Import WhatsApp history into a child

[onechat] / memory.go

diff --git a/memory.go b/memory.go
index 7cbcce68c40f4b06382e3c8f3e71dfcbb3388d26..a240b6c16d1d898e3051f3e0a0c7a19434061b3e 100644 (file)
--- a/memory.go
+++ b/memory.go
@@ -5,7 +5,7 @@ import (
        "encoding/json"
        "errors"
        "fmt"
        "encoding/json"
        "errors"
        "fmt"

-       "log"
+       "log/slog"

        "os"
        "path/filepath"
        "strings"
        "os"
        "path/filepath"
        "strings"


@@ -25,7 +25,7 @@ var (
 // openMemory opens the chat in root and starts the builds that are ready. The
 // clock gives the dates of new messages and the days of new nodes. logger gets
 // one line for each failed build. The builds stop when ctx ends or at Close.
 // openMemory opens the chat in root and starts the builds that are ready. The
 // clock gives the dates of new messages and the days of new nodes. logger gets
 // one line for each failed build. The builds stop when ctx ends or at Close.

-func openMemory(ctx context.Context, root string, clock func() time.Time, summarizer Summarizer, logger *log.Logger) (*Memory, error) {
+func openMemory(ctx context.Context, root string, clock func() time.Time, summarizer Summarizer, logger *slog.Logger) (*Memory, error) {

        log, err := openLog(ctx, root, clock)
        if err != nil {
                return nil, err
        log, err := openLog(ctx, root, clock)
        if err != nil {
                return nil, err


@@ -108,7 +108,7 @@ type Memory struct {
        cview      *View
        queue      *BuildQueue
        summarizer Summarizer
        cview      *View
        queue      *BuildQueue
        summarizer Summarizer

-       logger     *log.Logger
+       logger     *slog.Logger

        ctx        context.Context
        cancel     context.CancelFunc
        workers    sync.WaitGroup
        ctx        context.Context
        cancel     context.CancelFunc
        workers    sync.WaitGroup


@@ -149,6 +149,11 @@ func (m *Memory) AppendDated(kind, text, date string) (Message, error) {
        m.mutex.Lock()
        defer m.mutex.Unlock()
 
        m.mutex.Lock()
        defer m.mutex.Unlock()
 

+       return m.appendDated(kind, text, date)
+}
+
+// appendDated appends under the memory lock and updates the views and builds.
+func (m *Memory) appendDated(kind, text, date string) (Message, error) {

        message, err := m.log.AppendDated(kind, text, date)
        if err != nil {
                return Message{}, fmt.Errorf("append dated log message: %w", err)
        message, err := m.log.AppendDated(kind, text, date)
        if err != nil {
                return Message{}, fmt.Errorf("append dated log message: %w", err)


@@ -172,6 +177,44 @@ func (m *Memory) AppendDated(kind, text, date string) (Message, error) {
        return message, nil
 }
 
        return message, nil
 }
 

+// AppendOnce appends a queued message. prepare saves its log ID before the
+// append, under the memory lock. A saved ID permits recovery after a stop
+// between that save and the append, without a second log entry. prepare must
+// not call Memory. The caller stops delivery after a failed append.
+func (m *Memory) AppendOnce(kind, text string, id *int, prepare func(int) error) (Message, error) {
+       m.mutex.Lock()
+       defer m.mutex.Unlock()
+
+       if id != nil && *id < m.log.Len() {
+               message, err := m.log.Message(*id)
+               if err != nil {
+                       return Message{}, fmt.Errorf("read queued message: %w", err)
+               }
+
+               if message.Kind != kind || message.Text != text {
+                       return Message{}, errors.New("queued message does not match its log entry")
+               }
+
+               return message, nil
+       }
+
+       if id != nil && *id != m.log.Len() {
+               return Message{}, errors.New("queued message is beyond the log")
+       }
+
+       err := prepare(m.log.Len())
+       if err != nil {
+               return Message{}, fmt.Errorf("prepare queued message: %w", err)
+       }
+
+       message, err := m.appendDated(kind, text, "")
+       if err != nil {
+               return Message{}, fmt.Errorf("append queued message: %w", err)
+       }
+
+       return message, nil
+}
+

 // children reads the two children of the node key.
 func (m *Memory) children(key NodeKey) (Node, Node, error) {
        var children [2]Node
 // children reads the two children of the node key.
 func (m *Memory) children(key NodeKey) (Node, Node, error) {
        var children [2]Node


@@ -247,6 +290,26 @@ func (m *Memory) Flush(ctx context.Context) error {
        return m.syncer.Flush(ctx)
 }
 
        return m.syncer.Flush(ctx)
 }
 

+// Snapshot flushes all memory writes and runs snapshot while no append or
+// summary write can change the log, indexes, tree, or views. snapshot must not
+// call Memory.
+func (m *Memory) Snapshot(ctx context.Context, snapshot func() error) error {
+       m.mutex.Lock()
+       defer m.mutex.Unlock()
+
+       err := m.Flush(ctx)
+       if err != nil {
+               return fmt.Errorf("flush memory snapshot: %w", err)
+       }
+
+       err = snapshot()
+       if err != nil {
+               return fmt.Errorf("copy memory snapshot: %w", err)
+       }
+
+       return nil
+}
+

 // ViewLines returns the lines of the chat view, each with its newline, without
 // the leaf lines of the messages in skip.
 func (m *Memory) ViewLines(skip map[int]bool) []string {
 // ViewLines returns the lines of the chat view, each with its newline, without
 // the leaf lines of the messages in skip.
 func (m *Memory) ViewLines(skip map[int]bool) []string {


@@ -598,7 +661,7 @@ func (m *Memory) run(key NodeKey, task Task) {
 
 // failed logs the failed build of the node key with its cause err.
 func (m *Memory) failed(key NodeKey, err error) {
 
 // failed logs the failed build of the node key with its cause err.
 func (m *Memory) failed(key NodeKey, err error) {

-       m.logger.Printf("summary failed, retry at next message: node (%d, %d): %v", key.level, key.index, err)
+       m.logger.Warn("summary failed", "level", key.level, "index", key.index, "err", err)

 }
 
 // ready tells if both children of the node key are built and the node is not.
 }
 
 // ready tells if both children of the node key are built and the node is not.