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type { AuthAdapter, User } from \"./types.tsx\";\nimport { signJWT, verifyJWT } from \"./signer.tsx\";\n\n// GitHub OAuth Adapter\nexport const githubAdapter: AuthAdapter = {\n id: \"github\",\n\n async initiate(ctx: any): Promise {\n const clientId = Deno.env.get(\"GITHUB_CLIENT_ID\");\n if (!clientId) {\n throw new Error(\"GITHUB_CLIENT_ID environment variable is required\");\n }\n\n const redirectUri = `${new URL(ctx.req.url).origin}/auth/github/callback`;\n const scope = \"user:email read:user\";\n const state = crypto.randomUUID();\n\n // Store state in secure cookie for CSRF protection\n ctx.setCookie(\"oauth_state\", state, {\n httpOnly: true,\n secure: true,\n sameSite: \"Lax\",\n maxAge: 60 * 10, // 10 minutes\n path: \"/\",\n });\n\n const githubUrl = new URL(\"https://github.com/login/oauth/authorize\");\n githubUrl.searchParams.set(\"client_id\", clientId);\n githubUrl.searchParams.set(\"redirect_uri\", redirectUri);\n githubUrl.searchParams.set(\"scope\", scope);\n githubUrl.searchParams.set(\"state\", state);\n\n return githubUrl.toString();\n },\n\n async exchange(ctx: any): Promise {\n const url = new URL(ctx.req.url);\n const code = url.searchParams.get(\"code\");\n const state = url.searchParams.get(\"state\");\n const storedState = ctx.getCookie(\"oauth_state\");\n\n if (!code) {\n throw new Error(\"Authorization code not provided\");\n }\n\n if (!state || !storedState || state !== storedState) {\n throw new Error(\"Invalid state parameter - possible CSRF attack\");\n }\n\n // Clear the state cookie\n ctx.setCookie(\"oauth_state\", \"\", {\n httpOnly: true,\n secure: true,\n sameSite: \"Lax\",\n maxAge: 0,\n path: \"/\",\n });\n\n // Exchange code for access token\n const clientId = Deno.env.get(\"GITHUB_CLIENT_ID\");\n const clientSecret = Deno.env.get(\"GITHUB_CLIENT_SECRET\");\n\n if (!clientId || !clientSecret) {\n throw new Error(\"GitHub OAuth credentials not configured\");\n }\n\n const tokenResponse = await fetch(\n \"https://github.com/login/oauth/access_token\",\n {\n method: \"POST\",\n headers: {\n \"Accept\": \"application/json\",\n \"Content-Type\": \"application/json\",\n },\n body: JSON.stringify({\n client_id: clientId,\n client_secret: clientSecret,\n code,\n }),\n },\n );\n\n const tokenData = await tokenResponse.json();\n\n if (!tokenData.access_token) {\n throw new Error(\"Failed to obtain access token\");\n }\n\n // Fetch user data from GitHub\n const userResponse = await fetch(\"https://api.github.com/user\", {\n headers: {\n \"Authorization\": `Bearer ${tokenData.access_token}`,\n \"Accept\": \"application/vnd.github.v3+json\",\n },\n });\n\n const userData = await userResponse.json();\n\n // Fetch user email (might be private)\n const emailResponse = await fetch(\"https://api.github.com/user/emails\", {\n headers: {\n \"Authorization\": `Bearer ${tokenData.access_token}`,\n \"Accept\": \"application/vnd.github.v3+json\",\n },\n });\n\n const emailData = await emailResponse.json();\n const primaryEmail = emailData.find((email: any) => email.primary)?.email ||\n userData.email;\n\n return {\n id: userData.id.toString(),\n email: primaryEmail,\n name: userData.name || userData.login,\n avatar: userData.avatar_url,\n githubId: userData.id,\n };\n },\n\n async verify(token: string): Promise {\n const payload = await verifyJWT(token);\n\n if (payload.adapterId !== \"github\") {\n throw new Error(\"Invalid adapter ID in token\");\n }\n\n return {\n id: payload.sub,\n email: payload.email || \"\",\n name: payload.name || \"\",\n avatar: undefined, // Avatar not stored in JWT for security\n };\n },\n\n async issue(user: User): Promise {\n return await signJWT(user, \"github\");\n },\n};\n\n// Placeholder adapters\nexport const valAdapter: AuthAdapter = {\n id: \"val\",\n async verify(): Promise {\n throw new Error(\"Val adapter not implemented\");\n },\n async initiate(): Promise {\n throw new Error(\"Val adapter not implemented\");\n },\n async exchange(): Promise {\n throw new Error(\"Val adapter not implemented\");\n },\n async issue(): Promise {\n throw new Error(\"Val adapter not implemented\");\n },\n};\n\nexport const passwordAdapter: AuthAdapter = {\n id: \"password\",\n async verify(): Promise {\n throw new Error(\"Password adapter not implemented\");\n },\n async initiate(): Promise {\n throw new Error(\"Password adapter not implemented\");\n },\n async exchange(): Promise {\n throw new Error(\"Password adapter not implemented\");\n },\n async issue(): Promise {\n throw new Error(\"Password adapter not implemented\");\n },\n};\n","deleted","label",[168,169,149],"lib","core","permalink","https://www.val.town/x/cricks_unmixed4u/authentication/code/lib/core/adapters.tsx","extension","actionData","errors"]