tech(LS): moving hover functionality to engines (#1766)

* Moves hover impl to engines, for further details:
prisma/prisma-engines#4923

packages/language-server/src/__test__/__fixtures__/multi-file/user-posts/Post.prisma

@@ -1,6 +1,6 @@
 /// This is a blog post
 model Post {
-    id       String @id @default(uuid())
+    id       String @id @default(uuid()) @map("_id")
     title    String
     content  String
     authorId String

packages/language-server/src/__test__/__fixtures__/multi-file/user-posts/User.prisma

@@ -1,7 +1,11 @@
 /// This is the user of the platform
 model User {
-    id    String @id @default(uuid())
+    id    String @id @default(uuid()) @map("_id")
     name  String
     email String
     posts Post[]
+
+    address Address
+
+    favouriteAnimal FavouriteAnimal
 }

packages/language-server/src/__test__/__fixtures__/multi-file/user-posts/address.prisma

@@ -0,0 +1,6 @@
+/// Petrichor V
+type Address {
+    /// ISO 3166-2 standard
+    country String
+    POBox   Int
+}

packages/language-server/src/__test__/__fixtures__/multi-file/user-posts/animal.prisma

@@ -0,0 +1,6 @@
+/// My favourite is the red panda, could you tell?
+enum FavouriteAnimal {
+    RedPanda
+    Cat
+    Dog
+}

packages/language-server/src/__test__/__fixtures__/multi-file/user-posts/config.prisma

@@ -1,5 +1,5 @@
 datasource db {
-    provider = "postgresql"
+    provider = "mongodb"
     url      = env("DATABASE_URL")
 }
 

packages/language-server/src/__test__/hover.test.ts

@@ -0,0 +1,135 @@
+import { test, expect, describe } from 'vitest'
+import { handleHoverRequest } from '../lib/MessageHandler'
+import { getMultifileHelper } from './MultifileHelper'
+
+describe('hover', () => {
+  test('model doc from field', async () => {
+    const helper = await getMultifileHelper('user-posts')
+    const user = helper.file('User.prisma')
+
+    const response = handleHoverRequest(helper.schema, user.textDocument, {
+      textDocument: {
+        uri: user.uri,
+      },
+      position: user.lineContaining('posts Post[]').characterAfter('Po'),
+    })
+
+    expect(response).toMatchInlineSnapshot(`
+      {
+        "contents": {
+          "kind": "markdown",
+          "value": "\`\`\`prisma
+      model Post {
+      	...
+      	author User @relation(name: "PostToUser", fields: [authorId], references: [id])
+      }
+      \`\`\`
+      ___
+      one-to-many
+      ___
+      This is a blog post",
+        },
+      }
+    `)
+  })
+
+  test('enum doc from field', async () => {
+    const helper = await getMultifileHelper('user-posts')
+    const user = helper.file('User.prisma')
+
+    const response = handleHoverRequest(helper.schema, user.textDocument, {
+      textDocument: {
+        uri: user.uri,
+      },
+      position: user.lineContaining('favouriteAnimal FavouriteAnimal').characterAfter('Favo'),
+    })
+
+    expect(response).toMatchInlineSnapshot(`
+      {
+        "contents": {
+          "kind": "markdown",
+          "value": "\`\`\`prisma
+      enum FavouriteAnimal {}
+      \`\`\`
+      ___
+      My favourite is the red panda, could you tell?",
+        },
+      }
+    `)
+  })
+
+  test('composite doc from field', async () => {
+    const helper = await getMultifileHelper('user-posts')
+    const user = helper.file('User.prisma')
+
+    const response = handleHoverRequest(helper.schema, user.textDocument, {
+      textDocument: {
+        uri: user.uri,
+      },
+      position: user.lineContaining('address Address').characterAfter('Addr'),
+    })
+
+    expect(response).toMatchInlineSnapshot(`
+      {
+        "contents": {
+          "kind": "markdown",
+          "value": "\`\`\`prisma
+      type Address {}
+      \`\`\`
+      ___
+      Petrichor V",
+        },
+      }
+    `)
+  })
+
+  test('doc from block name', async () => {
+    const helper = await getMultifileHelper('user-posts')
+    const user = helper.file('animal.prisma')
+
+    const response = handleHoverRequest(helper.schema, user.textDocument, {
+      textDocument: {
+        uri: user.uri,
+      },
+      position: user.lineContaining('enum FavouriteAnimal {').characterAfter('Fav'),
+    })
+
+    expect(response).toMatchInlineSnapshot(`
+      {
+        "contents": {
+          "kind": "markdown",
+          "value": "\`\`\`prisma
+      enum FavouriteAnimal {}
+      \`\`\`
+      ___
+      My favourite is the red panda, could you tell?",
+        },
+      }
+    `)
+  })
+
+  test('doc from field name', async () => {
+    const helper = await getMultifileHelper('user-posts')
+    const user = helper.file('address.prisma')
+
+    const response = handleHoverRequest(helper.schema, user.textDocument, {
+      textDocument: {
+        uri: user.uri,
+      },
+      position: user.lineContaining('country String').characterAfter('cou'),
+    })
+
+    expect(response).toMatchInlineSnapshot(`
+      {
+        "contents": {
+          "kind": "markdown",
+          "value": "\`\`\`prisma
+      country
+      \`\`\`
+      ___
+      ISO 3166-2 standard",
+        },
+      }
+    `)
+  })
+})

packages/language-server/src/__test__/jump-to-definition/multi-file.test.ts

@@ -19,7 +19,7 @@ test('basic doc', async () => {
         "targetRange": {
           "end": {
             "character": 1,
-            "line": 6,
+            "line": 10,
           },
           "start": {
             "character": 0,

packages/language-server/src/__test__/rename/multi-file.test.ts

@@ -52,11 +52,11 @@ test('rename model', async () => {
             "range": {
               "end": {
                 "character": 1,
-                "line": 6,
+                "line": 10,
               },
               "start": {
                 "character": 0,
-                "line": 6,
+                "line": 10,
               },
             },
           },
@@ -69,7 +69,7 @@ test('rename model', async () => {
     {
       "file:///user-posts/Post.prisma": "/// This is a blog post
     model Post {
-        id       String @id @default(uuid())
+        id       String @id @default(uuid()) @map("_id")
         title    String
         content  String
         authorId String
@@ -78,10 +78,14 @@ test('rename model', async () => {
     ",
       "file:///user-posts/User.prisma": "/// This is the user of the platform
     model Account {
-        id    String @id @default(uuid())
+        id    String @id @default(uuid()) @map("_id")
         name  String
         email String
         posts Post[]
+
+        address Address
+
+        favouriteAnimal FavouriteAnimal
     	@@map("User")
     }
     ",
@@ -133,19 +137,6 @@ test('rename field', async () => {
               },
             },
           },
-          {
-            "newText": " @map("id")",
-            "range": {
-              "end": {
-                "character": 36,
-                "line": 2,
-              },
-              "start": {
-                "character": 36,
-                "line": 2,
-              },
-            },
-          },
         ],
       },
     }
@@ -155,7 +146,7 @@ test('rename field', async () => {
     {
       "file:///user-posts/Post.prisma": "/// This is a blog post
     model Post {
-        id       String @id @default(uuid())
+        id       String @id @default(uuid()) @map("_id")
         title    String
         content  String
         authorId String
@@ -164,10 +155,14 @@ test('rename field', async () => {
     ",
       "file:///user-posts/User.prisma": "/// This is the user of the platform
     model User {
-        primaryKey    String @id @default(uuid() @map("id"))
+        primaryKey    String @id @default(uuid()) @map("_id")
         name  String
         email String
         posts Post[]
+
+        address Address
+
+        favouriteAnimal FavouriteAnimal
     }
     ",
     }

packages/language-server/src/lib/MessageHandler.ts

@@ -56,6 +56,7 @@ import { prismaSchemaWasmCompletions, localCompletions } from './completions'
 import { PrismaSchema, SchemaDocument } from './Schema'
 import { DiagnosticMap } from './DiagnosticMap'
 import references from './prisma-schema-wasm/references'
+import hover from './prisma-schema-wasm/hover'
 
 export function handleDiagnosticsRequest(
   schema: PrismaSchema,
@@ -190,27 +191,9 @@ export function handleHoverRequest(
   schema: PrismaSchema,
   initiatingDocument: TextDocument,
   params: HoverParams,
+  onError?: (errorMessage: string) => void,
 ): Hover | undefined {
-  const position = params.position
-
-  const word = getWordAtPosition(initiatingDocument, position)
-
-  if (word === '') {
-    return
-  }
-
-  const block = getDatamodelBlock(word, schema)
-  if (!block) {
-    return
-  }
-
-  const blockDocumentation = getDocumentationForBlock(block)
-
-  if (blockDocumentation.length !== 0) {
-    return {
-      contents: blockDocumentation.join('\n\n'),
-    }
-  }
+  return hover(schema, initiatingDocument, params, onError)
 }
 
 /**