 +95,12 @@ var ackFloor = registerFloor(map[string]string{
 })
 
 // Acks picks a hand-written Russian acknowledgement. Safe for concurrent use.
-type Acks struct{ d *deck }
+type Acks struct{ d *say.Deck }
 
 // LoadAcks reads the embedded file. Pass a source to make the picking
 // reproducible in tests; nil seeds from the clock.
 func LoadAcks(src rand.Source) (*Acks, error) {
-	d, err := loadDeck(ackJSON, AckSchemaVersion, ackKeys, ackFloor, src)
+	d, err := say.Load(ackJSON, AckSchemaVersion, ackKeys, ackFloor, src)
 	if err != nil {
 		return nil, err
 	}
@@ -109,7 +111,7 @@ func LoadAcks(src rand.Source) (*Acks, error) {
 		{AckFactKey, "{key}"}, {AckFactValue, "{key}"}, {AckFactValue, "{value}"},
 		{AckAct, "{fn}"}, {AckTask, "{text}"}, {AckTaskUrgent, "{text}"},
 	} {
-		if err := d.requirePlaceholder(req.key, req.ph); err != nil {
+		if err := d.RequirePlaceholder(req.key, req.ph); err != nil {
 			return nil, err
 		}
 	}
@@ -117,7 +119,7 @@ func LoadAcks(src rand.Source) (*Acks, error) {
 }
 
 // deck reads through a nil *Acks, which is the unloadable-file case.
-func (a *Acks) deck() *deck {
+func (a *Acks) deck() *say.Deck {
 	if a == nil {
 		return nil
 	}
@@ -127,11 +129,11 @@ func (a *Acks) deck() *deck {
 // Say returns one line for key, with his data filled into the frame. Pass nil
 // when the entry takes none.
 func (a *Acks) Say(key string, vars map[string]string) string {
-	return a.deck().text(key, vars)
+	return a.deck().Text(key, vars)
 }
 
 // Variants returns every line the file can produce, for the persona scorer.
-func (a *Acks) Variants() []string { return a.deck().variants() }
+func (a *Acks) Variants() []string { return a.deck().Variants() }
 
 var (
 	ackOnce sync.Once
@@ -158,5 +160,5 @@ func Ack(key string, vars map[string]string) string { return DefaultAcks().Say(k
 // IsAck reports whether text is a line key could have produced. For the daemon
 // tests, which can no longer compare against one literal.
 func IsAck(key string, vars map[string]string, text string) bool {
-	return DefaultAcks().deck().matches(key, vars, text)
+	return DefaultAcks().deck().Matches(key, vars, text)
 }