feat: add getOobaString and getTavernString for conversion to other f…

…ormats

src/utils/conversion.ts

@@ -0,0 +1,119 @@
+function extractConversation(data: any): any[] {
+    const current_node = data.current_node
+    const mapping = data.mapping
+
+    const messagesReversed: any[] = []
+    let node_id: any = current_node
+
+    while (node_id !== null && node_id !== undefined) {
+        const current_message = mapping[node_id]
+        messagesReversed.push(current_message)
+        node_id = current_message.parent
+    }
+
+    return messagesReversed.reverse()
+}
+
+function convertMessageToTavern(message_data: any): any | null {
+    if (!message_data.message) {
+        return null
+    }
+
+    const sender_role: string = message_data.message.author.role
+    if (sender_role === 'system') {
+        return null
+    }
+
+    const is_assistant = sender_role === 'assistant'
+    const create_time = Number.parseInt(message_data.message.create_time, 10)
+    const text: string = message_data.message.content.parts[0]
+
+    return {
+        name: is_assistant ? 'Assistant' : 'You',
+        is_user: !is_assistant,
+        is_name: is_assistant,
+        send_date: create_time,
+        mes: text,
+        swipes: [text],
+        swipe_id: 0,
+    }
+}
+
+export function getTavernString(jsonData: any): string {
+    // Takes the OAI JSON data as input, outputs the JSONL string
+    const conversation = extractConversation(jsonData)
+
+    const convertedConvo: any[] = [{
+        user_name: 'You',
+        character_name: 'Assistant',
+    }]
+
+    conversation.forEach((message) => {
+        const convertedMsg = convertMessageToTavern(message)
+        if (convertedMsg !== null) {
+            convertedConvo.push(convertedMsg)
+        }
+    })
+    // This _has_ to be stringified without adding any indentation, due to the JSONL format.
+    return convertedConvo.map(msg => JSON.stringify(msg)).join('\n')
+}
+
+export function getOobaString(jsonData: any): string {
+    // Takes the OAI JSON data as input, outputs the serialized JSON
+    const messages = extractConversation(jsonData)
+    const oobaData: any = {}
+    const pairs: any[] = []
+    let idx = 0
+
+    while (idx < messages.length - 1) {
+        const message = messages[idx]
+        const nextMessage = messages[idx + 1]
+        let role: string, text: string, nextRole: string, nextText: string
+
+        try {
+            role = message.message.author.role
+            text = message.message.content.parts[0]
+            nextRole = nextMessage.message.author.role
+            nextText = nextMessage.message.content.parts[0]
+        }
+        catch (error) {
+            idx += 1
+            continue
+        }
+
+        if (role === 'system') {
+            if (text !== '') {
+                pairs.push(['<|BEGIN-VISIBLE-CHAT|>', text])
+            }
+            idx += 1
+            continue
+        }
+
+        if (role === 'user') {
+            if (nextRole === 'assistant') {
+                pairs.push([text, nextText])
+                idx += 2
+                continue
+            }
+            else if (nextRole === 'user') {
+                pairs.push([text, ''])
+                idx += 1
+                continue
+            }
+        }
+
+        if (role === 'assistant') {
+            pairs.push(['', text])
+            idx += 1
+        }
+    }
+
+    oobaData.internal = pairs
+    oobaData.visible = JSON.parse(JSON.stringify(pairs))
+
+    if (oobaData.visible[0] && oobaData.visible[0][0] === '<|BEGIN-VISIBLE-CHAT|>') {
+        oobaData.visible[0][0] = ''
+    }
+
+    return JSON.stringify(oobaData, null, 2)
+}