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import { createStore, produce } from "solid-js/store"
import { createSimpleContext } from "./helper"
import { batch, createEffect, createMemo } from "solid-js"
import { useSync } from "./sync"
import { makePersisted } from "@solid-primitives/storage"
import { TextSelection, useLocal } from "./local"
import { pipe, sumBy } from "remeda"
import { AssistantMessage } from "@opencode-ai/sdk"
export const { use: useSession, provider: SessionProvider } = createSimpleContext({
name: "Session",
init: (props: { sessionId?: string }) => {
const sync = useSync()
const local = useLocal()
const [store, setStore] = makePersisted(
createStore<{
messageId?: string
tabs: {
active?: string
opened: string[]
}
prompt: Prompt
cursor?: number
}>({
tabs: {
opened: [],
},
prompt: clonePrompt(DEFAULT_PROMPT),
cursor: undefined,
}),
{
name: props.sessionId ?? "new-session",
},
)
createEffect(() => {
if (!props.sessionId) return
sync.session.sync(props.sessionId)
})
const info = createMemo(() => (props.sessionId ? sync.session.get(props.sessionId) : undefined))
const messages = createMemo(() => (props.sessionId ? (sync.data.message[props.sessionId] ?? []) : []))
const userMessages = createMemo(() =>
messages()
.filter((m) => m.role === "user")
.sort((a, b) => b.id.localeCompare(a.id)),
)
const lastUserMessage = createMemo(() => {
return userMessages()?.at(0)
})
const activeMessage = createMemo(() => {
if (!store.messageId) return lastUserMessage()
return userMessages()?.find((m) => m.id === store.messageId)
})
const working = createMemo(() => {
if (!props.sessionId) return false
const last = lastUserMessage()
if (!last) return false
const assistantMessages = sync.data.message[props.sessionId]?.filter(
(m) => m.role === "assistant" && m.parentID == last?.id,
) as AssistantMessage[]
const error = assistantMessages?.find((m) => m?.error)?.error
return !last?.summary?.body && !error
})
const cost = createMemo(() => {
const total = pipe(
messages(),
sumBy((x) => (x.role === "assistant" ? x.cost : 0)),
)
return new Intl.NumberFormat("en-US", {
style: "currency",
currency: "USD",
}).format(total)
})
const last = createMemo(
() => messages().findLast((x) => x.role === "assistant" && x.tokens.output > 0) as AssistantMessage,
)
const model = createMemo(() =>
last() ? sync.data.provider.find((x) => x.id === last().providerID)?.models[last().modelID] : undefined,
)
const diffs = createMemo(() => (props.sessionId ? (sync.data.session_diff[props.sessionId] ?? []) : []))
const tokens = createMemo(() => {
if (!last()) return
const tokens = last().tokens
return tokens.input + tokens.output + tokens.reasoning + tokens.cache.read + tokens.cache.write
})
const context = createMemo(() => {
const total = tokens()
const limit = model()?.limit.context
if (!total || !limit) return 0
return Math.round((total / limit) * 100)
})
return {
id: props.sessionId,
info,
working,
diffs,
prompt: {
current: createMemo(() => store.prompt),
cursor: createMemo(() => store.cursor),
dirty: createMemo(() => !isPromptEqual(store.prompt, DEFAULT_PROMPT)),
set(prompt: Prompt, cursorPosition?: number) {
const next = clonePrompt(prompt)
batch(() => {
setStore("prompt", next)
if (cursorPosition !== undefined) setStore("cursor", cursorPosition)
})
},
},
messages: {
all: messages,
user: userMessages,
last: lastUserMessage,
active: activeMessage,
setActive(id: string | undefined) {
setStore("messageId", id)
},
},
usage: {
tokens,
cost,
context,
},
layout: {
tabs: store.tabs,
setActiveTab(tab: string | undefined) {
setStore("tabs", "active", tab)
},
setOpenedTabs(tabs: string[]) {
setStore("tabs", "opened", tabs)
},
async openTab(tab: string) {
if (tab === "chat") {
setStore("tabs", "active", undefined)
return
}
if (tab.startsWith("file://")) {
await local.file.open(tab.replace("file://", ""))
}
if (tab !== "review") {
if (!store.tabs.opened.includes(tab)) {
setStore("tabs", "opened", [...store.tabs.opened, tab])
}
}
setStore("tabs", "active", tab)
},
closeTab(tab: string) {
batch(() => {
setStore(
"tabs",
"opened",
store.tabs.opened.filter((x) => x !== tab),
)
if (store.tabs.active === tab) {
const index = store.tabs.opened.findIndex((f) => f === tab)
const previous = store.tabs.opened[Math.max(0, index - 1)]
setStore("tabs", "active", previous)
}
})
},
moveTab(tab: string, to: number) {
const index = store.tabs.opened.findIndex((f) => f === tab)
if (index === -1) return
setStore(
"tabs",
"opened",
produce((opened) => {
opened.splice(to, 0, opened.splice(index, 1)[0])
}),
)
},
},
}
},
})
interface PartBase {
content: string
start: number
end: number
}
export interface TextPart extends PartBase {
type: "text"
}
export interface FileAttachmentPart extends PartBase {
type: "file"
path: string
selection?: TextSelection
}
export type ContentPart = TextPart | FileAttachmentPart
export type Prompt = ContentPart[]
export const DEFAULT_PROMPT: Prompt = [{ type: "text", content: "", start: 0, end: 0 }]
export function isPromptEqual(promptA: Prompt, promptB: Prompt): boolean {
if (promptA.length !== promptB.length) return false
for (let i = 0; i < promptA.length; i++) {
const partA = promptA[i]
const partB = promptB[i]
if (partA.type !== partB.type) return false
if (partA.type === "text" && partA.content !== (partB as TextPart).content) {
return false
}
if (partA.type === "file" && partA.path !== (partB as FileAttachmentPart).path) {
return false
}
}
return true
}
function cloneSelection(selection?: TextSelection) {
if (!selection) return undefined
return { ...selection }
}
function clonePart(part: ContentPart): ContentPart {
if (part.type === "text") return { ...part }
return {
...part,
selection: cloneSelection(part.selection),
}
}
function clonePrompt(prompt: Prompt): Prompt {
return prompt.map(clonePart)
}
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